JP2001176700A - Accelerating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the operation at the change without needs of making an operation pattern or correcting it in changing the timing. SOLUTION: The system is equipped with a pulse generator 1 for generating a clock, a counter circuit 2a for outputting and stopping the shielding signal on reaching a given value by the counting of the clock, a gate logic circuit 3a for stopping or passing the clock from the pulse generator according to the output or stop of shielding signal, a pattern generator 4a for holding the fixed value outputted from the previous clock when the clock input from the gate logic circuit is suspended and for outputting fixed value according to the part following the above operating pattern when the clock input is resumed, a power supply 5a for outputting current according to the fixed value outputted from the above pattern generator, and a synchrotron electromagnet 6 for generating a magnetic field excited by the output current from above power supply.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accelerator system for medical equipment, an accelerator apparatus for physical and industrial experiments, an SOR for semiconductor manufacturing, etc., for transporting charged particles such as ions and electrons by accelerating them by an electromagnetic field or the like. It is about.

[0002]

2. Description of the Related Art Among the accelerators for accelerating charged particles, in a synchrotron, it is necessary to operate components such as an injector and an electromagnet in synchronization. For this reason, it is common to generate and control a reference clock signal or event signal. Many of the components of the synchrotron are not operated with a constant current or voltage, but are operated with a certain pattern that changes with time.

A conventional accelerator system will be described with reference to the drawings. FIG. 13 shows, for example, Japanese Patent Application Laid-Open No. 8-276.
It is a block diagram which shows the structure of the conventional medical accelerator apparatus shown by Gazette No. 024. Note that portions not related to the present invention are omitted.

In FIG. 13, reference numeral 200 denotes a respiratory vibration detector for detecting respiratory vibration of a patient, and 201 denotes a respiratory vibration detector 2
Trigger from respiratory vibration detected at 00 (master signal)
, A trigger generator 202 for generating
A clock generator for generating a clock based on a trigger signal issued from the memory device, a memory device for outputting a set value pattern of the electromagnet stored in advance, and a reference numeral 204 according to a set value (pattern) output from the memory device 203 A synchrotron electromagnet power supply for supplying an exciting current to the synchrotron electromagnet; 205, a delay circuit for delaying and outputting a trigger signal generated from the trigger generator 201;
Reference numeral 06 denotes an injector power supply which generates a beam based on the signal output from the delay circuit 205 and enters the synchrotron.

Next, the operation of the conventional accelerator system will be described with reference to the drawings. FIG. 14 is a timing chart showing the operation of the conventional medical accelerator device.

First, a respiratory vibration / amplitude of a patient is detected by a respiratory vibration detector 200, and the output is used as a trigger generator 2
Enter 01. The method for detecting the vibration and amplitude of the breathing is not directly related to the present invention, and thus the description is omitted. The trigger generator 201 generates a trigger for starting the pattern operation so as to operate the accelerator in synchronization with the patient's breath from the input respiratory vibration.

The clock generator 202 generates a clock at a predetermined cycle in response to a trigger input, and the memory device 203 to which the clock is input outputs a pattern (set value) to the synchrotron electromagnet power supply 204 according to the clock. The synchrotron electromagnet power supply 204 supplies an exciting current to the electromagnet in accordance with the input set value. In this way, the electromagnet is operated according to a preset pattern.

[0008] The trigger from the trigger generator 201 is input to a delay circuit 205, and after a predetermined time, an operation start command is sent to the injector power supply 206. The injector power supply 206 starts the injection operation according to the input operation command.

Here, the above operation will be described with reference to FIG. In the figure, (a) a bending electromagnet as an electromagnet of a synchrotron, (b) a trigger signal (master signal),
(C) electromagnet clock, (d) emission device clock,
Each operation of (e) emission device and (f) beam current is shown.

As shown in (a), the bending electromagnets are A: flat base, B: acceleration, C: preparation for emission, D: emission possible,
The operation is divided into E: deceleration preparation and F: deceleration, and the operation is performed by repeating these series of patterns.

This series of operations is performed by the clock generator 202
This is performed by sequentially outputting set values set in advance each time the electromagnetic clock output from the controller is input to the memory device 203. Therefore, the electromagnet clock is continuously performed from the start by the master signal to the end of the pattern.

In the emitting device, a magnetic field is generated only in the portion of the pattern that can be emitted D, but a set value is given to the pattern itself while the emitting device clock is operating. Therefore, the set value is set as the output 0 for the portion where no magnetic field is generated.

Although not shown in FIG. 14, the operation of the accelerating system is the same as that of the electromagnet, and is performed continuously from the start by the master signal to the end of the pattern.

In this way, the clock for operating the pattern of each device in synchronization from the start to the end of the pattern is generally output continuously and used.

[0015]

As described above, since the clock for operating the pattern operation in synchronization is continuously used, the pattern can be changed even when only the time of the emission possible D shown in FIG. 14 is changed. Needs to be recreated,
There is a problem that efficiency is poor because the work takes time.

In addition, when a pattern is re-created, it is common to perform an adjustment operation for checking. Therefore, a large amount of time is required for this operation, and the efficiency is reduced. there were.

Further, in the case of a medical accelerator system,
Since the preliminary confirmation operation of dose measurement is performed for each operation pattern used on that day, the daily operation increases as the number of operation patterns increases, and the actual operation time of the device is shortened.

Further, when the operation is performed in synchronization with the breathing in the case of the medical accelerator, it is possible to improve the irradiation efficiency by making the length of the extractable D shown in FIG. 14 variable and controlling it in accordance with the patient's breathing. However, since the conventional system only executes a fixed pattern, there is a problem that it cannot cope with this.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can significantly reduce the time required for pattern creation and adjustment when changing the time of a portion capable of being emitted, and the time required for daily dose measurement. It is an object of the present invention to provide an accelerator system that can realize efficient driving in accordance with a patient's breathing.

[0020]

According to a first aspect of the present invention, there is provided an accelerator system comprising: a pulse generator for generating a clock having a predetermined cycle; and a clock for stopping or outputting a clock output from the pulse generator at a predetermined timing. A first clock cutoff means that passes therethrough and a first operation pattern held in advance, and a set value corresponding to the first operation pattern is output according to a clock output from the first clock cutoff means;
When the clock input from the first clock cutoff unit is interrupted, the set value output by the previous clock is held as it is, and when the clock input from the first clock cutoff unit is restarted, the first operation pattern is reset. A first pattern generator that outputs a set value in accordance with a continuation portion, a first power supply device that outputs a current according to the set value output from the first pattern generator, and the first power supply device And an electromagnet that generates a magnetic field when excited by an output current from the device.

According to a second aspect of the present invention, there is provided an accelerator system, wherein at a predetermined timing, the clock output from the pulse generator is stopped or passed and a second clock cutoff means for turning a cutoff signal ON or OFF. Holding a second operation pattern in advance, outputting a set value according to the second operation pattern in accordance with a clock output from the second clock cutoff means, and outputting a cutoff signal from the second clock cutoff means Is ON, zero is output as the set value, and the shutoff signal from the second
In the case of FF, a second pattern generator that outputs a set value according to the second operation pattern, and a second power supply device that outputs current or voltage according to the set value output from the second pattern generator An emission device that is energized by an output from the second power supply device and emits a beam, a third clock cutoff unit that stops or passes a clock output from the pulse generator at a predetermined timing, The third operation pattern is retained, a set value corresponding to the third operation pattern is output according to the clock output from the third clock cutoff means, and the clock input from the third clock cutoff means is interrupted. Then, the set value output by the previous clock is held as it is, and when the clock input from the third clock cutoff means is restarted, the third operation pattern is output. A third pattern generator for outputting a set value according to a continuation of the portion of the emissions, the third to output a voltage according to the set value outputted from the third pattern generator
And a high-frequency acceleration system for accelerating the beam with an output voltage from the third power supply.

According to a third aspect of the present invention, in the accelerator system, the first clock cutoff means counts a clock output from the pulse generator and outputs a cutoff signal when the clock reaches a first or second predetermined value. And a gate logic circuit that stops or passes the clock output from the pulse generator in accordance with ON or OFF of the cutoff signal from the counter circuit.

In the accelerator system according to a fourth aspect of the present invention, when the first clock cutoff means measures time and reaches a first or second predetermined value, the cutoff signal is turned ON or OF.
And a gate logic circuit that stops or passes the clock output from the pulse generator in response to ON or OFF of the cutoff signal from the timer circuit.

According to a fifth aspect of the present invention, there is provided an accelerator system comprising: a pulse generator for generating a clock having a predetermined period;
A first pattern switching signal generating means for generating a pattern switching signal at a predetermined timing, and a first operation pattern composed of patterns A and B held in advance, and the pattern is controlled in accordance with a clock output from the pulse generator. A
Is output in accordance with the clock signal output from the pulse generator when the pattern switching signal is input from the first pattern switching signal generating means.
A first pattern generator that outputs a set value according to a first power supply device, a first power supply device that outputs a current according to a set value output from the first pattern generator, and a first power supply device that outputs a current according to the set value output from the first pattern generator. And an electromagnet that generates a magnetic field when excited by the output current.

The accelerator system according to claim 6 of the present invention comprises a second pattern switching signal generating means for generating a pattern switching signal at a predetermined timing, and a second operation pattern composed of patterns C and D in advance. Holding, outputting a set value according to the pattern C according to the clock output from the pulse generator, and receiving a pattern switching signal from the second pattern switching signal generating means, the clock output from the pulse generator. A second pattern generator that outputs a set value according to the pattern D in accordance with the following, a second power supply device that outputs a current or a voltage according to the set value output from the second pattern generator,
An emission device which is energized by an output from the second power supply device and emits a beam, a third pattern switching signal generating means for generating a pattern switching signal at a predetermined timing, and includes patterns E and F in advance. Holding a third operation pattern, outputting a set value corresponding to the pattern E in accordance with a clock output from the pulse generator;
A third pattern generator that outputs a set value corresponding to the pattern F in accordance with a clock output from the pulse generator when a pattern switching signal is input from the pattern switching signal generating means; A third power supply device that outputs a voltage according to the output set value;
A high-frequency acceleration system for accelerating the beam with an output voltage from the third power supply device.

According to a seventh aspect of the present invention, in the accelerator system, the first pattern switching signal generating means generates a pattern switching signal when a clock output from the pulse generator is counted and reaches a predetermined value. This is a counter circuit.

According to an eighth aspect of the present invention, in the accelerator system, the first pattern switching signal generating means is a timer circuit which generates a pattern switching signal when a time is measured and reaches a predetermined value.

An accelerator system according to a ninth aspect of the present invention includes a pulse generator for generating a clock having a predetermined period;
First hold signal generation means for generating a hold signal at a predetermined timing, and a first operation pattern held in advance, and a set value corresponding to the first operation pattern is set according to a clock output from the pulse generator. Output, and the hold signal from the first hold signal generating means is turned on.
In the case of (1), the set value output by the previous clock is held as it is, and when the hold signal from the first hold signal generation means is OFF, the set value is output according to the continuation of the first operation pattern. A pattern generator, a first power supply device that outputs a current according to a set value output from the first pattern generator,
And an electromagnet that is excited by an output current from the power supply device to generate a magnetic field.

According to a tenth aspect of the present invention, there is provided an accelerator system for generating a hold signal at a predetermined timing.
Hold signal generation means, and holds a second operation pattern in advance, and outputs a set value according to the second operation pattern according to a clock output from the pulse generator;
When the hold signal from the second hold signal generation means is ON, zero is output as a set value, and when the hold signal from the second hold signal generation means is OFF, the set value is output according to the second operation pattern. A second power generator that outputs a current or a voltage in accordance with a set value output from the second power generator, and a second power generator that outputs a current or a voltage according to a set value output from the second power generator. An emitting device that emits a beam when energized, a third hold signal generating unit that generates a hold signal at a predetermined timing, and a third operation pattern that is held in advance and that is operated in accordance with a clock output from the pulse generator. A set value according to the third operation pattern is output, and when the hold signal from the third hold signal generating means is ON, the set value is output at the previous clock. The value held as it is, the hold signal from the third hold signal generating means is OFF
A third pattern generator that outputs a set value in accordance with the continuation of the third operation pattern;
A third power supply device that outputs a voltage according to the set value output from the pattern generator, and a high-frequency acceleration system that accelerates the beam with an output voltage from the third power supply device. is there.

12. The accelerator system according to claim 11, wherein said first hold signal generating means counts a clock output from said pulse generator and generates a hold signal when the count reaches a predetermined value. It is what it was.

In the accelerator system according to a twelfth aspect of the present invention, the first hold signal generating means is a timer circuit that measures a time and generates a hold signal when a predetermined value is reached.

An accelerator system according to a thirteenth aspect of the present invention further comprises a respiratory synchronization signal generator for generating a respiration gate signal indicating synchronization of respiration of a patient, wherein each of the clock cutoff means and each of the pattern switching signal generation means is provided. , A second signal corresponding to each of the hold signal generation means or the emission device.
Is operated in synchronization with the respiration gate signal.

[0033]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 An accelerator system according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an accelerator system according to Embodiment 1 of the present invention. In the drawings, the same reference numerals indicate the same or corresponding parts.

In FIG. 1, 1 is a pulse generator for generating a clock, 2a to 2c are counter circuits for counting the clock output from the pulse generator 1 and outputting the result, and 3a to 3c are from the pulse generator 1. The gate logic circuits 4a to 4c cut off the output clocks according to the outputs from the counter circuits 2a to 2c according to the patterns set in advance according to the clocks output from the gate logic circuits 3a to 3c. A pattern generator for outputting a set value, and 5a to 5c are pattern generators 4a
A power supply device that outputs a current or a voltage according to a set value (pattern) output from the power supply device 4c; a synchrotron electromagnet 6 which is excited by an output current from the power supply device 5a; The emitting device 8 to be excited is a high-frequency acceleration system for accelerating the beam with the output voltage from the power supply 5c.

Next, the operation of the accelerator system according to the first embodiment will be described with reference to the drawings. FIG. 2 is a timing chart showing the operation of the accelerator system according to Embodiment 1 of the present invention.

First, the pulse generator 1 generates a clock at a predetermined cycle. Here, the period is, for example, 1440H obtained by dividing the frequency of 60 Hz of the commercial power supply by 1/24.
z. Further, here, the synchrotron electromagnet 6 and the emitting device 7 are operated at the above-mentioned 1440 Hz, and the high-frequency acceleration system 8 requires a higher frequency clock, so that the frequency is set to 50 kHz.

For the subsequent operation, first, the synchrotron electromagnet 6 will be described. The 1440 Hz clock output from the pulse generator 1 is input to the counter circuit 2a and the gate logic circuit 3a, and the gate logic circuit 3a passes the 1440 Hz clock as it is when there is no output from the counter circuit 2a to generate a pattern. Output to the container 4a.

During this time, the counter circuit 2a counts the clock until it reaches a predetermined count number set in advance. Here, the predetermined count number is the number of clocks from the start of the pattern until the pattern can be emitted, and is set corresponding to the pattern stored in the pattern generator 4a.

The pattern generator 4a outputs a pattern set in advance corresponding to the clock output from the gate logic circuit 3a as a set value. Power supply 5
a outputs a current corresponding to the set value output from the pattern generator 4a, and energizes the synchrotron electromagnet 6,
A predetermined excitation is performed.

In this manner, the synchrotron electromagnet 6
, An exciting current corresponding to the set pattern is supplied to generate a predetermined magnetic field.

Next, when the count number set in the counter circuit 2a, that is, at the point of the emission possible D, the counter circuit 2a outputs a clock cutoff signal to the gate logic circuit 3a, and the gate logic circuit 3a The clock output to the device 4a is stopped.

Since the input of the clock is interrupted, the pattern generator 4a holds the set value output in the previous clock as it is, and a constant exciting current is applied to the synchrotron electromagnet 6 so that a constant magnetic field is applied. Occurs.

The counter circuit 2a newly counts the clock after counting up the emission possible D, and when the count reaches a preset count, the gate logic circuit 3a
Is turned off, and the clock output of the gate logic circuit 3a is restarted.

When the electromagnet clock output from the gate logic circuit 3a is restarted, the set value is output in accordance with the continuation of the pattern set in the pattern generator 4a, and the exciting current is supplied to the synchrotron electromagnet 6.

Next, the operation of the emitting device 7 will be described. The configuration of the function is the same as that of the synchrotron electromagnet 6, except that the output of the counter circuit 2b is also input to the pattern generator 4b, and the operation of the counter circuit 2b is different.

The counter circuit 2b outputs a clock cutoff signal from the start of the pattern by the master signal.
At the same time when the output device clock output from the gate logic circuit 3b stops, a clock cutoff signal is also input to the pattern generator 4b, and the pattern generator 4b operates so that the output becomes 0 in response to the input of the clock cutoff signal.
Thereby, the set value of 0 is given to the power supply device 5b,
As a result, the output device 7 is not energized.

Next, the counter circuit 2b turns off the clock cutoff signal when counting the number of counts up to the position of the emission enable D. As a result, the emission device clock is output from the gate logic circuit 3b and input to the pattern generator 4b.

The pattern generator 4b outputs a set value according to a preset pattern to the power supply 5b, and the power supply 5b outputs a current or a voltage corresponding to the set value to the emitting device 7. In this way, the emission possible D
A predetermined current or voltage is applied to the emitting device 7 at the portion, and a beam is emitted.

After turning off the clock cutoff signal, the counter circuit 2b newly counts the clock, and outputs a clock cutoff signal when the count reaches the preset count of the emission possible time D. This clock cutoff signal is input to the gate logic circuit 3b, which stops the output of the emission device clock and the pattern generator 4b.
b, and operates so that the output becomes 0 as described above. This state is maintained until the end of the pattern.

Next, the operation of the high frequency acceleration system 8 is the same as that of the synchrotron electromagnet 6, except that the frequency of the clock is different.

FIG. 2 shows a time chart when the above operation is performed. FIG. 2 shows (a) a magnetic field of a bending electromagnet as an example of a synchrotron electromagnet, (b) a master signal, (c) an electromagnet clock, (d) a magnetic field of an emitting device,
(E) Operation of the emission device clock and (f) beam current.

Here, the operation of the high-frequency acceleration system clock is omitted because it is the same as the electromagnet clock except for the frequency of the clock. The operation of the magnetic field of the bending electromagnet and the operation of the magnetic field of the output device are exactly the same as those in FIG. 14 of the prior art, but the operations of the electromagnet clock shown in FIG. 2C and the output device clock shown in FIG. Are different.

The electromagnet clock is stopped at the portion where the emission is possible D, and the emission device clock is stopped at the portion other than the emission possible D. Therefore, for a pattern created in advance, only the portion where the clock is operating needs to be created.

In the case of changing the time of the emission possible D which is the object of the present invention, it is not necessary to change this pattern.
Since it is only necessary to change the count number corresponding to the time of the emission possible D in the counter circuits 2a to 2c, it is possible to eliminate the pattern creation time and adjustment work for confirmation, and greatly reduce the time required for the change. Things are possible. Further, since the required pattern is also shortened, the number of memories for storing the pattern can be reduced, and the cost can be reduced.

Embodiment 2 Embodiment 2 An accelerator system according to Embodiment 2 of the present invention will be described with reference to the drawings. FIG. 3 is a block diagram showing a configuration of an accelerator system according to Embodiment 2 of the present invention.

In the first embodiment, the counter circuit 2a
Although the clock is stopped at the emission enabled D by the clock count operation in ~ 2c, the same operation can be obtained by performing the operation with the timer circuit.

In FIG. 3, reference numerals 9a to 9c denote timer circuits for outputting a clock cutoff signal in accordance with a preset time. Other components are the same as those of the first embodiment shown in FIG.

Next, the operation of the accelerator system according to the second embodiment will be described with reference to the drawings.

In FIG. 3, a clock is output from the pulse generator 1, and the synchrotron electromagnet 6, the emission device 7, and the high-frequency wave are transmitted through the gate logic circuits 3a to 3c, the pattern generators 4a to 4c, and the power supply devices 5a to 5c. The operation of energizing each of the acceleration systems 8 is the same as in the first embodiment.

The difference from the first embodiment is that timer circuits 9a to 9c are provided instead of counter circuits 2a to 2c.

The timer circuits 9a to 9c operate in the same manner as the operation of the counter circuits 2a to 2c in the first embodiment, and start from the start by the master signal and set a preset emission enable D
Until the set time is reached, and outputs a clock cutoff signal. After the clock cutoff signal is output, a new time measurement is started, and when the preset time of the emission possible D is reached, the clock cutoff signal is turned off.

As described above, the same effects can be obtained by replacing the counter circuits 2a to 2c in the first embodiment with the timer circuits 9a to 9c. Further, by using the timer circuits 9a to 9c, the device can be simplified, and the cost can be reduced.

Embodiment 3 Embodiment 3 An accelerator system according to Embodiment 3 of the present invention will be described with reference to the drawings. FIG. 4 is a block diagram showing a configuration of an accelerator system according to Embodiment 3 of the present invention.

In the first embodiment, the case where the clock is stopped by the gate logic circuits 3a to 3c has been described.
The same operation can be obtained even when switching is performed by a pattern switching signal from .about.2c.

In FIG. 4, the components are the same as in FIG. 1, except that the outputs from the counter circuits 2a to 2c are directly input to the pattern generators 4a to 4c without providing a gate logic circuit. .

Next, the operation of the accelerator system according to the third embodiment will be described with reference to the drawings. FIG. 5 is a diagram showing a pattern configuration of an accelerator system according to Embodiment 3 of the present invention. FIG. 6 is a timing chart showing the operation of the accelerator system according to Embodiment 3 of the present invention.

First, in the case of the synchrotron electromagnet 6, the clock output from the pulse generator 1 in FIG. 4 is input to the counter circuit 2a and at the same time to the pattern generator 4a.

The pattern generator 4a stores two types of patterns, pattern A and pattern B, in advance. FIGS. 5A and 5B show examples of patterns.
A case of a bending electromagnet is shown as an example of an electromagnet of a synchrotron. Pattern A can be emitted from the start of the pattern D
Create up to the part. Here, as for the length of the emission possible D, a length equal to or longer than the longest time required by the system is created. The pattern B is created from the end of the emission possible D to the end of the pattern.

When a clock is input to the pattern generator 4a, a set value is output to the power supply 5a in accordance with a preset pattern A. The power supply 5a supplies an exciting current according to the input set value to the synchrotron electromagnet 6 to generate a predetermined magnetic field. In this way, the excitation pattern from the start of the pattern to the emission enable D set in the pattern A is executed.

When the counter circuit 2a counts the number of clocks corresponding to the time from the start of the pattern by the master signal to the end of the emission enable D, it outputs a pattern switching signal to the pattern generator 4a.

When a pattern switching signal is input, the pattern generator 4 a outputs a set value corresponding to the pattern B to the power supply 5 a by the clock input from the pulse generator 1, and the power supply 5 a sends the set value to the synchrotron electromagnet 6. Energize the excitation current. Thus, the pattern B is set,
The excitation pattern from the end of the emission possible D to the end of the pattern is executed.

The same operation is performed for the high-frequency acceleration system 8 except that the frequency of the clock is high.

Next, the operation of the emitting device 7 will be described. The emission device 7 is characterized in that the pattern switching signal is executed three times. Pattern generator 4
There are two types of patterns stored in b, as in the case of the synchrotron electromagnet 6, but as shown in FIGS. 5C and 5D, the excitation pattern when the pattern C does not emit a beam, and the pattern D Is created as an excitation pattern in the emission possible D. Here, as for the length of the pattern D, at least the maximum time in the emission possible D required by the system is created.

As in the case of the synchrotron electromagnet 6,
In response to the clock from the pulse generator 1, the pattern generator 4b outputs a set value corresponding to the pattern C to the power supply device 5b, and the power supply device 5b outputs an excitation current corresponding to the set value to the emission device 7. In this way, the pattern C is output for the part that does not emit light.

When the counter circuit 2b counts the number of clocks corresponding to the time from the start of the pattern by the master signal to the start of the emission enable D, it outputs a pattern switching signal to the pattern generator 4b. When a pattern switching signal is input, the pattern generator 4b operates to output a set value corresponding to the pattern D in response to a clock input.
The beam is emitted in this manner.

After outputting the pattern switching signal, the counter circuit 2b starts counting again, and then turns off the pattern switching signal when it counts the number of clocks corresponding to the time of the emission enable D. Then, the pattern generator 4
b outputs a set value corresponding to the pattern C, and the beam is cut off.

FIG. 6 shows a time chart in such an operation. The figure shows (a) a bending electromagnet magnetic field as an example of a synchrotron electromagnet, (b) a master signal, (c) an electromagnet pattern switching signal, (d) an emitting device magnetic field, (e) an emitting device pattern switching signal, and (f). 3) shows the operation of the beam current.

As shown in FIG. 6C, in the case of the bending electromagnet, the pattern switching signal is set to O in the portions of deceleration preparation E and deceleration F.
N, and the pattern D is executed during this period.

As shown in FIG. 6 (e), in the case of the emitting device, the pattern switching signal is O
It becomes N, an emission operation is performed, and a beam is emitted.

In the case of the third embodiment as well, the counter circuits 2a to 2c
It is possible only by changing the number of clocks corresponding to the emission possible D among the number of clocks counted by.

The same effect as in the first embodiment can be obtained even if the plurality of patterns are switched in the pattern generators 4a to 4c. Further, by omitting the gate logic circuit, the device can be simplified, and the cost can be reduced.

Embodiment 4 Embodiment 4 An accelerator system according to Embodiment 4 of the present invention will be described with reference to the drawings. FIG. 7 is a block diagram showing a configuration of an accelerator system according to Embodiment 4 of the present invention.

In the third embodiment, the counter circuit 2a
Although the pattern switching operation is performed by the clock counting operation in ~ 2c, the same operation can be obtained by performing the same in the timer circuit.

In FIG. 7, reference numerals 9a to 9c are the same as those of the timer circuit shown in FIG.
It is similar to that shown in FIG.

Next, the operation of the accelerator system according to the fourth embodiment will be described with reference to the drawings.

In FIG. 7, a clock is output from the pulse generator 1, and the pattern generators 4a to 4c and the power supply 5
The operation of energizing each of the synchrotron electromagnet 6, the emitting device 7, and the high-frequency acceleration system 8 via a to 5c is the same as in the third embodiment.

The difference from the third embodiment is that timer circuits 9a to 9c are provided instead of counter circuits 2a to 2c.

Similarly to the operation of the counter circuits 2a to 2c in the third embodiment, the timer circuits 9a to 9c operate from the start by the master signal to the preset start time of the emission enabled D or the end of the emission enabled D. Is measured, and when the set time is reached, a pattern switching signal is output. For the emission device, after outputting the pattern switching signal, the time measurement is newly started, and when the preset emission time D is reached, the pattern switching signal is turned off.
Change to F.

As described above, the same effect can be obtained by replacing the counter circuits 2a to 2c in the third embodiment with the timer circuits 9a to 9c. Further, by using a timer circuit, the device can be further simplified, and the cost can be reduced.

Embodiment 5 An accelerator system according to Embodiment 5 of the present invention will be described with reference to the drawings. FIG. 8 is a block diagram showing a configuration of an accelerator system according to Embodiment 5 of the present invention.

In the first embodiment, the case where the clock is stopped by the gate logic circuits 3a to 3c has been described, but the same operation can be obtained even if the pattern is held by the pattern generators 4a to 4c. Is possible.

In FIG. 8, each component is the same as in FIG.

Next, the operation of the accelerator system according to the fifth embodiment will be described with reference to the drawings. FIG. 9 is a timing chart showing an operation of the accelerator system according to Embodiment 5 of the present invention.

First, in the case of the synchrotron electromagnet 6, in FIG. 8, the clock output from the pulse generator 1 is input to the counter circuit 2a and at the same time to the pattern generator 4a. When a clock is input, the pattern generator 4a outputs a set value to the power supply 5a according to a preset pattern. Power supply 5a
Supplies an exciting current according to the input set value to the synchrotron electromagnet 6 to generate a predetermined magnetic field.

When the counter circuit 2a counts the number of clocks corresponding to the time from the start of the pattern by the master signal to the start of the emission enable D, it outputs a hold signal to the pattern generator 5a. Upon receiving the hold signal, the pattern generator 4a holds the pattern at that point without advancing the pattern even if there is a clock input from the pulse generator 1.

After outputting the hold signal, the counter circuit 2a newly starts counting the clocks, and turns off the hold signal when the number of clocks corresponding to the preset time of the emission enable D is counted. Accordingly, the pattern output operation of the pattern generator 4a is restarted, and the patterns of the deceleration preparation E and the deceleration F portion are executed.

The same operation is performed for the high-frequency acceleration system 8 except that the clock frequency is high.

Next, the operation of the emitting device 7 will be described. In the case of the emitting device 7, a hold signal can be emitted.
The pattern generator 4b is different from the synchrotron electromagnet 6 in that the output is set to 0 or a preset value when the hold signal is input.

The counter circuit 2b outputs a hold signal when the pattern is started by the master signal, the pattern generator 4b outputs 0 when the hold signal is input, and the output device 7 is excited. No current is passed.

When the counter circuit 2b counts the number of clocks corresponding to the time from the start of the pattern by the master signal to the start of the emission enable D, it turns off the hold signal. The pattern generator 4b outputs a pattern (set value) according to the clock input when the hold signal is turned off, and the emission device 7 is excited. In this way, the beam is emitted.

The counter circuit 2b outputs the hold signal to the OF signal.
After setting the count to F, a new count is started, and when the number of clocks corresponding to the time of the emission enable D is counted, a hold signal is output. Thereby, the pattern generator 4b
Becomes 0, the excitation of the emission device 7 is cut off, and the beam is cut off.

FIG. 9 shows a time chart of such an operation. The figure shows (a) a bending magnet magnetic field as an example of a synchrotron electromagnet, (b) a master signal, (c) an electromagnet hold signal, (d) an emission device magnetic field, (e) an emission device hold signal, and (f) a beam. The current operation is shown.

As shown in FIG. 9C, in the case of a bending electromagnet, the hold signal is turned ON at the portion where the light can be emitted, and
During this period, the value of the pattern is held and constant excitation is performed.

Further, as shown in FIG. 9E, in the case of the emitting device, the hold signal is turned on in a portion other than the emitting enable D.
The operation is performed such that the exciting current becomes 0 in order to cut off the beam. The hold signal is turned off in the portion where the light can be emitted D, and the emission operation created by the pattern is performed, and the beam is emitted.

Also in the case of the fifth embodiment, the counter circuits 2a to 2
It is possible only by changing the number of clocks corresponding to the emission possible D among the number of clocks counted by c.

As described above, even when the output is held in the pattern generators 4a to 4c, the same effect as in the first embodiment can be obtained. Further, by omitting the gate logic circuit, the device can be simplified, and the cost can be reduced.

Embodiment 6 FIG. Embodiment 6 An accelerator system according to Embodiment 6 of the present invention will be described with reference to the drawings. FIG. 10 is a block diagram showing a configuration of an accelerator system according to Embodiment 6 of the present invention.

In the fifth embodiment, the counter circuit 2a
Although the pattern switching operation is performed by the clock counting operation in ~ 2c, the same operation can be obtained by performing the same in the timer circuit.

In FIG. 10, 9a to 9c are the same as those of the timer circuit shown in FIG. 3, and the other components are the same as those shown in FIG.

Next, the operation of the accelerator system according to the sixth embodiment will be described with reference to the drawings.

In FIG. 10, a clock is output from the pulse generator 1 and is supplied to the synchrotron electromagnet 6, the emitting device 7, and the high-frequency acceleration system 8 via the pattern generators 4a to 4c and the power supply devices 5a to 5c. The operation is the same as in the fifth embodiment.

The difference from the fifth embodiment is that timer circuits 9a to 9c are provided instead of counter circuits 2a to 2c.

The timer circuits 9a to 9c measure the time from the start by the master signal to the start of the preset emission enable D, similarly to the operation of the counter circuits 2a to 2c in the fifth embodiment. When the specified time is reached, a hold signal is output. After holding signal output,
A new time measurement is started, and when the preset emission time D is reached, the hold signal is turned off.

As for the emission device 7, the O of the hold signal
The N / OFF operation is reversed, and only the portion where emission is possible D is excited by the pattern, and the beam is emitted.

As described above, the same effect can be obtained by replacing the counter circuits 2a to 2c in the fifth embodiment with the timer circuits 9a to 9c. Further, by using a timer circuit, the device can be further simplified, and the cost can be reduced.

Embodiment 7 FIG. Embodiment 7 An accelerator system according to Embodiment 7 of the present invention will be described with reference to the drawings. FIG. 11 is a block diagram showing a configuration of an accelerator system according to Embodiment 7 of the present invention.

In the first to sixth embodiments, the effect of reducing the time required for pattern creation and adjustment when changing the time of the emission possible D is obtained. However, the emission possible D can be varied. In the case of a medical accelerator system that applies the above, it is also possible to improve the irradiation efficiency by performing operation synchronized with the patient's breathing.

The accelerator system shown in FIG. 11 is obtained by adding a function of synchronizing with the patient's breathing to the first embodiment.

In FIG. 11, reference numerals 6a to 6d denote four bending electromagnets, 7a to 7d are emission devices, 10 is a respiratory synchronization signal generator for detecting a patient's respiration, and 100 is an injector for generating a beam and performing preliminary acceleration. , 101a and 101b are low-energy beam transport system deflection electromagnets for deflecting a beam according to a beam line in the low energy beam transport system;
102 is a synchrotron for accelerating the beam, 103
Reference numerals a and 103b denote a high-energy beam transport system deflection electromagnet for deflecting a beam according to a beam line in the high-energy beam transport system, and 104 denotes an irradiation device for irradiating the beam to a patient. Other components are the same as those in FIG.

Next, the operation of the accelerator system according to the seventh embodiment will be described with reference to the drawings. FIG. 12 is a timing chart showing the operation of the accelerator system according to Embodiment 7 of the present invention.

First, the beam flow will be described. The beam generated and pre-accelerated by the injector 100 is deflected according to the beam line by the low-energy beam transport system deflection electromagnets 101a and 101b, and is incident on the synchrotron 102.

The beam incident on the synchrotron 102 is accelerated to a predetermined energy according to the above-mentioned operation pattern, and thereafter emitted by the emitting devices 7a to 7d, and transported to the high energy beam transport system. In the high energy beam transport system, the high energy beam transport system bending electromagnet 1
The light is deflected by 03a and 103b in accordance with the beam line, is shaped into a predetermined beam shape by the irradiation device 104, and is irradiated on the patient.

Next, the operation of the control block will be described. First, the clock output from the pulse generator 1 is input to the counter circuits 2a and 2b, and is also input to the gate logic circuits 3a and 3b at the same time.

The gate logic circuit 3a corresponding to the synchrotron electromagnet 6a outputs a clock to the pattern generator 4a because the clock cutoff signal from the counter circuit 2a is not output. Pattern generator 4a
Outputs a set value to the power supply 5a according to a preset pattern when a clock is input. The power supply device 5a supplies an exciting current according to the input set value to the synchrotron electromagnet 6a to generate a predetermined magnetic field.

When the counter circuit 2a counts the number of clocks corresponding to the time from the start of the pattern by the preset master signal to the start of the emission enable D, it outputs a clock cutoff signal to the gate logic circuit 3a. When a gate cutoff signal is input, the gate logic circuit 3a holds the signal at that point without advancing the pattern even if there is a clock input from the pulse generator 1.

Counter circuit 2b corresponding to emission device 7a
In the case of (1), the clock cutoff signal is output at the start of the pattern, and the gate logic circuit 3b does not output the clock to the pattern generator 4b. The clock cutoff signal is also input to the pattern generator 4b, and the pattern generator 4b operates so that the output becomes zero. Therefore, in this state, no exciting current is supplied to the emitting device 7.

When the counter circuit 2b counts the number of clocks corresponding to the time from the start of the pattern by the preset master signal to the start of the emission enable D, the counter circuit 2b turns off the clock cutoff signal and sends the clock to the pattern generator 4b. Output.

In this way, the state is set to the emission possible state D, but if the respiration gate signal indicating the synchronization of the patient's respiration is not output from the respiration synchronization signal generator 10, the gate logic circuit 3b does not output the clock. When the patient's respiration is in a predetermined state and the beam can be irradiated, the respiration synchronization signal generator 10 outputs a respiration gate signal.

The respiration gate signal is supplied to the counter circuits 2a, 2a
b, the gate logic circuits 3a and 3b and the pattern generator 4b. First, the gate logic circuit 3b
A clock is output to the pattern generator 4b in response to the input of the respiration gate signal, and the pattern generator 4b outputs a set value to the power supply device 5b according to a preset pattern by inputting the clock and turning on the respiration gate signal.

The power supply 5b supplies an exciting current to the emitting device 7a in accordance with the set value, and emits a beam. The emitted beam is transported by a device of a high energy beam transport system, and is irradiated to a patient via the irradiation device 104. Therefore, the beam is emitted when the affected part to be irradiated is at a predetermined position depending on the respiratory state of the patient.

The gate logic circuits 3a and 3b are either the longest time of the dischargeable D counted by the counter circuits 2a and 2b, the longest time of actual emission, or the turning off of the respiration gate signal. In this state, the operation shifts to deceleration preparation E and deceleration F operations.

The bending electromagnet 6a is connected to the gate logic circuit 3
a restarts the clock output to prepare for deceleration E and deceleration F
The emission device 7a cuts off the beam when the gate logic circuit 3b cuts off the clock and the pattern generator 4b turns the output to 0.

Next, when the pattern is completed, the master signal is immediately transmitted regardless of the state of breathing to start the pattern, and the same operation as described above is executed.

As described above, the pattern is executed irrespective of the patient's breathing, the beam is held in the state where the beam can be emitted and the respiration gate signal is waited for, and the beam is emitted by the ON of the breathing gate signal. It is possible to perform an operation of ending the pattern under any of the conditions of time, the longest time of emission, and turning off the breathing gate, and immediately start the pattern.

Although not described here, the same operation as that of a synchrotron electromagnet such as a bending electromagnet is also performed in a high-frequency acceleration system.

FIG. 12 is a time chart of such an operation.
Shown in The figure shows (a) a patient's respiration curve, (b) a respiration gate signal, (c) a bending magnet magnetic field as an example of a synchrotron electromagnet, (d) a master signal, (e) an electromagnet clock, and (f) an emission device. Magnetic field, (g) output device clock,
(H) shows the operation of the beam current.

As shown in FIGS. 12A and 12B, breathing is not performed at a constant cycle. Therefore, it can be seen that the respiration gate signal also has no periodicity.

The operation of the accelerator system corresponding to this will be described. First, in the pattern AA shown in FIG. 12C, the beam is immediately emitted because the respiration gate signal is already ON when the state becomes the emission possible D. In this case, the pattern shifts to the end of the pattern when the predetermined emission time comes. Thereafter, the pattern is immediately started by the master signal.

The operation of pattern BB is similar to that of pattern AA.

Next, in the case of the pattern CC, since the respiratory gate signal is OFF at the time of the emission possible D state, the electromagnet clock and the emission device clock are stopped in the emission possible D state and the pattern is stopped. Is holding. When the respiratory gate signal is turned ON, emission is performed from that point in time, and the emission time becomes a specified emission time, and the pattern shifts to the end.

The pattern DD is the same as the patterns AA and BB. The operation of the pattern EE is the same as that of the pattern CC.

Next, in the case of the pattern FF, the beam is emitted immediately because the respiration gate is ON when the state becomes the emission possible D, and the pattern AA,
Same as BB and DD, but the respiration gate signal is turned off before the specified emission time, whereby the emission ends and the pattern shifts.

FIG. 12 shows a case where the breathing is long with respect to the operation pattern of the accelerator. However, if the cycle is equal to or longer than the cycle of the operation pattern of the accelerator, at least one irradiation is performed with one breath. Things are possible. Here, the operation pattern of the accelerator is generally often operated in about 1.5 seconds, which is sufficiently fast as compared with the respiratory cycle, so that there is no problem.

As described above, in the case of the respiratory-synchronous operation in the medical accelerator system, at least one irradiation can be performed in one breath by changing the time of the dischargeable D, thereby improving the irradiation efficiency. It is possible to do.

In the seventh embodiment, the function of detecting and synchronizing respiration is added to the first embodiment, but the same effect can be obtained by adding the function to the second to sixth embodiments. It is.

In the above-described first to sixth embodiments and the seventh embodiment, ON and OFF of each signal are only described for easy understanding, so from the viewpoint of fail-safe and the like. The same effect can be obtained by reversing the logic of ON and OFF.

[0147]

As described above, the accelerator system according to claim 1 of the present invention stops the clock output from the pulse generator at a predetermined timing with the pulse generator generating the clock of the predetermined period. Or the first to pass
The first clock cut-off means and the first operation pattern are held in advance, and a set value corresponding to the first operation pattern is output in accordance with the clock output from the first clock cut-off means. When the clock input from the means is interrupted, the set value output by the previous clock is held as it is, and when the clock input from the first clock cutoff means is restarted, the set value is set according to the continuation of the first operation pattern. A first power generator that outputs a current according to a set value output from the first pattern generator, and an excitation using an output current from the first power generator. Since it is equipped with an electromagnet that generates a magnetic field, there is no need to create or modify the operation pattern when changing the emission possible time, and the work at the time of change can be simplified. It can also be omitted adjustment of the system with the creation of the pattern, an effect that can flexibly be corresponding to the emission possible time changes by condition change of the irradiation.

As described above, the accelerator system according to claim 2 of the present invention stops or passes the clock output from the pulse generator at a predetermined timing, and turns on or off the cutoff signal at the predetermined timing. The second operation pattern is held in advance, and a set value corresponding to the second operation pattern is output according to the clock output from the second clock interruption means. When the cutoff signal from the means is ON, a second value is output as a set value, and when the cutoff signal from the second clock cutoff means is OFF, a second pattern is generated which outputs a set value according to the second operation pattern. A second power supply device for outputting a current or a voltage according to a set value output from the second pattern generator;
An emission device that is energized by an output from the second power supply device and emits a beam; a third clock cutoff unit that stops or passes a clock output from the pulse generator at a predetermined timing; Holding the driving pattern of
A set value corresponding to the third operation pattern is output according to the clock output from the third clock cutoff means, and when the clock input from the third clock cutoff means is interrupted, the set value output by the previous clock is output. A third pattern generator that outputs a set value in accordance with the continuation of the third operation pattern when the clock input from the third clock cut-off means is restarted; and A third power supply device for outputting a voltage according to the set value output from the generator; and a high-frequency acceleration system for accelerating the beam with an output voltage from the third power supply device, so that light can be emitted. When changing the time, there is no need to create or modify the driving pattern,
The operation at the time of change can be simplified, the adjustment of the system accompanying the creation of the pattern can be omitted, and the effect of flexibly coping with the change of the emission available time due to the change of the irradiation condition can be obtained.

In the accelerator system according to a third aspect of the present invention, as described above, the first clock cutoff means counts the clock output from the pulse generator and sets the first or second predetermined value. Turns OFF when reaching
Or a gate circuit that stops or passes a clock output from the pulse generator in accordance with ON or OFF of a cutoff signal from the counter circuit, so that the emission time is changed. There is no need to create or modify the operation pattern, which simplifies the work at the time of change, and also eliminates the need to adjust the system associated with the pattern creation, making it possible to flexibly change the emission time by changing the irradiation conditions. This has the effect of being able to respond.

As described above, in the accelerator system according to claim 4 of the present invention, when the first clock cutoff means measures time and reaches a first or second predetermined value, it turns ON or OFF the cutoff signal. A timer circuit that is turned off, and a gate logic circuit that stops or passes a clock output from the pulse generator in accordance with ON or OFF of a cutoff signal from the timer circuit. There is no need to create or modify the operation pattern, simplifying the work at the time of change, omitting the adjustment of the system accompanying the creation of the pattern, and flexibly responding to the change of the emission time by changing the irradiation conditions It has the effect that it can be done.

As described above, the accelerator system according to claim 5 of the present invention comprises a pulse generator for generating a clock having a predetermined cycle and a first pattern switching signal generating for generating a pattern switching signal at a predetermined timing. Means for holding a first operation pattern composed of patterns A and B in advance, outputting a set value according to the pattern A in accordance with a clock output from the pulse generator, and outputting the first pattern switching signal A first pattern generator that outputs a set value according to the pattern B in accordance with a clock output from the pulse generator when a pattern switching signal is input from the generator, and a setting output from the first pattern generator A first power supply device that outputs a current according to a value, and an electromagnet that generates a magnetic field when excited by an output current from the first power supply device Since there is no need to create or modify an operation pattern when changing the emission possible time, the operation at the time of change can be simplified, and adjustment of the system accompanying the pattern creation can be omitted, and irradiation can be performed. This makes it possible to flexibly cope with a change in the emission available time due to the above condition change.

As described above, the accelerator system according to claim 6 of the present invention comprises a second pattern switching signal generating means for generating a pattern switching signal at a predetermined timing, and a second pattern switching signal generating means comprising patterns C and D in advance. 2, and outputs a set value corresponding to the pattern C according to the clock output from the pulse generator.
A second pattern generator that outputs a set value according to the pattern D in accordance with a clock output from the pulse generator when a pattern switching signal is input from the second pattern switching signal generating means; A second power supply for outputting a current or a voltage in accordance with a set value output from the generator, an emitting device for supplying a current and outputting a beam when output from the second power supply, and a pattern at a predetermined timing; A third pattern switching signal generating means for generating a switching signal, and a third operation pattern composed of patterns E and F held in advance, and a setting corresponding to the pattern E according to a clock output from the pulse generator. A clock output from the pulse generator when a value is output and a pattern switching signal is input from the third pattern switching signal generating means. Therefore, a third pattern generator that outputs a set value according to the pattern F, a third power supply device that outputs a voltage according to the set value output from the third pattern generator, and And a high-frequency acceleration system for accelerating the beam with the output voltage from the power supply device, so that there is no need to create or modify an operation pattern when changing the emission possible time, simplifying the work at the time of change. In addition, it is possible to omit the adjustment of the system accompanying the creation of the pattern, and it is possible to flexibly cope with the change of the emission available time due to the change of the irradiation condition.

As described above, in the accelerator system according to claim 7 of the present invention, the first pattern switching signal generating means counts the clock output from the pulse generator and sets the pattern when the clock reaches a predetermined value. Since it is a counter circuit that generates a switching signal, there is no need to create or modify the operation pattern when changing the emission possible time, which simplifies the work at the time of change, and the system that accompanies the pattern creation. Adjustment can also be omitted, and there is an effect that it is possible to flexibly cope with a change in time during which light can be emitted due to a change in irradiation conditions.

As described above, in the accelerator system according to claim 8 of the present invention, the first pattern switching signal generating means includes a timer circuit for generating a pattern switching signal when a time is measured and a predetermined value is reached. Therefore, there is no need to create or modify the operation pattern when changing the emission possible time, simplifying the work at the time of change, and omitting the adjustment of the system accompanying the pattern creation, and the irradiation conditions. This has the effect that it is possible to flexibly cope with a change in the emission available time due to the change.

As described above, the accelerator system according to the ninth aspect of the present invention comprises a pulse generator for generating a clock having a predetermined cycle, and a first hold signal generating means for generating a hold signal at a predetermined timing. Holding a first operation pattern in advance, outputting a set value according to the first operation pattern according to a clock output from the pulse generator, and turning on a hold signal from the first hold signal generation means. In the case of (1), the set value output by the previous clock is held as it is, and when the hold signal from the first hold signal generation means is OFF, the set value is output according to the continuation of the first operation pattern. A pattern generator, a first power supply device that outputs a current according to a set value output from the first pattern generator, And an electromagnet that generates a magnetic field when excited by an output current from the power supply device, so that there is no need to create or modify an operation pattern when changing the emission possible time, and the work at the time of change can be simplified. In addition, it is possible to omit the adjustment of the system accompanying the creation of the pattern, and it is possible to flexibly cope with the change of the emission available time due to the change of the irradiation condition.

As described above, the accelerator system according to the tenth aspect of the present invention comprises: a second hold signal generating means for generating a hold signal at a predetermined timing; A set value corresponding to the second operation pattern is output according to the clock output from the generator, and when the hold signal from the second hold signal generation means is ON, zero is output as the set value, and A second pattern generator for outputting a set value according to the second operation pattern when the hold signal from the second hold signal generation means is OFF;
A second power supply device that outputs a current or a voltage according to a set value output from the pattern generator, an emission device that is energized by the output from the second power supply device, and emits a beam, and a predetermined timing. Generate a hold signal at the third
Holding signal generating means and a third operation pattern in advance, and outputs a set value according to the third operation pattern according to a clock output from the pulse generator;
When the hold signal from the third hold signal generation means is ON, the set value output in the previous clock is held as it is, and when the hold signal from the third hold signal generation means is OFF, the third value is output. A third pattern generator that outputs a set value in accordance with a continuation of the operation pattern; a third power supply device that outputs a voltage according to the set value output from the third pattern generator; And a high-frequency acceleration system for accelerating the beam with the output voltage from the power supply device, so that there is no need to create or modify an operation pattern when changing the emission possible time, simplifying the work at the time of change. It is also possible to omit the adjustment of the system associated with the pattern creation, and to flexibly cope with the change of the emission available time due to the change of the irradiation conditions. That.

As described above, according to the accelerator system of the present invention, the first hold signal generating means counts the clock output from the pulse generator and outputs the hold signal when the count reaches a predetermined value. Since the counter circuit generates the time, it is not necessary to create or modify the operation pattern when changing the emission possible time, which simplifies the work at the time of change and adjusts the system accompanying the pattern creation. It is possible to omit it, and it is possible to flexibly cope with the change of the emission available time due to the change of the irradiation condition.

In the accelerator system according to the twelfth aspect of the present invention, as described above, the first hold signal generating means is a timer circuit which generates a hold signal when the time is measured and reaches a predetermined value. There is no need to create or modify the operation pattern when changing the emission possible time, which simplifies the work at the time of change, and also eliminates the need for system adjustments associated with pattern creation, and changes in irradiation conditions. There is an effect that it is possible to flexibly cope with a change in the time during which light can be emitted.

As described above, the accelerator system according to the thirteenth aspect of the present invention further comprises a respiratory synchronization signal generator for generating a respiration gate signal indicating the synchronization of respiration of a patient, wherein each of the clock cutoff means, Since the pattern switching signal generating means, the respective hold signal generating means, or the second pattern generator corresponding to the emission device operates in synchronization with the respiration gate signal, the respiratory irradiation is performed in synchronization with the patient's respiration. Irradiation can be performed reliably during the synchronous operation, and the effect of improving the irradiation efficiency can be achieved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an accelerator system according to Embodiment 1 of the present invention.

FIG. 2 is a timing chart showing an operation of the accelerator system according to Embodiment 1 of the present invention.

FIG. 3 is a block diagram showing a configuration of an accelerator system according to Embodiment 2 of the present invention.

FIG. 4 is a block diagram showing a configuration of an accelerator system according to Embodiment 3 of the present invention.

FIG. 5 is a diagram showing a pattern configuration of an accelerator system according to Embodiment 3 of the present invention.

FIG. 6 is a timing chart showing an operation of the accelerator system according to Embodiment 3 of the present invention.

FIG. 7 is a block diagram showing a configuration of an accelerator system according to Embodiment 4 of the present invention.

FIG. 8 is a block diagram showing a configuration of an accelerator system according to Embodiment 5 of the present invention.

FIG. 9 is a timing chart showing an operation of the accelerator system according to Embodiment 5 of the present invention.

FIG. 10 is a block diagram showing a configuration of an accelerator system according to Embodiment 6 of the present invention.

FIG. 11 is a block diagram showing a configuration of an accelerator system according to Embodiment 7 of the present invention.

FIG. 12 is a timing chart showing an operation of the accelerator system according to Embodiment 7 of the present invention.

FIG. 13 is a block diagram showing a configuration of a conventional accelerator system.

FIG. 14 is a timing chart showing the operation of a conventional accelerator system.

[Explanation of symbols]

1 pulse generator, 2a, 2b, 2c counter circuit,
3a, 3b, 3c gate logic circuits, 4a, 4b,
4c pattern generator, 5a, 5b, 5c power supply,
6, 6a, 6b, 6c, 6d synchrotron electromagnet,
7, 7a, 7b, 7c, 7d Emission device, 8 High-frequency acceleration system, 9a, 9b, 9c Timer circuit, 10 Respiratory synchronization signal generator, 100 Injector, 101a, 101b
Low energy beam transport system bending electromagnet, 102 synchrotron, 103a, 103b High energy beam transport system bending electromagnet, 104 Irradiation equipment.

Claims (13)

[Claims] 1. A pulse generator for generating a clock having a predetermined period, a first clock cutoff means for stopping or passing a clock output from the pulse generator at a predetermined timing, a first operation pattern And outputs a set value according to the first operation pattern in accordance with the clock output from the first clock cutoff means. When the clock input from the first clock cutoff means is interrupted, The output set value is held as it is, and the first
A first pattern generator that outputs a set value in accordance with the continuation of the first operation pattern when the clock input from the clock cutoff means is resumed; and a set value output from the first pattern generator. An accelerator system comprising: a first power supply device that outputs a current according to the following: and an electromagnet that is excited by an output current from the first power supply device and generates a magnetic field. 2. At a predetermined timing, while stopping or passing a clock output from the pulse generator,
A second clock cutoff unit for turning on or off a cutoff signal; and a second operation pattern held in advance, and a set value corresponding to the second operation pattern is set in accordance with a clock output from the second clock cutoff unit. When the cutoff signal from the second clock cutoff means is ON, zero is output as a set value, and when the cutoff signal from the second clock cutoff means is OFF, the set value is set according to the second operation pattern. A second pattern generator that outputs a value; a second power supply that outputs a current or a voltage according to a set value output from the second pattern generator; and an output from the second power supply. An emission device which is energized to emit a beam, and a third clock cutoff means for stopping or passing a clock output from the pulse generator at a predetermined timing; 3 and outputs a set value according to the third operation pattern in accordance with the clock output from the third clock cutoff means, and interrupts the clock input from the third clock cutoff means. The set value output by the previous clock is held as it is, and the third
A third pattern generator that outputs a set value in accordance with the continuation of the third operation pattern when the clock input from the clock cutoff means is restarted; and a set value output from the third pattern generator. The accelerator system according to claim 1, further comprising: a third power supply device that outputs a voltage according to the following: and a high-frequency acceleration system that accelerates the beam with an output voltage from the third power supply device. . 3. A counter circuit that counts a clock output from the pulse generator and turns on or off a cutoff signal when the count reaches a first or second predetermined value. 3. The accelerator system according to claim 1, further comprising a gate logic circuit that stops or passes a clock output from the pulse generator in accordance with ON or OFF of a cutoff signal from a counter circuit. 4. A timer circuit for measuring a time and turning on or off a cutoff signal when a first or second predetermined value is reached, and turning on and off a cutoff signal from the timer circuit. 3. The accelerator system according to claim 1, further comprising a gate logic circuit that stops or passes a clock output from the pulse generator when the pulse generator is turned off. 4. 5. A pulse generator for generating a clock having a predetermined cycle, a first pattern switching signal generating means for generating a pattern switching signal at a predetermined timing, and a first pattern including a pattern A and a pattern B in advance An operation pattern is held, a set value corresponding to the pattern A is output in accordance with a clock output from the pulse generator, and when a pattern switching signal is input from the first pattern switching signal generating means, an output is output from the pulse generator. Output a set value corresponding to the pattern B in accordance with the set clock.
A first power supply unit that outputs a current according to a set value output from the first pattern generator; and a magnetic field generated by being excited by an output current from the first power supply unit. An accelerator system comprising: an electromagnet; 6. A second pattern switching signal generating means for generating a pattern switching signal at a predetermined timing, and a second operation pattern composed of patterns C and D in advance and output from the pulse generator. A set value corresponding to the pattern C is output according to the clock that has been output, and when a pattern switching signal is input from the second pattern switching signal generating means, the set value corresponding to the pattern D is output according to the clock output from the pulse generator. Output second
A second power supply device that outputs a current or a voltage according to a set value output from the second pattern generator; and a beam that is energized by an output from the second power supply device to generate a beam. An emitting device for emitting light; third pattern switching signal generating means for generating a pattern switching signal at a predetermined timing; and a third operation pattern composed of patterns E and F held in advance and output from the pulse generator. A set value corresponding to the pattern E is output according to the set clock, and when a pattern switch signal is input from the third pattern switch signal generating means, a set value corresponding to the pattern F is set according to the clock output from the pulse generator. Output the third
A third power supply device that outputs a voltage according to a set value output from the third pattern generator; and a high frequency power that accelerates the beam with an output voltage from the third power supply device The accelerator system according to claim 5, further comprising an acceleration system. 7. The first pattern switching signal generating means is a counter circuit that counts a clock output from the pulse generator and generates a pattern switching signal when the clock reaches a predetermined value. Item 7. The accelerator system according to item 5 or 6. 8. The accelerator system according to claim 5, wherein said first pattern switching signal generating means is a timer circuit which measures a time and generates a pattern switching signal when a predetermined value is reached. . 9. A pulse generator for generating a clock having a predetermined period, first hold signal generating means for generating a hold signal at a predetermined timing, and a pulse generator which holds a first operation pattern in advance. A set value corresponding to the first operation pattern is output in accordance with the clock output from the controller. When the hold signal from the first hold signal generating means is ON, the set value output in the previous clock is held as it is. A first pattern generator for outputting a set value in accordance with a continuation of the first operation pattern when a hold signal from the first hold signal generation means is OFF; and an output from the first pattern generator. A first power supply that outputs a current according to the set value, and an electromagnet that is excited by an output current from the first power supply and generates a magnetic field Accelerator system comprising the. 10. A second hold signal generating means for generating a hold signal at a predetermined timing, holding a second operation pattern in advance, and changing the second operation pattern according to a clock output from the pulse generator. And outputs a set value corresponding to the set value. When the hold signal from the second hold signal generating means is ON, zero is output as the set value. When the hold signal from the second hold signal generating means is OFF, the set value is output. A second pattern generator that outputs a set value according to a second operation pattern; a second power supply device that outputs a current or a voltage according to the set value output from the second pattern generator; An emission device that is energized by an output from the power supply device and emits a beam, and a third hold signal generation unit that generates a hold signal at a predetermined timing. A third operation pattern is held in advance, and a set value corresponding to the third operation pattern is output in accordance with a clock output from the pulse generator, and a hold signal from the third hold signal generation means is turned on. When the hold signal from the third hold signal generating means is OFF, the set value output in the previous clock is held as it is, and the set value is output according to the continuation of the third operation pattern. A pattern generator, a third power supply for outputting a voltage according to a set value output from the third pattern generator, and a high-frequency acceleration for accelerating the beam with an output voltage from the third power supply The accelerator system according to claim 9, further comprising a system. 11. The circuit according to claim 9, wherein said first hold signal generating means is a counter circuit which counts a clock output from said pulse generator and generates a hold signal when the count reaches a predetermined value. Or the accelerator system of 10; 12. The timer circuit according to claim 9, wherein said first hold signal generating means is a timer circuit for generating a hold signal when a predetermined time is reached by measuring time.
The accelerator system as described. 13. A respiratory synchronization signal generator for generating a respiration gate signal indicating synchronization of respiration of a patient, wherein each of the clock cutoff means, each of the pattern switching signal generation means, each of the hold signal generation means, or The accelerator system according to any one of claims 1 to 12, wherein a second pattern generator corresponding to the emitting device operates in synchronization with the respiration gate signal.