WO2006118065A1 - 全種イオン加速器及びその制御方法 - Google Patents
全種イオン加速器及びその制御方法 Download PDFInfo
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- WO2006118065A1 WO2006118065A1 PCT/JP2006/308502 JP2006308502W WO2006118065A1 WO 2006118065 A1 WO2006118065 A1 WO 2006118065A1 JP 2006308502 W JP2006308502 W JP 2006308502W WO 2006118065 A1 WO2006118065 A1 WO 2006118065A1
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- acceleration
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- ion beam
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H13/00—Magnetic resonance accelerators; Cyclotrons
- H05H13/04—Synchrotrons
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H15/00—Methods or devices for acceleration of charged particles not otherwise provided for, e.g. wakefield accelerators
Definitions
- the present invention relates to an accelerator for accelerating ions, and more particularly to an accelerator including an induction accelerating synchrotron capable of accelerating all kinds of ions and a control method thereof.
- an ion means that a certain element in the periodic table of elements is in a certain valence state.
- all species ions are all elements in the periodic table of elements, and all valence states that the elements can take in principle.
- ions also include particles with a large number of constituent molecules such as compounds and proteins.
- An accelerator is a device that accelerates charged particles such as electrons, protons, and ions to a high energy state of several million electron volts (several MeV) to several trillion electron volts (several TeV).
- induction acceleration synchrotrons for high-frequency accelerators and protons.
- High-frequency accelerators include linear accelerators, cyclotrons, and high-frequency synchrotrons, depending on the acceleration method. Furthermore, the size of high-frequency accelerators varies depending on the application, and as a high-frequency accelerator for obtaining large energy, a large-scale accelerator for nuclear and particle physics research has recently been used. There are even small high-frequency sinks dedicated to cancer treatment that supply ion beams.
- High-frequency accelerators have used high-frequency acceleration cavities to accelerate charged particles.
- This high-frequency accelerating cavity generates a high-frequency electric field of several MHz to several 10 MHz in synchronization with the traveling of charged particles by excitation by resonant vibration of the high-frequency cavity. Energy from this high-frequency electric field is supplied to charged particles. Since the orbital frequency on the design trajectory of the high-frequency accelerator increases according to the energy change of the charged particle beam, the resonance frequency is varied approximately in the above range.
- Figure 10 shows a set of conventional high-frequency synchrotron complexes 3 4. In particular, the high-frequency synchrotron 35 was indispensable for experiments in nuclear physics and high energy physics.
- the high-frequency synchrotron 35 is an accelerator for raising charged particles to a predetermined energy level based on the principles of resonance acceleration, strong convergence, and phase stability, and has the following configuration.
- the conventional high-frequency synchrotron complex set 3 4 uses the high-frequency linear accelerator 17 b to accelerate ions generated by the ion source 16 to a speed of several percent to several tens of percent.
- An incident device 1 5 that enters an annular high-frequency synchrotron 3 5 using an incident device 1 8 composed of a septum electromagnet, a kicker electromagnet, a bump electromagnet, etc.
- a high-frequency synchrotron 3 5 that accelerates to an energy level, and an ion beam line that is an ion beam 3 that is accelerated to a predetermined energy level 2 1 a is a facility 2 1 a where the experimental equipment 2 1 b is placed 2 1 It consists of an output device 19 including an output device 20 composed of various electromagnets taken out. Each device is connected by transport pipes 16a, 17a, 20a.
- the high-frequency synchrotron 3 5 includes an annular vacuum duct 4 maintained in a high vacuum state, a deflecting electromagnet 5 that deflects the ion beam 3 along the design trajectory, and the ion beam 3 in the vacuum duct 4
- a high-frequency acceleration voltage is applied to the converging electromagnet 6 such as a quadrupole electromagnet 6 and the ion beam 3 in the vacuum duct 4 arranged so as to guarantee strong convergence in both the horizontal and vertical directions.
- the position information power of the ion beam 3 obtained by the standing monitor 3 5 a, the trajectory of the ion beam 3 (referred to as the lost orbit distortion). correction Because of steering-ring electromagnet 3 5 b, and the like punch monitor one 7 for sensing the passage of the ion beam 3.
- the high-frequency linear accelerator 1 7 b accelerates to a certain energy level, and the incident ion beam 3 is continuously uniform in the direction of the traveling axis. It circulates around the design trajectory in vacuum duct 4 with a stable charge density distribution.
- the ion beam 3 forms a charged particle group (hereinafter referred to as a bunch) around a phase with a high-frequency voltage.
- the frequency of the voltage applied to the high-frequency acceleration cavity 36 a is increased in synchronization with the excitation pattern of the deflection electromagnet 5 that holds the design trajectory of the ion beam 3. Also, by shifting the phase of the notch center to the high frequency voltage to the acceleration phase side, the momentum of the circulated ion beam 3 increases.
- the frequency of the high frequency has a relationship that is an integral multiple of the circulating frequency of ions.
- the charge of the charged particles in the ion beam 3 is e
- the momentum is p
- the magnetic flux density is
- the magnetism of the deflecting electromagnet 5 is measured by a magnetic field measurement suminole, and each change of the magnetic field strength is measured.
- the ion beam 3 will shrink or expand, causing it to deviate from the design orbit and collide with the vacuum duct 4 etc. And lost. Therefore, the displacement of the ion beam 3 from the design trajectory is measured by the position monitor 8 that detects the straight displacement, and the phase of the r3 ⁇ 4 frequency pressure necessary for the ion beam 3 to go around the design trajectory is calculated.
- the system configuration is such that a feedback is applied so that the frequency acceleration voltage is applied to the center of the substrate at an appropriate phase.
- each ion is bunched, and the high frequency sink is moved back and forth in the traveling direction of the ion beam 3. This is called phase stability of the inter-frequency sink port 3 5.
- Figure 11 shows the confinement of the bunch due to the high frequency of the conventional high frequency sink port ⁇ ⁇ 35.
- the phase space region where the punch 3a can be confined, especially in the direction of the traveling axis (time axis) (Direction) is known to be limited in principle.
- the punch 3a is decelerated in the time domain where the high frequency 37 is negative, and the charged particles diverge in the direction of the traveling axis and cannot be confined in the time domain where the polarity of the voltage gradient is different.
- the ion beam 3 can be used for acceleration only in the time zone of the acceleration voltage 3 7 a which is approximately between the dotted lines.
- the punch head 3 is controlled by controlling the high frequency 3 7 so that the center acceleration voltage 3 7 b is always applied to the punch center 3 b.
- the particle located at c has higher energy than the punch center 3 b and reaches the high-frequency acceleration cavity 3 6 a faster. Therefore, the head acceleration smaller than the center acceleration voltage 3 7 received by the center 3 b Receives a voltage of 3 7 c and speeds up.
- the particles located at the punch tail 3d have lower energy than the punch center 3b and reach the high-frequency acceleration cavity 36a later, so that the center acceleration voltage 37b received by the punch center 3b It receives a large tail acceleration voltage of 37 d and accelerates. During acceleration, the particles repeat this process.
- the maximum ion beam current that can be accelerated is determined by the magnitude of the space charge force, which is the divergent force caused by the electromagnetic field created by the ion beam 3 itself in the direction perpendicular to the beam travel axis.
- the charged particles in the accelerator receive a force from the converging magnet and move similar to a harmonic oscillator called a beta-tron vibration.
- the ion beam current exceeds a certain magnitude, the amplitude of the beta-tron oscillation of the charged particles reaches the size of the vacuum duct ⁇ 4 and is lost. This is called space charge limitation.
- the high-frequency synchrotron 35 has the highest density at the punch center 3b, and the punch center 3b, punch head 3c, punch tail 3d, etc. An imbalance of current density at the outer edge is inevitable. In addition, the current density at the punch center 3 b had the disadvantage that it must be below this limit.
- the particle's orbital frequency f is always synchronized with the particle's orbit whose frequency changes with acceleration.
- the resonant frequency f rf of the high frequency acceleration cavity 3 6 a is always.
- the relationship (: integer) must be maintained. This is realized by moving the operating point on the B–H curve by exciting the magnetic body with a separate current called bias current, and controlling the relative permeability i *.
- the largest ingot is when the bias current is around 0 A, but it is determined by its operating point.
- the frequency becomes the minimum resonance frequency
- the built-in high-frequency sink Ptron 35 has a high-frequency accelerating cavity 36a itself and a high-frequency power amplifier (tripolar or quadrupolar power vacuum tube) that is the driving power supply.
- the car and the valence number can only be selected in 11 cars that are allowed by the variable width of the finite frequency.
- the frequency band width of the high-frequency 37 is determined to be 1 g. .
- Figure 12 shows various ion energy accelerator research organizations (KEK).
- 5 Me Me V booster proton synchrotron hereinafter referred to as 5 Me Me VPS
- the vertical axis is the orbital frequency (megahertz)
- the horizontal axis is Acceleration Hijira (middle second)
- KE K's 50 0 MeVPS is a high-frequency sink port dedicated to protons with a circumference of approximately 35 meters.
- 39 means 9-valent uranium and 5 valent uranium ions, and the acceleration frequency change for each is shown in the graph.
- the high-frequency sink ⁇ ron 35 which was created for the purpose of accelerating protons and light ions, reduced the heavy energies such as uranium and other low energies at a low frequency.
- cyclotrons have long been used as accelerators to accelerate various ions.
- the high-frequency acceleration cavity 3 6a is used as the ion beam 3 accelerator. Therefore, due to the theoretical limit of using high frequency 37, the ratio of the mass number A of the ion that can be accelerated to the valence number Z is limited to the ion species and the valence state where the Z / A is almost equal. There are other disadvantages.
- the orbit of the ion beam 3 is taken out from the central part of the ion source 16 and is maintained in a uniform magnetic field from the center to the outermost part of the orbit, and the necessary magnetic field is a bipolar with iron as a magnetic material. It is generated with an electromagnet.
- this type of electromagnet has the disadvantage of being limited in physical size.
- the maximum acceleration energy in cyclotrons constructed so far is 5 20 MeV per nucleon.
- the weight of iron ranges up to 400 tons.
- an induction acceleration synchrotron has been proposed as a proton circular accelerator in recent years as an accelerator different from a high-frequency accelerator.
- the proton-induced acceleration synchrotron for protons is an accelerator that can avoid the disadvantages of the high-frequency synchrotron 35 described above. In other words, it is an accelerator that can significantly pack protons in the direction of the traveling axis while keeping the linear density below the limit current value.
- the first feature of the induction accelerating synchrotron for protons is that the proton beam is confined in the direction of the traveling axis by the positive and negative induced voltages generated in the induction accelerating cell.
- a long proton group (super punch) can be created.
- the conventional high-frequency synchrotron 35 is a combined function that performs proton confinement and acceleration with a common high-frequency 37 in the direction of the traveling axis
- the induction acceleration synchrotron Ron is a function-separated type that separates confinement and acceleration.
- the separation of proton confinement and acceleration functions has been made possible by induction accelerators that perform separate functions.
- the induction accelerator has one magnetic core with a magnetic core. It consists of an induction accelerating cell that specializes in confining protons, a induction accelerating cell that specializes in acceleration, and switching power sources that drive the induction accelerating cells.
- a pulse voltage is generated in the induction accelerating cell in synchronization with the circulating frequency of the proton beam. For example, in the case of an accelerator with a circumference of 300 torque, a pulse voltage must be generated by repeating C W 1 MHz.
- Proton driven accelerators and colliders (colliders) that explore next-generation neutrino oscillations have been proposed as direct applications of this induction acceleration sink port for protons. According to this, it is expected that a proton beam intensity about 4 times higher than the proton beam intensity of the proton accelerator composed of the conventional high-frequency synchrotron 35 can be realized.
- a collision type accelerator that uses the induction accelerating sink opening tron is called a super punch / no-drone collider.
- Confined super bunch 'Super Accelerator that can take advantage of the characteristics of the accelerated accelerating syncron tron, the drone collider is based on a syncron that uses the conventional high frequency 3 7
- the same luminosity is expected to be one digit larger than the colliders of the same size. This is equivalent to constructing 10 colliders with a construction cost of about 300 billion yen.
- protons cannot be accelerated only by induced voltages with different polarities. So, another one _ Protons are accelerated in an induction accelerating cell that can apply an induced voltage like this. As a result of the separation of the functions of confinement and acceleration, it is known and is being demonstrated that the freedom of beam handling in the direction of the traveling axis is greatly increased.
- 12 G e VPS KEK's 12 G e V proton high-frequency synchrotron
- the quality factor of the high-frequency accelerating cavity 36a as a cavity resonator used for acceleration is high, and the high-frequency synchrotron 35 has a finite band width. Only 7 could be excited. Therefore, when the circumference of the high-frequency synchrotron 35, the strength of the deflecting electromagnet 5 to be used, and the band width of the high-frequency 37 to be used are determined, in the low energy region where the relativistic speed varies greatly.
- the mass number A and the valence number Z of ions that can be accelerated are almost uniquely determined, and only a limited number of ions can be accelerated.
- the incident energy is already sufficiently high, and only acceleration of protons having almost the speed of light velocity is considered. That is, the proton beam is already incident by the acceleration of the previous accelerator. c
- the light was accelerated to near the speed of light. Therefore, in order to accelerate the proton with the induction acceleration sink, it was only necessary to generate the induction pulse voltage of the induction acceleration cell at regular intervals. Therefore, the generation timing of the induced voltage applied to the proton beam did not need to change with the acceleration time.
- the present invention adds all types of ions to an arbitrary energy level (hereinafter referred to as arbitrary energy—Leverole and L.) allowed by the strength of the magnetic field generated by the used stone with the same accelerator. providing accelerator that can the child 1 "and it is an object. open the invention not
- an annular true duct having an ion beam design trajectory therein, and a circular trajectory of the BX beam beam on the curved portion of the design trajectory are maintained.
- Bone magnet that is installed in the linear part of the design trajectory to prevent the diffusion of the ion beam, and a bunch monitor that senses the passage of the ion beam in the vacuum duct.
- a position motor that detects the center of gravity of the ion beam provided in the vacuum duct ⁇
- a confinement induction that applies an induction pressure to confine the ion beam connected to the vacuum duct in the direction of travel
- a confinement induction accelerator device comprising a confinement intelligent control device that controls the drive of the acceleration cell and the confinement induction cell, and a ion beam connected to the vacuum duct Induced voltage to accelerate
- An induction accelerating synchrotron composed of an accelerating induction accelerating device comprising an accelerating induction accelerating cell to be applied and an accelerating intelligent control device for controlling the driving of the accelerating induction accelerating cell;
- the induction acceleration synchrotron accelerates the ion generated at the ion source to a constant energy level with the previous stage accelerator, and enters the ion beam into the induction acceleration synchrotron.
- the intelligent control device for confinement marks the passing and ion beams from the punch monitor. , Eight, for the confinement for controlling on / off of the switching power supply for driving the confining induction acceleration cell in response to the conductive voltage signal from the voltage monitor for knowing the added induced voltage value
- a confinement digital signal processor that calculates the confinement gate parent signal that is the basis of the confinement gate signal pattern of the confinement turn generator that generates the gate signal pattern
- the acceleration intelligent control device performs feedback control on the generation timing and application time of the induction voltage applied to the induction accelerating cell for confinement.
- the induction accelerating cell for acceleration Acceleration switching In response to the passing signal from the notch monitor, the position signal from the position monitor, and the induced voltage signal from the voltage monitor for knowing the induced voltage value applied to the ion beam, the induction accelerating cell for acceleration Acceleration switching that generates an acceleration gate signal pattern that controls on / off of the power supply
- Acceleration gate signal The base of the acceleration gate signal that calculates the base signal of the acceleration gate signal is calculated by the signal processing device for acceleration speed, and the current speed is adjusted to the current speed.
- the configuration of the all-ion accelerator is characterized by the feedback control of the generation timing and the application time of the induced voltage, and the acceleration control of all types of ions to an arbitrary energy level.
- Fig. 1 is an overall configuration diagram of an all-ion accelerator according to the present invention
- Fig. 2 is a sectional view of an induction accelerating cell
- Fig. 3 is a schematic diagram of an induction accelerating cell and an intelligent controller for confinement and acceleration.
- Fig. 4 shows the equivalent circuit of the induction accelerator
- Fig. 5 shows how the ion beam is confined by the confining induction cell
- Fig. 6 shows how the ion beam is accelerated by the induction cell.
- Fig. 7 is a diagram showing how ion beam is partially confined and accelerated by an induction accelerating cell.
- Fig. 8 is a diagram showing confinement and acceleration control by a triple induction accelerating cell.
- Fig. 1 is an overall configuration diagram of an all-ion accelerator according to the present invention
- Fig. 2 is a sectional view of an induction accelerating cell
- Fig. 3 is a schematic diagram of an induction accelerating cell and an intelligent controller for confinement and
- FIG. 10 shows the energy level achieved when various ions are accelerated
- Fig. 10 shows the overall configuration of a conventional high-frequency synchrotron complex
- Fig. 11 shows the phase stability principle of the high-frequency synchrotron.
- Figure 1 2 shows the current KEK 5 0 It is a figure showing the change in frequency (estimation) from the incidence of various ions to the end of acceleration when accelerating with 0 Me VPS.
- the configuration of the converging electromagnet 6 of the induction accelerating synchrotron 2 constituting the all-type ion accelerator 1 according to the present invention is the same as that of the conventional high-frequency synchrotron 35.
- the high-frequency accelerator 3 6 is replaced with a confining induction accelerator 9 and an acceleration induction accelerator 1 2.
- the inductive acceleration cell for confinement 10 and the inductive acceleration cell for acceleration 13 constituting the induction accelerator for confinement 9 and the induction accelerator for acceleration 12 are pulse voltages capable of high repetitive operation 10 f It is driven by the confinement and acceleration switching power supplies 9 b and 12 b that generate
- the on / off operation of the switching power supplies 9b 'and 12b for confinement and acceleration is the gate drive of switching elements such as MOSFETs used for the switching power supplies 9b and 12b for confinement and acceleration. This is done by controlling the gate signal patterns for confinement and acceleration 11 1 a and 14 a.
- the confinement and acceleration gate signal patterns 1 1 a and 14 a are generated by the confinement and acceleration pattern generators 1 1 b and 14 b.
- the pattern generators for confinement and acceleration 1 1 b and 14 b start operation with the gate signal for confinement and acceleration 1 1 c and 14 c
- the gate signal for confinement gate 1 lc The ion beam 3 passing signal 7 a detected by the punch monitor 7 and the induced voltage signal 9 e for knowing the induced voltage value applied to the ion beam 3 by the confining induction acceleration cell 10 are confined. It is generated in real time by a pre-programmed processing method by the digital signal processing device 11 1d.
- Acceleration gate parent signal 14 c is the ion beam 3 passing signal 7 b and ion beam 3 position signal 8 a detected by the punch monitor 7 and the position monitor 8, and the acceleration induction cell 1 for acceleration. 3 Generated in real time by a pre-programmed processing method based on the induced digital signal processor 14 d based on the induced voltage signal 1 2 e to know the induced voltage value applied to the ion beam 3 Is done.
- the induction accelerating cell for confinement 10 is turned on to generate negative and positive barrier voltages 2 6 and 2 7 (hereinafter simply referred to as a barrier one voltage).
- this barrier voltage The generation interval 30 is gradually narrowed, and the ion beam 3 distributed over the entire circumference of the design trajectory 4 a is generated in the acceleration induction cell 1 3 for acceleration. Make punch 3a. Thereafter, the deflection electromagnet 5 and the focusing electromagnet 6 of the induction accelerating synchrotron 2 are excited.
- the confinement gain signal ⁇ pattern 1 1 a is generated according to the excitation of the magnetic field, Synchronize.
- the induction for acceleration Acceleration gate signal pattern of acceleration cell 1 3 by controlling pulse voltage 10 f of acceleration voltage 28 and reset voltage 29 (hereinafter simply referred to as induction voltage for acceleration) 1 4 a is generated and synchronized with the excitation of the magnetic field.
- the generation of the constant voltage and the induced voltage for acceleration is controlled temporally so that the acceleration of the ion beam 3 follows the excitation of the magnetic field. As a result, the ion beam 3 is inevitably accelerated as a punch 3a. The ion beam 3 is confined and accelerated.
- This series of control devices is referred to as the confinement and acceleration intelligent control devices 1 1 and 1 4.
- the feedback control by the intelligent controller for confinement and acceleration 11 and 14 is controlled by the digital signal processor for confinement and acceleration according to the ion type and the target energy level. 1 All ions can be accelerated to any energy level simply by changing the program settings of 1 d and 14 d.
- the extraction method includes a quick extraction device 20 such as a kicking force electromagnet, and a method of taking it out in one turn while maintaining the structure of the punch 3a. Structure of punch 3a by gradually widening 0 to the lap time and then turning off the gate driving of the switching power supply 9b, 12b for driving the induction acceleration cell 10 for closing one end Break down ⁇
- Fig. 1 is a general view of an all-ion ion accelerator according to the present invention.
- All types of ion accelerator 1 of the present invention are devices other than confining induction accelerator 9 and acceleration induction accelerator 1 2 for controlling the acceleration of ion beam 3, and high-frequency, linear accelerator 17 b.
- the device used in the conventional high-frequency synchrotron complex set 3 4 can be used.
- the all-type ion accelerator 1 includes an incident device 15, an induction accelerating synchrotron 2, and an extraction device 19.
- Injector 15 is connected to ion source 16, upstream accelerator 17, injector 1 8, and each device upstream of induction accelerating synchrotron 2, and is the transport path of ION It consists of tubes 16a and 17a.
- Examples of the ion source 16 include an ECR ion source that uses an electron cyclotron resonance heating mechanism and a laser-driven ion source.
- the ion beam may be directly incident from the ion source i 6 to the induction acceleration sink port.
- a variable voltage electrostatic accelerator or a linear induction accelerator is generally used.
- a small cyclotron can also be used if the type of ion to be used is determined.
- the incident equipment 1 8 is the equipment used in the high-frequency synchrotron complex set 3 4. In particular, no special apparatus or method is required for the all-type ion accelerator 1 according to the present invention.
- the incident device 15 having the above configuration accelerates the ion beam 3 generated by the ion source 16 to the induction acceleration synchrotron 2 to a certain energy level by the pre-stage accelerator 1 7. It is incident at 8.
- the induction accelerating synchrotron 2 is an annular vacuum duct 4 in which the design trajectory 4 a of the ion beam 3 is located, and a deflection that is provided on the curved portion of the design trajectory 4 a and holds the circular trajectory of the ion beam 3.
- Convergence electromagnet 6 for preventing diffusion of light punch monitor 7 provided in the vacuum duct 4 for detecting the passage of the ion beam 3, and center of gravity position of the ion beam 3 provided for the vacuum duct 4
- a position monitor 8 a confinement induction acceleration cell 10 for applying an induction voltage for confining the ion beam 3 connected to the vacuum duct 4 in the traveling direction, and the confinement induction acceleration cell 10.
- the acceleration induction acceleration cell 1 3 includes an acceleration induction acceleration cell 13 to be applied and an acceleration intelligent control device 14 4 that controls the driving of the acceleration induction acceleration cell 1 3.
- the ion beam 3 incident on the induction accelerating synchrotron 2 by the injector 15 is transferred to another induction accelerating cell by an induction voltage of a predetermined polarity by the induction accelerating cell. It is possible to reduce the length of the punch 3a to a fixed length so that it can be guided to acceleration, or to change the length of the ion beam 3 to various other lengths, and to stabilize the phase of the punch 3a of the ion beam 3 during acceleration. It means that it has a function to give sex.
- “Acceleration” means that after forming the punch 3 a of the ion beam 3, it has a function of applying an induction voltage for acceleration to the entire punch 3 a.
- the induction accelerator 9 for confinement and the induction accelerator 1 2 for acceleration are the same, but the functions for the ion beam 3 are different.
- the term “guidance accelerator” means both the induction accelerator 9 for confinement and the induction accelerator 1 2 for acceleration.
- the induction accelerating cell means both the confining induction accelerating cell 10 and the accelerating induction accelerating cell 13.
- the term “electromagnet” means both the deflecting electromagnet 5 and the converging magnet 6.
- the extraction device 19 is a transport pipe connected to a facility 2 1 a where an experimental device 2 1 b and the like using an ion beam 3 that has reached a predetermined level of energy by the induction acceleration synchrotron 2 is installed. 2 0a and ion beam utilization line 2 1 and extraction device 2 0 taken out.
- the experimental device 21 b includes medical equipment used for treatment.
- the extraction device 20 uses a single-electron magnet that can be quickly extracted, or a Buttertron resonance. There is a device that takes out slowly, the type of ion beam 3, It can be selected according to the application.
- the single all ion accelerator 1 can accelerate all the ion ions to an arbitrary energy level.
- FIG. 2 is a schematic cross-sectional view of a confining induction accelerating cell constituting the all-type ion accelerator according to the present invention.
- the confining and accelerating induction accelerating cells 10 and 13 used in the present invention have the same structure in principle as the induction accelerating cavities for linear induction accelerators produced so far.
- the confinement induction cell 10 will be described.
- the induction accelerating cell 10 for confinement has a double structure consisting of an inner cylinder 10 a and an outer cylinder 10 b, and a magnetic substance 10 c is inserted into the outer cylinder 10 b and the inductance is increased. make.
- Part of the inner cylinder 10 a connected to the vacuum duct 4 through which the ion beam 3 passes is made of an insulator 10 d such as ceramic. Since the induction accelerating cell generates heat when used, cooling oil or the like may be circulated through the flange of the outer cylinder 10b, and an insulating seal 10j is required.
- the closure is closed.
- the induced voltage having a length corresponding to the time width of the head that gives the electric field 10 e opposite to the traveling direction (hereinafter referred to as a negative barrier voltage). ) Is generated.
- the negative barrier voltage is sensed and the ion energy decreases. In the time zone in which the punch center 3 b of the ion beam 3 passes, no induced voltage is generated.
- Induced voltage that gives an electric field 10 e in the same direction as the traveling direction in the time zone when the punch tail 3 d (where ions with somewhat lower energy than the ions at the punch center 3 b exist) passes through. (Hereinafter referred to as positive barrier voltage).
- positive barrier voltage The energy of ions that felt an induced voltage with a different sign increases.
- the ion energy having an energy larger than the ion energy at the punch center 3 b starts with the ion energy at the punch center 3 b. It becomes lower and the time to reach the confinement induction cell 10 begins to be delayed, and eventually it is located at the punch tail 3d. This time, as described above, the punch tail 3 d feels an induced voltage that gives an electric field 10 e in the same direction as the traveling direction of the ion beam 3. After a while, the punch center 3 b is the reverse process of the arrival delay. The phenomenon of overtaking and the early arrival of the confinement induction cell 10 occurs. The ion beam 3 accelerates by repeating this series of processes. This is called confinement in the traveling direction of the ion beam 3.
- the ion beam 3 the same effect as the phase stability (Fig. 11) by the conventional high-frequency synchrotron 35.
- the function of the confinement induction cell 10 is equivalent to the separation of only the confinement function of the conventional high-frequency acceleration cavity 36a.
- a high frequency 37 is always excited whether the ion beam 3 is present or not. It can be said that the induction accelerating cell has digital operation characteristics with respect to the high-frequency accelerating cavity 36a in the state.
- an induction voltage (hereinafter referred to as an acceleration electric field) is generated so that an acceleration electric field is generated in the same direction as the traveling direction. This is called acceleration voltage.
- An induced voltage (hereinafter referred to as reset voltage) must be applied (reset) to the induction cell for acceleration 13.
- Inductive acceleration cell for confinement 10 Inductive voltage generated as a result of reset ⁇ is also effective. Used for confinement in the direction of travel
- Fig. 3 shows the structure of the induction accelerator and the ion beam acceleration control method.
- the confinement induction accelerator 9 is a confinement induction cell 10 for generating a barrier voltage, which is an induction voltage of a different polarity for confining ion beam 3 in the traveling direction. High-repetitive operation of confinement switching that gives pulse voltage 10 f to induction accelerating cell 10 via transmission line 9a ⁇ m-
- This transmission line 9a is used when the switch used for the confining switching power supply 9b cannot withstand operation in a high radiation environment such as a semiconductor. Switch element where radiation damage is not a problem or unnecessary if a low radiation environment can be maintained.
- the confinement switching power source 9b and the confinement induction cell 10 can be directly connected.
- the confinement intelligent control device 1 1 includes a confinement pattern signal 1 1 a for generating the confinement gate signal pattern 1 1 a for controlling the on / off operation of the confining switching power supply 9 b.
- -A confinement gate parent signal that is information based on the generation of the confinement gate signal pattern 1 1 a by the confinement pattern generator 1 1 b and the confinement pattern generator 1 1 b 1 1 From 1d, digital signal processor for confinement to calculate 1c.
- the confinement game parent signal 1 1 c is the passage signal of the ion beam 3 measured by the bunch monitor 7 that knows the passage of the ion beam 3 placed on the design trajectory 4 a. 7 a, and the voltage monitor 9 d for detecting the induced voltage value applied to the ion beam 3 is confined according to the preprogrammed processing method based on the induced voltage signal 9 e measured by the voltage monitor 9 d.
- Digital signal processor 1 1 Calculated by 1d and generated into y-time Specifically, in the confining digital signal processing device 11 d, the generation timing of the barrier voltage applied from the mi over-signal 7 a is set to the passing signal 7 a and the induced voltage signal 9 e. Force, et al. — Calculates the length of voltage application time, converts it to a y digital signal, and outputs it to the confinement pattern generator 1 1 b.
- the gate signal pattern for confinement 1 1 a has a negative signal applied to the ion beam 3
- the negative and positive barrier voltage values differ depending on the characteristics and type of ion beam 3, but they can be constant during acceleration, so they are pre-loaded into the confinement digital signal processor 11 1d. Mouth Gram. DC charger to be used 9c tank; n capacitor-2
- the induced voltage value is determined by the output voltage of 3.
- the configuration of the acceleration m guide acceleration device 12 is composed of acceleration voltage for accelerating the ion beam 3 in the traveling direction and reset voltage for avoiding fe saturation of the magnetic material 10 c.
- Acceleration induction acceleration cell 1 3 that generates an induction voltage for acceleration, and the acceleration induction acceleration senor 1 3 is given a Noreha * 3 ⁇ 4 pressure of 10 f via a transmission line 1 2 a and can be operated repeatedly.
- Acceleration switching power supply 12 Acceleration intelligent control device 14 that feeds back on and off operations of the b ⁇ Control device 14, Acceleration induction acceleration cell 13 ⁇ A voltage motor for knowing the applied induced voltage is 1 2 d.
- the acceleration induction accelerator 12 is electrically the same as the confinement induction accelerator 9 although the function of the induced voltage applied to the ion beam 3 is different.
- the reset voltage generated to avoid magnetic saturation of the magnetic substance 10 c has no effect on the ion beam 3, and the generation timing of the reset voltage is the ion beam 3. It is different from the case of the induction accelerator 9 for confinement when it is selected in the time zone when the is not passing.
- the acceleration intelligent controller 14 generates the acceleration gate signal pattern 14 a for controlling the on / off operation of the acceleration switching power supply 12 b.
- Accelerator gain signal parent signal 1 4 for controlling the operation that is the information of the generation of the acceleration goot signal pattern 1 4 a by the generator 14 b and the acceleration pattern generator 14 b It consists of an acceleration digital signal processor 14 d that calculates c. 1
- the accelerating gate parent signal 14 c is generated by the ion beam 3 passing signal 7 b and the ion beam 3 measured by the punch monitor 7 that senses the passage of the ion beam 3 placed on the design trajectory 4 a.
- a position signal 8 a measured by the position monitor 8 that senses the position of the center of gravity, and a voltage monitor 1 2 d measured by the voltage monitor 1 2 d to know the induced voltage value applied to the ion beam 3 1 2 e Based on the above, it is calculated by the acceleration digital signal processor 14 d according to a pre-programmed processing method and generated in real time.
- the generation timing of the induction voltage for acceleration applied from the passage signal 7 b and the position signal 8 a is used as the generation timing of the passage signal 7 b and the induction signal.
- the length of time for which the induced voltage for acceleration is applied is calculated from the voltage signal 1 2 e, converted to a digital signal, and output to the acceleration pattern generator 14 b.
- the acceleration gate signal pattern 14 a has three patterns of acceleration voltage 28 applied to the ion beam 3, reset voltage 29 and voltage off.
- the acceleration voltage value and reset voltage value are determined by the output voltage of the DC charger 12c and bank capacitor 23.
- the acceleration voltage 28 is generated in synchronization with the excitation pattern of the electromagnet of all types of ion accelerator 1.
- Confinement and acceleration gate signal patterns generated in real time 1 1 a, 14 a a confinement that drives induction and acceleration cells 10 0, 1 3 for confinement and acceleration from approximately 0 Hz It has been demonstrated that the switching power supply for power and acceleration can be variably generated up to 1 MHz, which is close to the operating limit of the semiconductor switching elements of 9 b and 12 b.
- the processing of digital signal processor lld for confinement and acceleration with specific feedback function, lld, 14 d for confinement and acceleration gate parent signals 11 c and 14 c is as follows. It is done. An induced voltage higher than the induced voltage guaranteeing ideal acceleration is The ion beam 3 is shifted outward from the design trajectory 4a. This happens when there is an error in the voltage setting accuracy of the DC chargers 9c and 12c. In such a case, the charging voltage of the bank capacitor 2 3 of the confinement and acceleration switching power supplies 9 b and 12 b deviates from the ideal value. As a result, the induced voltages generated in the confining and accelerating induced acceleration cells 10 and 13 deviate from the values necessary for acceleration.
- the displacement of the orbit of the ion beam 3 is detected by the position signal 8a detected by the position monitor 8, and the displacement of the momentum is known.
- the acceleration digital signal processor 14 4 d calculates to intentionally stop the generation of the acceleration voltage 28 as much as necessary to correct this deviation, and the generation of the acceleration gate parent signal 14 c is generated. Stop.
- a plurality of position monitors 8 can be used. By using multiple position monitors 8, the acceleration of the ion beam 3 can be controlled with higher accuracy, and the loss of the ion beam 3 can be avoided.
- the design trajectory 4 a of the ion beam 3 can be maintained, and all ions can be stably accelerated to an arbitrary energy level. It became.
- Fig. 4 is an equivalent circuit diagram of the induction accelerator for confinement.
- the equivalent circuit 2 2 of the confinement induction accelerator is closed via the transmission line 9 a when the switching power supply 9 b for confinement that is constantly supplied with power from the DC charger 9 c.
- the induction cell 10 for confinement is shown as a parallel circuit of L, C, and R. The voltage across the parallel circuit is the induced voltage felt by ion beam 3.
- the first and fourth switches 23a and 23d are turned on by the gate signal pattern 11a for confinement.
- the voltage charged in 2 3 is applied to the confinement induction cell 10, and an induction voltage for confining the ion beam 3 is generated in the acceleration gap 1 0. i.
- the first and fourth switches 23a and 23d, which were turned on are turned off by the gate signal pattern for confinement 11a and the second and third switches 2 3 b and 2 3 c are turned on by the confinement gate signal pattern 11a, and an induced conductive pressure in the direction opposite to the induced voltage is generated in the acceleration gap 10i.
- the magnetic saturation of the magnetic material 10 c is reset.
- the second and third switches 2 3 b and 2 3 c are connected to the gate signal pattern for confinement 1 1 a.
- the first and fourth switches 23a and 23d are turned on.
- the confining gate signal pattern 11 a is a signal for controlling the driving of the confining switching power source 9 b, the passing signal 7 b of the ion beam 3, and the applied induced pressure value.
- the confinement intelligent control device 1 1 consisting of the confinement digital signal processing device 1 1 d and the confinement pattern generator 1 1 b Digitally controlled.
- the induced voltage applied to the ion beam 3 is equivalent to a value calculated from the product of the current value in the circuit and the matching resistance 2 4. Therefore, it is possible to know the value of the applied induced voltage by measuring the current value. Therefore, the induced voltage signal 9e obtained by the voltage monitor 9d, which is an ammeter, is fed back to the confinement digital signal processor 1 1d and the next confinement gate parent signal 1 1c Used to generate
- Figure 5 shows the process of ion beam confinement by the confinement induction cell.
- Fig. 5 (A) shows the state of the ion beam 3 immediately after the start of confinement.
- the horizontal axis is time, and the vertical axis is the induced voltage value.
- the double-headed arrow represents the lap time 25 for the ion beam 3 to make one round of the design trajectory 4a.
- (B) shows the process of ion beam confinement by the confinement induction cell.
- An ion beam 3 spreading over the entire design trajectory 4 a is generated in a confining induction cell 10.
- a negative barrier voltage 26, which is an induced voltage in the direction opposite to the traveling direction, is generated.
- the application time 26 6 a for the negative beam 1 voltage 26 applied to the ion beam 3 may be short.
- a positive barrier voltage 27 in the same direction as the traveling direction of the ion beam 3 at the end point of the circulation time 25 of the ion beam 3 which is the end of the ion beam 3 is placed in the induction cell 10 for confinement. ⁇
- this positive barrier voltage 2 7 is also used to avoid magnetic saturation of the magnetic substance 1 O c, the negative barrier voltage 26 and the induced voltage value are equivalent. is required. Therefore, if the application time 27a for the ion beam 3 is short and the same induced voltage as the negative barrier voltage 26 is applied, the application time 27a will be the same time. These barrier voltages cause induction The entire ion beam 3 incident on the acceleration synchrotron 2 and distributed over the entire design trajectory 4 a is confined.
- Fig. 5 (B) shows the progress of the punch 3a of the ion beam 3 in order to accelerate the ion beam 3 confined in Fig. 5 (A) with a temporally limited induction voltage. The process of reducing the length in the direction is shown.
- a time interval (hereinafter referred to as a barrier) that generates a negative barrier voltage 26 that supplements the tip of the ion beam 3 and a positive barrier voltage 27 that supplements the end of the ion beam 3.
- the voltage generation interval 30 is shortened, and the ion beam 3 can be accelerated in the application time 2 8 a of the acceleration voltage 2 8 generated in another induction cell 1 3 for acceleration.
- the ion beam 3 is turned into a punch 3 a having an application time of 2 8 a ⁇ with an acceleration voltage of 2 8.
- an intelligent controller for confinement is used to fix the generation timing of the negative barrier voltage 26 and to accelerate the generation timing of the positive barrier voltage 27. This is done. Note that the white arrow on the left is the direction of movement of the positive barrier voltage of 27.
- FIG. 6 is a diagram showing a state when the ion beam is accelerated by the induction acceleration synchrotron constituting the present invention.
- V (t) means an induced voltage value.
- FIG. 6 (A) shows the positions of the punch 3 a and the super punch 3 e of the ion beam 3 on the design trajectory 4 a at a certain time during acceleration.
- Fig. 6 the case of confining and accelerating the ion beam 3 in each of the confining induction accelerating cell 10 and the accelerating induction accelerating cell 13 corresponding to the design orbit 4a will be described.
- the passage of the ion beam 3 is confirmed by the passage signals 7 a and 7 b of the punch monitor 7.
- FIG. 6 (B) shows how the ion beam 3 is confined by the confinement induction cell 10.
- t (a) is the generation timing and application time of the clear one voltage based on the time when the punch 3a or the super punch 3e reaches the induction cell 10 for confinement. 2 7 a.
- the vertical line indicated by the dotted line means the lap time 2 5 of punch 3 a or super punch 3 e. Same in Figure 6.
- the time required for the tail of punch 3a or super punch 3e to reach the induction acceleration cell 10 for confinement by digital signal processing device 1 1d for confinement Calculate and generate a gate signal pattern for confinement 1 1 a to generate a positive barrier voltage 2 7, and a positive rear voltage 2 at the tail of punch tail 3 d or super punch 3 e 7 is applied.
- the applied negative and positive barrier voltage 2 6 2 7 is calculated by the confinement digital signal processor 1 1 d based on the induced voltage signal 9 e from the voltage monitor 9 d, and the next confinement Used for the main gate signal 1 1 c. Even if the ion beam 3 is a short punch 3a, it can be dealt with only by shortening the barrier voltage generation interval 30.
- ⁇ Fig. 6 (C) shows how the ion beam 3 is accelerated by the acceleration induction cell 13 for acceleration.
- t (b) is the generation timing and application time of the induction voltage for acceleration based on the time when the punch 3a or super punch 3e reaches the induction cell 1 3 for acceleration. 9 a.
- the punch 3a or the super punch 3e reaches the induction cell 1 3 for acceleration by the digital signal processing device 14d for acceleration.
- the acceleration gate signal pattern 14 a is generated so as to generate the acceleration voltage 28 and applied to the entire punch 3 a or the super punch 3 e.
- the reset voltage 29 is calculated by the acceleration digital signal processor 14 d and avoids magnetic saturation of the magnetic material 10 c during the time zone when the ion beam 3 in the design orbit 4 a does not exist. Therefore, it is applied as an induced voltage with the opposite polarity to the acceleration voltage 28. In this way, punch 3a and super punch 3e can be accelerated. (1/2) T. Means that the time reference of t (a) in Fig. 6 (B) and t (b) in Fig. 6 (C) is shifted by half of the lap time 25.
- FIG. 6 (D) shows the acceleration of punch 3a or super punch 3e at a certain time. That is, FIG. 6 (B) and FIG. 6 (C) are synthesized. Obedience The horizontal axis! : Is a time reference in which the lap time 25 of 1 2 is shifted from the time reference of the induction cell 10 for confinement and the induction cell 1 3 for acceleration. The same applies to t in Fig. 7.
- FIG. 7 is a diagram showing a method of accelerating after the ion beam 3 is made into a plurality of punches 3a. This method has the advantage that the induced voltage value of the barrier voltage is small.
- the method of accelerating is to make the incident DC beam-like ion beam 3 into a plurality of bunches 3a in advance, and finally a single bunch 3a ( Super punch 3 e) can be achieved by following the order of Fig. 7 (A) force, et al. (E).
- the vertical axis is the induced voltage value, and the horizontal axis is time.
- the broken double horizontal arrow indicating the length to the vertical axis shown by the broken line is the lap time 2 5 required for the ion immediately after the incident to go around the design orbit 4a. That is, the circumference of vacuum duct 4.
- Fig. 7 (A) shows the state immediately after the ion beam 3 accelerated to a certain energy level by the pre-stage accelerator 1.7 is incident on the vacuum duct 4 multiple times.
- the incident ion beam 3 exists as an ion beam 3 in the form of a DC beam over the entire design trajectory 4 a.
- the lap time 25 is 10 seconds
- the circulatory frequency at the time of incidence is about 100 000 uranium ions.
- Fig. 7 (B) shows a method of confining the ion beam 3 existing in the entire design trajectory 4a into a plurality of ion beams 3 by the barrier voltage applied by the confinement induction cell 10 Is shown.
- the solid horizontal double arrow between the negative and positive barrier voltage 2 6 and 2 7 indicates the barrier voltage generation interval 30.
- the solid horizontal double arrows indicating the negative barrier voltage mean the interval between the generation of the same-polarity barrier voltage (hereinafter referred to as the same-polarity barrier voltage generation interval 3 1). To do.
- each ion beam 3 is applied with an acceleration voltage 28 of 28a. It can be shortened more efficiently.
- Barrier of confinement induction cell 10 If voltage application time 26a and 27a are sufficiently less than 0.5 ⁇ s each, it can be divided into 10 ion beam 3 fragments. You can ⁇ Fig. 7 (C) shows a method of turning the fragmented ion beam 3 into a plurality of punches 3a. In addition to gradually shortening the rear voltage generation interval 30, it is also possible to receive the acceleration voltage 28 by shortening the same-polar barrier-voltage generation interval 31.
- punch interval 3 2 the negative barrier generated after the positive barrier voltage 27 is reduced. Shorten the interval of one voltage 26 and bring the confined punches 3a closer together.
- FIG. 7 (D) shows a process in which a plurality of punches 3 a formed by dividing the ion beam 3 are combined to form a single punch 3 a.
- Neighboring punch 3a, or first negative barrier voltage 2 6 of multiple bunch 3a and last positive barrier voltage 2 other than positive negative voltage 2 7b By not applying 2 7 b, multiple punches 3 a can be combined.
- the negative and positive barrier voltages 2 6 b 2 7 b that are not applied are selected by the digital signal processor for confinement 1 1 1 of the confinement intelligent controller 1 1 1 It is possible to generate the confinement gate signal pattern 1 la in real time according to the processing method programmed according to the reached energy level. Similarly, selection of unnecessary acceleration voltage 28 b and reset voltage 29 b, and application stop are calculated by the intelligent controller for acceleration 14.
- the punch 3 a is confined or connected within the range of the application time 2 8 a of the acceleration voltage 28 of the induction cell 1 3 for acceleration.
- the ion beam 3 can be set up more efficiently by controlling the generation of the acceleration intelligent 9 controller 14. It can be accelerated to energy levels.
- Fig. 7 (E) shows the ion beam 3 as a single unit 3a (contains 0 ), confined and accelerated.
- the ion beam 3 is accelerated to the set energy level more efficiently than the confinement and acceleration methods shown in Figs. 5 and 6. You will be able to do this.
- Such a method can be adopted because the drive frequency of the switching power supply 9 b 1 2 b for confinement and acceleration can be freely changed from 0 Hz to 1 megahertz.
- Fig. 8 is a diagram showing an ion beam acceleration method using a plurality of induction accelerating cells.
- the barrier voltage is relatively high at short application times 26a and 27a
- the acceleration voltage 28 is relatively low at long application times 28a
- the reset voltage 29 is An application time of 2 9 a and a voltage value are required so that it is energetically equivalent to the acceleration voltage of 2 8.
- the above requirement can be satisfied. Therefore, the operation pattern when using the three induction and acceleration cells 10 and 1 3 for confinement and acceleration will be described below. According to this method, the degree of freedom in ion selection and energy level selection can be increased.
- FIG. 8 (A) shows the magnitude of the barrier one voltage given by the triple induction accelerating cell 10 for confinement and the application time.
- the vertical axis represents the induced voltage value
- the horizontal axis represents the barrier voltage application time 26a, 27a.
- (1), (2) and (3) mean the first confining induction acceleration cell 10, the second confinement induction accelerating cell 10 and the third confining induction accelerating cell 10, respectively.
- . (4) shows the total negative and positive barrier voltages 2 6 f and 2 7 f applied to the ion beam 3 by the triple confinement induction cell 10.
- the negative barrier voltage 1 6c, 2 6d, 2 6 Apply e.
- the negative barrier voltages 26 c, 26 d, and 26 e may be applied almost simultaneously.
- positive barrier voltage 2 7 c, 2 7 d, 2 7 e is applied to the notch tail 3 d. Therefore, the notch head 3c and the notch tail 3d are equal to the total negative and positive barrier voltages 26f and 27f shown in (4).
- One voltage is applied to punch 3a.
- the necessary barrier voltage can be obtained effectively by connecting the induction accelerating cells 10 for confinement. In other words, even if the barrier voltage values 2 6 g and 27 g applied by each confining induction accelerating cell 10 are low, the high barrier voltage values 2 6 h and 2 7 h are You can get it.
- FIG. 8 (B) shows the size and application time of the induction dielectric for acceleration provided by the triple acceleration induction cell 13.
- the vertical axis is the induced voltage value for acceleration.
- the axis means the application time of induction voltage for acceleration 2 8 a, 2 9 a.
- (1), (2), and (3) mean the first acceleration induction cell 13, the second acceleration induction cell 13, and the third acceleration induction cell 13, respectively.
- (4) shows the total acceleration voltage 28 f and the total reset voltage 29 f applied to the punch 3 a by the triple acceleration induction acceleration cell 13.
- acceleration voltage 2 8 c, 28 d, 28 e Apply.
- acceleration voltages 28 c, 28 d, 28 e can be applied to the entire ion beam 3 by shifting the mark time as shown in (1) force, et al. (3). . Therefore, the application time 28 g of the total acceleration voltage 28 f shown in (4) can be secured in the entire ion beam 3.
- a long application time 2 8 can be obtained by connecting the acceleration induction cells 1 3 in this way. It becomes possible to secure a. In other words, it is possible to meet the two objectives of confinement and acceleration only by combining a common standard induction accelerating cell capable of generating a low induced dielectric pressure. Therefore, the manufacturing cost of the induction accelerator can be kept low.
- the reset voltage 2 9 c, 2 9 d, 2 9 Apply e.
- the reset voltage of 29 g is generated in each acceleration induction cell 13 because it is necessary to avoid magnetic saturation of each acceleration induction cell 13. Theoretically, it can be used as the time to apply the high speed voltage 28 except for the time period in which the reset voltage 29c, 29d, 29e is applied. It is possible to accelerate all kinds of ions as a super punch 3 e.
- the switching voltage generation interval 3 0 is used as the switching power supply 9 b for the closing, and the switching gate signal pattern 1 1 a for the switching element used for the switching power supply 9 b is freely controlled. Therefore, punch 3a, which was impossible in principle with conventional high-frequency synchrotron 35, can be held in a long state in the direction of travel, so it can be accelerated at once. The number of ions increased significantly.
- Fig. 9 shows all existing KEK 5 OOM e VPS and 12 G e VPS according to the present invention. It is a diagram showing the results of calculating the ultimate energy per nucleon of various ions with the maximum valence, which is possible at the back of the ion accelerator.
- the source of the ion beam 3 is H (hydrogen), C (carbon), N (nitrogen) ⁇ Ne (neon), A 1 (aluminum), C a (calcium), O (oxygen) ), Mg (magnesium), Ar (argon), Ni (nickel), Zn (zinc), K ⁇ (krypton), Xe (xenon), Er (enorubi) ), Ta (tannole), Bi (bismuth), U (cran), Te (tenorenor). ', Cu (copper), Ti (titanium), etc.
- the horizontal axis of the graph is the atomic number. From left to right, the graph starts from the smallest atomic number.
- the vertical axis of the graph represents the amount of energy per nucleon accelerated or predicted at each acceleration. 'The unit of the left axis is Megavolt (MeV). The unit of the axis is Gigabol ⁇ (G e V), and the right axis is used only when referring to the result of the modified 1 2 G e VPS
- ION Beam 3 has been accelerated in the ring cyclone P operated by RIKEN, which is the largest cyclotron in Japan.
- the circle surrounded by the broken line is the maximum energy level of the various ion beams 3 when the various ion beams 3 are incident on the cyclotron 3 3.
- the ion beam 3 reaches the same energy level.
- the conventional strong convergence method is used for the confinement in the direction perpendicular to the travel axis of the ion. O It is not possible to use an electromagnet driven by a pattern control power supply. The outgoing energy is variable. In a rapid cycle synchrotron using an electromagnet driven by a resonant circuit, the acceleration energy per nucleon is the mass of the ion. Determined by number and valence
- 500 MeVPS (country, country) powers the energy and region that cannot be reached by conventional sig- rons.
- the acceleration distance of the high frequency linear accelerator 17 b and the physical characteristics of the cycle iron electro Limits the ions that can be accelerated due to
- the ions that can be accelerated are from protons to Ta, and the energy reached is 7
- the improved 1 2 G e V PS can raise all ions to more than about 4 G e V per nucleon.
- the all-type ion accelerator 1 of the present invention it is possible to use the conventional cyclotron and high-frequency sink rotons 3 5 including all the straight lines that are impossible. Species can easily be increased to any energy level, industrial applicability
- the present invention has the above-described configuration, the following effects can be obtained.
- the conventional high-frequency synchrotron 35 can be reused as it is with a device other than the inter-frequency accelerator 3 6 as it is.
- the cost can be changed to the all-type ion accelerator 1 according to the present invention at a cost.
- a single all-ion accelerator 1 can accelerate all types of ions to any energy level.
- the 500 M e VPS is currently the largest physics and chemistry.
- Various energy levels that cannot be reached by the laboratory's cyclotron On the other hand, with 12 G e VPS, all ions can be accelerated up to about 4 G e V per nucleon.
- the all-type ion accelerator according to the present invention since it is not only a carbon beam that has recently been supplied for cancer treatment ⁇ a heavier heavy ion of any valence state. Since ON can be supplied, the number of target areas for particle beam cancer treatment will increase significantly, and the degree of freedom of treatment will increase. In addition, the scope of medical RI manufacturing, activation analysis with short-lived nuclei, and semiconductor damage testing is greatly expanded, and the heavy ion cosmic rays of various electronic devices mounted on the% r pan used in outer space. This makes it possible to perform ground tests to predict damage.
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EP06745582A EP1876870A4 (en) | 2005-04-27 | 2006-04-18 | ION ACCELERATOR FOR ALL SPECIALS AND CONTROL PROCEDURES THEREFOR |
AU2006242025A AU2006242025B2 (en) | 2005-04-27 | 2006-04-18 | All-species ion accelerator and control method thereof |
CN2006800141003A CN101167413B (zh) | 2005-04-27 | 2006-04-18 | 全离子加速器及其控制方法 |
KR1020077027562A KR101173332B1 (ko) | 2005-04-27 | 2006-04-18 | 이온빔 가속방법 |
US11/912,986 US8084965B2 (en) | 2005-04-27 | 2006-04-18 | All-Ion accelerator and control method of the same |
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JP2005129387A JP3896420B2 (ja) | 2005-04-27 | 2005-04-27 | 全種イオン加速器及びその制御方法 |
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JP3307059B2 (ja) * | 1994-03-17 | 2002-07-24 | 株式会社日立製作所 | 加速器及び医療用装置並びに出射方法 |
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JP3602985B2 (ja) * | 1999-07-29 | 2004-12-15 | 株式会社日立製作所 | 円形加速器の制御方法及び制御装置 |
JP3705091B2 (ja) * | 2000-07-27 | 2005-10-12 | 株式会社日立製作所 | 医療用加速器システム及びその運転方法 |
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KR100493164B1 (ko) * | 2002-12-14 | 2005-06-02 | 삼성전자주식회사 | 전자기 유도 가속기 |
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2006
- 2006-04-18 WO PCT/JP2006/308502 patent/WO2006118065A1/ja active Application Filing
- 2006-04-18 AU AU2006242025A patent/AU2006242025B2/en not_active Ceased
- 2006-04-18 US US11/912,986 patent/US8084965B2/en not_active Expired - Fee Related
- 2006-04-18 CN CN2006800141003A patent/CN101167413B/zh not_active Expired - Fee Related
- 2006-04-18 EP EP06745582A patent/EP1876870A4/en not_active Withdrawn
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JP2000232000A (ja) * | 1999-02-12 | 2000-08-22 | Mitsubishi Electric Corp | Rf制御装置およびその応用システム |
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TAKAYAMA K.: "Yudo Kasoku Synchrotron no Jissho to sono Oyo", NIPPON BUTSURI GAKKAISHI, vol. 59, no. 9, 5 September 2004 (2004-09-05), pages 601 - 610, XP003005266 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007069749A1 (ja) * | 2005-12-16 | 2007-06-21 | Inter-University Research Institute Corporation High Energy Accelerator Research Organization | 誘導加速装置及び荷電粒子ビームの加速方法 |
US8456110B2 (en) | 2005-12-16 | 2013-06-04 | Inter-University Research Institute Corporation | Induction accelerating device and acceleration method of charged particle beam |
Also Published As
Publication number | Publication date |
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JP2006310013A (ja) | 2006-11-09 |
CN101167413A (zh) | 2008-04-23 |
JP3896420B2 (ja) | 2007-03-22 |
AU2006242025B2 (en) | 2010-09-09 |
US20090195194A1 (en) | 2009-08-06 |
CN101167413B (zh) | 2010-12-15 |
KR101173332B1 (ko) | 2012-08-10 |
KR20080012900A (ko) | 2008-02-12 |
EP1876870A1 (en) | 2008-01-09 |
EP1876870A4 (en) | 2011-12-21 |
US8084965B2 (en) | 2011-12-27 |
AU2006242025A1 (en) | 2006-11-09 |
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