JPH02312198A - Beam current adjusting device for accelerator - Google Patents

Abstract

PURPOSE:To readily grasp correlation between a beam current and plural adjusting parameters by providing means for indicating correlation between two adjusting parameters selected and a beam current value on a two-dimensional coordinates. CONSTITUTION:When an operator pushes down a key indicating e.g. adjusting parameters C1, C2, the adjusting parameters C1, C2 are indicated in cross and longitudinal shafts on a screen, respectively, and are selected as parameters A and B. A present value marker 23 is disposed alone a color scale 22, and a marker 2 indicates the black position of the scale 22 at an initial stage. A black dot is also displayed on a two-dimensional coordinates, and correlation between the parameters A, B selected and the beam current value is displayed. Under this condition, a track ball 9 is scanned in the x direction or in the y direction whereby dots on a display 7 describes such an orbit 15 that may be varied from blue green, blue, blue green, yellow, orange to red. Thus correlation between the adjusting parameters C1, C2 and the beam current is intuitively grasped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an accelerator, and particularly to a beam current adjustment device for an accelerator.

[Prior Art] Conventionally, this type of accelerator beam current adjustment device is used to adjust the beam current in an accelerator such as a cyclotron. Generally, the beam current of an accelerator varies depending on a number of adjustment parameters in the electromagnetic power supply, the radio frequency device, the ion source, the deflector, etc. Furthermore, these adjustment parameters have a mutual correlation, and it is almost impossible to quantify all of these correlations. For this reason,
Conventionally, the operator selects and adjusts one of the adjustment knobs provided in response to each adjustment parameter, adjusts it so that the measured value of the beam current is maximized while looking at the beam ammeter, and then adjusts the next adjustment parameter. The same operation was repeated in response to the

[Problems to be Solved by the Invention] However, when using such an adjustment device, the operator must have a high level of skill because he or she must make adjustments by looking at the beam ammeter for each adjustment parameter. .

For example, as shown in Fig. 4, when adjusting the adjustment parameter C1 of the electromagnet power supply during operation, and then adjusting the adjustment parameter C2 of the high frequency device, due to the correlation between both parameters, the adjusted electromagnet power supply is first adjusted. Adjustment parameter C
It often happens that a value of 1 does not necessarily give the maximum beam current. Therefore, it is necessary to further readjust the :A adjustment parameter C1 of the already adjusted electromagnet power source to find the maximum value of the beam current taking into account the correlation between both parameters C1 and 02. Since such operations are necessary for each parameter, there are disadvantages in that the operability is poor and the work time is required.

Therefore, in view of the above-mentioned drawbacks, the technical problem of the present invention is to
This is a beam current adjustment device for accelerators that does not require operators to have any operating skills and allows them to easily understand and monitor the correlation between the beam current and multiple adjustment parameters, improving operability and reducing work time. It is about providing.

[Means for Solving the Problems] According to the present invention, in an accelerator beam current adjustment device for adjusting a beam current value of an accelerator that changes depending on a plurality of adjustment parameters, among the plurality of adjustment parameters, comprising a selection means for selecting any two adjustment parameters, and a display means for displaying the correlation between the two selected adjustment parameters and the beam current value on two-dimensional coordinates, A beam current adjustment device for an accelerator is obtained, characterized in that the beam current is displayed on the display means in a color corresponding to the magnitude of the beam current value.

Further, in the beam current adjustment device for an accelerator, a memory for varying the values of the two arbitrary adjustment parameters within a predetermined range and storing a trajectory drawn by a beam current value corresponding to the values of the two adjustment parameters. A beam current adjustment device for an accelerator is obtained, comprising means for displaying the locus on the display means.

Furthermore, in the beam current adjustment device for an accelerator, an external device that simultaneously changes and sets the display position of the beam current on the two-dimensional coordinates corresponding to any two adjustment parameters among the plurality of adjustment parameters is provided. A beam current adjustment device for an accelerator characterized by having an input device is obtained.

[Examples] Examples of the present invention will be described below with reference to the drawings.

The beam current adjustment device for an accelerator according to the present invention shown in FIG. 1 (broken line block 100 in FIG. 1) converts the beam current value measured by the detector 12 attached to the cyclotron 1 into an analog signal. It is provided with an AD converter 6 for receiving and outputting as a digital signal, and a selection switch 11 provided corresponding to a plurality of adjustment parameters and configured to be able to select any two parameters from these adjustment parameters. Furthermore, selection switch 1
A switch input interface 10 inputs and outputs the selection signal from 1 to other devices via a bus under the control of the CPU 4, and displays the correlation between the two selected adjustment parameters and the beam current value on two-dimensional coordinates. A color graphic display 7 is provided for display. The illustrated embodiment also includes a trackball 9 that can two-dimensionally simultaneously change and set the position of the beam current on two-dimensional coordinates corresponding to any two adjustment parameters among a plurality of adjustment parameters; A trackball interface 8 that inputs and outputs input signals from 9 to other devices, stores the values of two adjustment parameters that are varied within a predetermined range, and the actual beam current values that correspond to the values of these adjustment parameters. Accordingly, it has a memory 13 that stores a history between adjusted parameters and beam current values.

Referring to FIG. 2, the color scale 22 of the beam current value corresponding to the values of the two adjustment parameters is displayed on the color graphic display 7 (for example, the minimum value of the beam current value; 0 μA is black, the maximum value 10 μA is red). ), a current value marker 23 indicating the current value of the beam current value is displayed on the color scale 22, and a current value 24 indicating the current value of the beam current value in the form of a numerical value is also displayed. has been done.

The operation of the accelerator beam current adjustment device according to the present invention will be explained.

First, the operator presses a key that selects any two parameters among the many parameters arranged on the selection switch 11, for example, adjustment parameter C13 [parameter C2]. The result is: A! 1, the parameter C1 and the adjustment parameter C2 are selected as the parameters A and B displayed on the horizontal and vertical axes on the screen, respectively.

A current value marker 23 is arranged along the color scale 22, and the current value marker 23 initially indicates the black position of the color scale 22.

On the other hand, black dots are also displayed on the two-dimensional coordinates, and the correlation between the selected parameters A and B and the beam current value is displayed. In this state, when the trackball 9 is scanned in the X or Y direction, the dots on the color graphic display 7 draw a trajectory 15 that changes from blue-green to blue to blue-green to yellow to mostly red.

In this way, two adjustment parameters C1 are displayed on two-dimensional coordinates.
and the correlation with the adjustment parameter C2.
5, the correlation between the adjustment parameter C1, adjustment parameter C2, and beam current can be intuitively grasped. Furthermore, since the maximum value of the beam current is indicated in red, the adjustment parameters C1 and C2 can be easily adjusted intuitively to make the beam current the maximum value.

Thereafter, the parameters can be changed one after another in the same manner to obtain the maximum value of the beam current value for many parameters.

By finely manipulating the 21 parameter C1 and the adjustment parameter C2, a two-dimensional map on contour lines as shown in FIG. 3 can be obtained.

Therefore, if the correlation is well understood, the maximum value of the beam current can be determined by drawing a relatively linear trajectory.

On the other hand, for cases where the correlation is unclear, the maximum value of the beam current may be determined after obtaining a two-dimensional malep by finely manipulating the parameters two-dimensionally.

[Effects of the Invention] As is clear from the above description, according to the present invention, the correlation between the beam current of the accelerator and a plurality of adjustment parameters can be easily grasped and monitored, the operability is improved, and the working time is reduced. This has the effect of providing an accelerator beam current adjustment device that is useful for reducing the current.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an accelerator beam current adjustment device and its surroundings according to an embodiment of the present invention, and FIG. 2 is a diagram showing an operation panel having a color graphic display, a trackball, and a selection switch. FIG. 3 is a diagram showing a two-dimensional map of the beam current drawn on the color graphic display of FIG. 1, and FIG. 4 is a diagram showing the relationship between the conventional accelerator beam current value and elapsed time. In the figure, 1... cyclotron, 2... cyclotron control device, 4. -... CPU, 5... Communication interface, 6... AD converter, 7... Color graphic display, 8... Trackball interface, 9... Trackball, 10... Switch input interface, 11...Selection switch, 12
...beam current detector, 13...memory, 15...
- Trajectory drawn by beam current values corresponding to the values of the two adjustment parameters, 22... Color scale, 23
...Current value marker, 24...Current value display, 25...
- Parameter name display, 26... Parameter current value display, 100... Accelerator beam current adjustment device. Figure 3 Figure 4

Claims (1)

[Claims] 1. In an accelerator beam current adjustment device for adjusting an accelerator beam current value that changes depending on a plurality of adjustment parameters, any two adjustment parameters among the plurality of adjustment parameters. and a correlation between the two selected adjustment parameters and the beam current value.
A display means for displaying on dimensional coordinates, the detected beam current being displayed on the display means in a color corresponding to the magnitude of the beam current value. Device. 2. The accelerator beam current adjustment device according to claim 1, wherein the values of the two arbitrary adjustment parameters are varied within a predetermined range, and a trajectory is drawn by beam current values corresponding to the values of the two adjustment parameters. A beam current adjustment device for an accelerator, comprising a storage means for storing the trajectory, and displaying the locus on the display means. 3. The accelerator beam current adjustment device according to claim 2, wherein the display position of the beam current on the two-dimensional coordinates corresponding to any two adjustment parameters among the plurality of adjustment parameters is changed two-dimensionally simultaneously. A beam current adjustment device for an accelerator, comprising an external input device for setting.