JPS582800A - Current measuring circuit for target incidence beam - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circuit for measuring the current of a beam incident on a target of a particle beam accelerator using a measuring element.

Configuration 11 of the target section of a conventional particle accelerator is shown in the first stage. In this Fig. 1, lσx*w# is the raw targtu? , grz This is a cooling pipe for cooling, and is fixed to this cooling pipe 2 with a fixed angle 8. The fixed angle 8 is fixed to the housing 4. The housing 4σ is electrically at ground level.◎ Next, the operation will be explained. The electron beam E accelerated by the accelerator KL is guided by the guidance system to 19 targets (1) and collides with it. This is a tag that emits KL9X@A) L
tC The collided electron beam flows into the cooling pipe 2, the fixed angle 311, and the electrical ground level housing 4. Therefore, the target incident beam σ cannot be constant. I had to dismantle the σ target s and set another beam 4 rectifier to the measuring element.

This invention has been made to eliminate the drawbacks of the above-mentioned devices, such as not being able to measure the target incident beam during electron beam generation. Level casing, floating 7Qh ding (KL) with v insulator, efficiency of beam adjustment,
4 monitors the incident beam on the target while the electron beam is being generated.
C219, provides a current measurement circuit for the target incident beam that can check the operating status of the device and detect the Imperial Palace.
For the purpose of c., an actual example of the current measuring circuit of the target incident beam of the present invention will be explained below based on the other aspects.

Il! ! ! The figure shows a cross section of the target part and a measurement circuit, an example of which is shown in the figure. In this figure #12, the target 11 that occurs with xism, the cooling pipe 2 that cools this target, the cooling pipe 21 fixed at a fixed angle 8, and the housing 4σ electrically at ground level.
11th! It is the same as iI.

An insulator 5 is interposed between the casing 4 and the fixed angle 8 circle IIc, and the 19 fixed angle 8 is fixed to the casing 4 via the insulator 5 to an insulating bolt 6.

In addition to this, the casing 4v1 is electrically at ground level.
The cooling pipe 2 and the fixed angle 8 are connected to the measuring cable 7 and the fixed angle 8,
A terminating resistor 8 for monitoring is connected to the tip of the measuring cable 7. A frame protection resistor 9 is connected between the fixed angle 8 and the casing 40.

゛ Next, the operation of the target incident beam current measurement circuit of the present invention configured as described above will be explained.
19 The accelerated electron beam Eσ is guided to the target l by the guidance system and collides with it.
9 Fixed angle sv flows ◎ Fixed angle 8, housing 4 and a insulator 5! Since the electron beam current (a) is insulated, the electron beam current (a) is insulated from the cable 7'rff and flows through the terminating resistor 8 into the housing 4 at ground level. The resistance value of the terminating resistor 8e is smaller than that of the frame protection resistor 91. If we measure the voltage across the insulation resistance 80, we can see that the current value of the incident electron beam E on the target during generation of σ electrons in the X@A box is +1. If the current side of the circuit is 1, it will raise the entire target part to the electrical ground level. Therefore, it is possible to perform operational confirmation and diagnosis at 161j positions for streamlining beam adjustment sx1m or for current measurement of a target incident beam during electron generation.

[Brief explanation of the drawing]

11!111α Cross-sectional view of the target part at particle acceleration fFK sjl! Figure 2 shows a cross-sectional view of the target part and measurement in an actual example of the current measurement circuit of the target incident beam according to the present invention. 8... Fixed angle, 4... Housing, 5... Insulator, 6... Insulating bolt, 7... Measurement cable, 8... Insulation resistance,...
protection resistance. In addition, the same symbol in the figure is the same as the frame -'! Mizuko 0 for the part corresponding to hole σ
・ - Agent Makoto Kuzuno - t 1 Figure 221 flash

Claims (1)

[Claims] A casing that is electrically at ground level, a fixed angle that is fixed to this casing via an insulator and floating above the electrical ground level, and an incident beam attached to this fixed angle with a WR collide! - A cooling pipe for cooling the generated target, a measurement cable connected to the fixed angle and guiding the incident beam current Rk, an incident beam current t flowing through this measurement cable, a measuring device, 4 means A current measurement circuit for the target incident beam.