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On-line adjustment system and adjustment method of beam current intensity in central area of ​​proton cyclotron

A cyclotron, current strong online technology, applied in the direction of magnetic resonance accelerators, accelerators, electrical components, etc., can solve the small beam deflection effect of the axial deflection plate, difficult to achieve electrical insulation of the axial deflection plate, and power line routing Problems such as difficult line arrangement, to achieve fast, reliable and efficient adjustment of beam current intensity, simple structure, and easy operation

Active Publication Date: 2020-05-19
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

[0004] However, in the above technical solution, the axial deflection plate and the axial collimator are placed on the surface of the magnetic poles in the center of the accelerator, the space is narrow, the electrical insulation of the axial deflection plate is difficult to achieve, the wiring of the power line is difficult to arrange, and the axial deflection The beam deflection effect is weak due to the small opening angle of the plate, and the axial deflection plate and the axial collimator require additional positioning mechanical structures

Method used

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  • On-line adjustment system and adjustment method of beam current intensity in central area of ​​proton cyclotron
  • On-line adjustment system and adjustment method of beam current intensity in central area of ​​proton cyclotron
  • On-line adjustment system and adjustment method of beam current intensity in central area of ​​proton cyclotron

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Embodiment 1

[0029] like figure 1 As shown, the beam intensity online adjustment system in the central area of ​​the proton cyclotron includes a high-frequency cavity 1 arranged in the central area of ​​the proton cyclotron, a set of axial deflection plates 2 and an axial collimator 3, and is also provided with a A power supply that supplies a voltage to the deflection plate 2 . The axial deflection plate 2 is located in the head of the high-frequency cavity 1, and the axial collimator 3 is placed in the head of another high-frequency cavity 1 in the central area of ​​the proton cyclotron, and the installation angle is 180 degrees away from the axial deflection plate 2 .

[0030] like figure 2 As shown, the axial deflection plate 2 is embedded in the head structure of the high-frequency cavity 1 in the central area of ​​the proton cyclotron, and is insulated from the high-frequency cavity 1. The wire passes through the wall of the high-frequency cavity 1 and is connected to the power su...

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Abstract

The invention relates to an online adjusting system for a beam current intensity in a central area of a proton cyclotron, which belongs to the field of proton cyclotrons. The online adjusting system is characteized in that an axial deflection plate and an axial collimator are respectively arranged in two high-frequency cavity head parts which form an angle of 180 degrees in the central area of theproton cyclotron, the axial deflection plate is connected with a power supply arranged outside the cyclotron by virtue of a cable, the voltage on the axial deflection plate is adjusted, so that the beam current is axially deflected, particles with excessively large deviation are lost on the axial collimator, and a function for online adjusting the beam current intensity can be realized. The online adjusting system have the advantages of simple structure, high reaction speed and high reliability, and can improve the beam current intensity adjusting efficiency.

Description

technical field [0001] The invention relates to the field of proton cyclotrons, in particular to an online adjustment system and method for beam current intensity in the central area of ​​a proton cyclotron. Background technique [0002] The application fields of proton cyclotrons, such as proton beam radiation therapy and single event effect testing, require the intensity of the proton beam extracted from the accelerator to be adjustable, and some applications require fast on-off and fast modulation of the beam on the order of microseconds. The traditional method of current intensity adjustment is to change the number of particles entering the accelerator and the beam current intensity by adjusting the gas output or voltage of the ion source. It is sensitive and does not have a good linear relationship. This method is difficult to quickly adjust the beam current intensity to a given value. Another method is to place a certain thickness of the beam block on the beam line at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05H13/00H05H7/00H05H7/12
CPCH05H7/001H05H7/12H05H13/005H05H2007/002H05H2007/004H05H2007/122
Inventor 张东昇贾先禄李要乾殷治国郑侠
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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