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Energy regulation method for traveling wave electron linear accelerator

A linear accelerator and energy adjustment technology, applied in the direction of linear accelerators, electrical components, accelerators, etc., can solve the problem of reducing the efficiency of electron capture and transmission, and achieve the effect of improving the efficiency of capture and transmission

Inactive Publication Date: 2013-02-20
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the prior art, adjusting the electron current intensity to adjust the output energy of the accelerator can be controlled by adjusting the voltage between the cathode and anode of the diode electron gun, but the electron energy at the entrance of the accelerating tube will also change greatly, and the electron energy at the entrance of the accelerating tube There is a certain range limitation. If the energy is too high or too low, the efficiency of electron capture and transmission will be reduced. If the electron current intensity can be adjusted while keeping the energy at the entrance of the accelerating tube constant, this problem can be solved.

Method used

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  • Energy regulation method for traveling wave electron linear accelerator
  • Energy regulation method for traveling wave electron linear accelerator
  • Energy regulation method for traveling wave electron linear accelerator

Examples

Experimental program
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Effect test

Embodiment 1

[0020] The main components of the electron linear accelerator are as image 3 As shown, it includes electron gun, accelerating tube, klystron, pulse modulator, solid-state source, microwave waveguide, control system, vacuum system, focusing system and water cooling system and other auxiliary systems. The control system provides the starting, boosting, beam output, beam stop, voltage reduction and shutdown of the pulse modulator and electron gun. The pulse modulator provides high-voltage pulses to the electron gun and the klystron at the same time. The solid-state signal source provides the microwave excitation signal to the klystron. The microwave power output by the klystron is transmitted to the accelerating tube through the waveguide, and a microwave accelerating field is established to accelerate the electron beam generated by the electron gun and input into the accelerating tube to the required energy. The focusing system provides focusing force and reduces the loss of ...

Embodiment 2

[0025] The difference from Example 1 is that while adjusting the gate voltage of the electron gun, the output high voltage of the modulator is fine-tuned to adjust the output energy of the traveling-wave electron linear accelerator, which can further improve the reduction in the electron beam capture and transmission efficiency. For the 10MeV traveling wave electron linear accelerator, the gate control voltage of the electron gun is adjusted and the high voltage of the modulator is fine-tuned, the output energy range is: 6~12MeV, and the transmission efficiency is reduced by no more than 20%.

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Abstract

The invention belongs to the technical field of accelerators, and discloses an energy regulation method for a traveling wave electron linear accelerator. According to the method, the grid control voltage of an electron gun is regulated, or the grid control voltage of the electron gun and the output high voltage of a fine tuning modulator are simultaneously regulated, thus regulating the energy output of a traveling wave electron linear accelerator. The method can realize the energy output of the traveling wave electron linear accelerator in a wide range.

Description

technical field [0001] The invention belongs to the technical field of accelerators, in particular to a method for adjusting the energy of a traveling wave electron linear accelerator. Background technique [0002] Electron linear accelerators are mainly used in radiotherapy devices, non-destructive detection and imaging systems for material resolution, object irradiation and other fields. In these applications, the tunability of the electron beam energy is of great significance. [0003] There are generally three ways to achieve multi-energy output from the same accelerator, one is to change the field strength of the microwave accelerating electric field, the other is to change the electron current intensity, and the third is to change the phase of the microwave acceleration. For an accelerator composed of a section of traveling wave accelerating tube, the speed of electrons in an accelerating tube increases from non-relativistic speed to relativistic speed, and the speed ...

Claims

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Application Information

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IPC IPC(8): H05H9/02
Inventor 李金海朱志斌韩广文张立锋马雁云王修龙吕卫星
Owner CHINA INSTITUTE OF ATOMIC ENERGY