An electron accelerator and a method for realizing an electron beam low fluence environment

An electron accelerator and electron beam technology, applied in the direction of measuring electrical variables, instruments, measuring electricity, etc., can solve the problem of high electron flux

CN103983874BInactive Publication Date: 2017-08-25XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-08-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an electron accelerator and a method for realizing a low-flux environment of electron beams. Through the method of porous attenuation, the electron accelerator is transformed into a low-flux environment that meets the requirements of the national military standard without changing the structure and control system of the accelerator. Space radiation environment ground simulation device. Through the Monte Carlo simulation calculation method and high-resolution measurement method, the electron beam energy spectrum, secondary radiation, and uniformity of the irradiation field after the electron beam flux is reduced by the attenuation method are studied, which can be adapted to the research of radiation effects on electronic components and materials and assessment methodological research requirements. The invention solves the technical problem of high electron flux when the existing electron accelerator conducts research on the radiation effect of electronic components.
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Description

technical field

[0001] The invention belongs to the application of nuclear technology in the field of aerospace electronics, and in particular relates to a simulation test environment and a corresponding method for realizing a low-flux radiation effect simulation test environment of an electron beam by using a multi-microhole attenuation shield. Background technique

[0002] The space radiation environment is mainly composed of galactic cosmic rays, radiation belts formed by geomagnetic trapping, and randomly occurring solar particle events. The geomagnetic trapping zone is mainly composed of protons and electrons, where the energy of electrons is between 0.1MeV and 5MeV, and the maximum fluence rate of electrons can reach 4E+7e / cm 2 s. Trapped band electrons can cause radiation damage to spacecraft materials, solar cells, sensors and integrated circuits. Therefore, electron beams are usually used on the ground to study the irradiation effects of spacecraft-related materia...

Examples

Embodiment Construction

[0030] The Monte Carlo programs adopted in the present invention are the application programs BEAMnrc, BEAMdp and DOSXYZnrc of the EGSnrc system, wherein BEAMnrc can be used to simulate the electron accelerator and the electron transport process in the beam exit window and the target material. BEAMdp is used to analyze and process the phase space files generated by BEAMnrc to obtain electron and photon energy spectrum information. DOSXYZnrc is used to simulate the incident of electrons on the phantom of Cartesian coordinates, and to record the energy deposited in each unit of the phantom. Three-dimensional dose distribution in the body. The dose measurement method used is a new type of chromogenic film dosimeter, and the spatial resolution of two-dimensional measurement can reach 10 microns.

[0031] The perforated plate is made of high-purity aluminum with a thickness of 5mm and a range of 4.5mm greater than 2MeV electrons in aluminum. The selection of low atomic number mate...