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Influence of the cathode position on beam current characteristics in the thermionic electron gun 被引量:1
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作者 Jikang Fan Jian Zhang +4 位作者 Haiying Xu Yong Peng Xinghua Sang Qi Zhou Kehong Wang 《Radiation Detection Technology and Methods》 CSCD 2022年第3期401-408,共8页
Purpose The research focuses on the simulation of influence of cathode positions on beam current characteristics in the thermionic electron gun.Methods The electricfield distribution,bias voltage range and electron beam... Purpose The research focuses on the simulation of influence of cathode positions on beam current characteristics in the thermionic electron gun.Methods The electricfield distribution,bias voltage range and electron beam quality under different cathode positions were simulated by CST software.Results Changes in the cathode position can cause changes in the electricfield distributions under the cathode emission surface change,thereby changing the size of the effective emitting area and affecting the relationship between the bias voltage and beam current.Conclusions Only when the cathode is installed in the proper positions,the beam current and the bias voltage have an approximately linear proportional relationship.When the cathode is installed improperly,the electron beam emission is disordered,resulting in decreased electron beam quality. 展开更多
关键词 SIMULATION Thermionic electron gun cathode position Beam current characteristics
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