强激光与粒子束, 2005, 17 (7): 1091, 网络出版: 2006-04-28
用于强流直线感应加速器的大面积储备式阴极
Large area dispenser cathode applied to high current Linac
直线感应加速器 二极管 储备式热阴极 电流密度 Linac（linear induction accelerator） Diode Thermionic dispenser cathode Current density
摘要
介绍一种直径为φ55 mm的锇膜(411M)储备式热阴极,并以此为基础,建立了一套脉冲电压幅度为200 kV、脉冲平顶宽度大于等于2 μs的长脉冲功率源以及配套的加热系统与高压隔离网络电路.在阴极灯丝工作电流18 A,阴极温度1 165 ℃,二极管电压75 kV条件下,在该阴极试验平台上获得52 A的空间电荷限制流,实验结果与理论计算基本吻合.实验中还发现,阴极的放气源将严重影响阴极发射能力.
Abstract
The paper introduced a dispenser cathode (411 M) which was 55 mm in diameter. A 200 kV long pulsed power generator with 2 μs flattop based on Marx-PEN and system with heat and voltage insulation were built. A 52 A space charge limited current was gained, when the temperature was 1 165 ℃ and the filament current was 18 A on the cathode and the voltage of the pulse was 75 kV at the cathode test stand. Experimental results show that the current values is consistent with the numerical simulation. The experiment reveals that the deflated gas will influence the cathode emittion ability.
杨安民, 伍登学, 刘承俊, 夏连胜, 王文斗, 张开志. 用于强流直线感应加速器的大面积储备式阴极[J]. 强激光与粒子束, 2005, 17(7): 1091. YANG An-min, WU Deng-xue, LIU Chen-jun, XIA Lian-sheng, WANG Wen-dou, ZHANG Kai-zhi. Large area dispenser cathode applied to high current Linac[J]. High Power Laser and Particle Beams, 2005, 17(7): 1091.
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