Millimeter wave generation from a pseudospark-sourced electron beam
Millimeter wave generation from a pseudospark-sourced electron beam
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DOI：
10.1063/1.3155444
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发表时间：
2009-06
影响因子：
2.2
通讯作者：
H. Yin;A. Cross;Wenlong He;A. Phelps;K. Ronald;D. Bowes;C. Robertson
中科院分区：
文献类型：
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作者：
H. Yin;A. Cross;Wenlong He;A. Phelps;K. Ronald;D. Bowes;C. Robertson
本文对多间隙赝火花放电电子束的产生和传输进行了实验研究。从一个三间隙的赝火花，一个光束高达680 A的测量在阳极在所施加的直流电压为23千伏。该电子束可以在没有引导磁场的气体环境中向下游传播远至20 cm，这证实了电子束的传输是基于由于电子束本身对气体分子的电离而导致的电子束的空间电荷的中和。该光束直径为1-3 mm，非常小，非常适合驱动高频辐射。更高的能量的电子束脉冲产生使用14间隙pseudospark放电供电的电缆脉冲发生器能够产生120 ns的持续时间和170 kV的电压脉冲。所测量的光束具有高达110 A的电流。模拟和设计了产生的光束与Ka波段切伦科夫脉塞和W波段返波振荡器慢波结构的相互作用。在切伦科夫脉塞和返波振荡器的注波互作用实验中探测到了毫米波脉冲。
Experimental studies of the production and propagation of an electron beam from a multigap pseudospark discharge are presented. From a three-gap pseudospark, a beam up to 680 A was measured at the anode at an applied dc voltage of 23 kV. This beam can propagate downstream as far as 20 cm in a gaseous environment with no guiding magnetic field, which confirms that the transport of the electron beam was based on the neutralization of the space charge of the electron beam due to the ionization of the gas molecules by the beam itself. The beam is of very small size of 1-3 mm in diameter and is ideal to drive high frequency radiation. Higher energy electron beam pulses were generated using a 14-gap pseudospark discharge powered by a cable pulser capable of producing 120 ns duration and 170 kV voltage pulses. The beam measured had a current of up to 110 A. Interactions between the produced beam and a Ka-band Cherenkov maser and a W-band backward wave oscillator slow wave structure were simulated and designed. Millimeter wave pulses were detected from the Cherenkov maser and backward wave oscillator beam-wave interaction experiments.