Improved electrostatic design for MILO cathodes

被引：43

作者：

Haworth, MD ^{[1
]}

Cartwright, KL ^{[1
]}

Luginsland, JW ^{[1
]}

Shiffler, DA ^{[1
]}

Umstattd, RJ ^{[1
]}

机构：

[1] Directed Energy Directorate, Air Force Res Lab, Kirtland AFB, NM 87117 USA

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2002年 / 30卷 / 03期

关键词：

anode plasma; focusing electrodes; high-power microwaves; magnetically insulated transmission line oscillator; (MILO);

D O I：

10.1109/TPS.2002.801550

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Recent experimental and computer simulation results on a magnetically insulated transmission line oscillator (MILO) have indicated that the large, beam-current density emitted from each end of the cathode leads to anode plasma formation. This initiates bipolar space-charge flow in the anode-cathode gap that severely perturbs the electron flow at the launch point. The result is significant microwave power reduction on a 600-ns time scale. The field-shaper cathode, used previously to extend the MILO RF pulse duration beyond 400 ns, is shown to have several deficiencies concerning anode plasma formation. We report on implementation of miniature Pierce focusing electrodes on each end of the MILO cathode as a way to control the, beam current density, and hence, to minimize, anode plasma.

引用

页码：992 / 997

页数：6

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