A metal-dielectric cathode

被引：20

作者：

Fan, Yu-Wei ^{[1
]}

Zhong, Hui-Huang ^{[1
]}

Li, Zhi-Qiang ^{[1
]}

Yang, Han-Wu ^{[1
]}

Shu, Ting ^{[1
]}

Zhou, Heng ^{[1
]}

Yuan, Cheng-Wei ^{[1
]}

Zhang, Jun ^{[1
]}

Luo, Ling ^{[1
]}

机构：

[1] Natl Univ Def Technol, Coll Optoelect Sci & Engn, Changsha 410073, Hunan, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 104卷 / 02期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2957054

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In order to improve the pulse repetition rate and the maintenance-free lifetime of an improved magnetically insulated transmission line oscillator (MILO) previously developed in our laboratory, a metal-dielectric cathode is investigated experimentally. It consists of three components: a stainless steel base, bronze foils, and double-sided printed boards. The experimental results show that the shot-to-shot reproducibility of the diode voltage and current is very good and the performances of the improved MILO are steady. In addition, no observable degradation could be detected in the emissive characteristic of the metal-dielectric cathode after 350 shots. The experimental results prove that the metal-dielectric cathode is a promising cathode for repetitively pulsed MILO operation. However, the leading edge of the radiated microwave pulse is gradually delayed during the repetition rate. A likely reason is that high pressure results in gas ionization in the beam-microwave interaction region, and plasma formation delays the time that the improved MILO achieves nonlinear steady state. (C) 2008 American Institute of Physics.

引用

页数：4

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