A low-outgassing-rate carbon fiber array cathode

doi:10.1088/1674-1056/27/2/028401

中国物理B ›› 2018, Vol. 27 ›› Issue (2): 28401-028401.doi: 10.1088/1674-1056/27/2/028401

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

A low-outgassing-rate carbon fiber array cathode

An-Kun Li(李安昆), Yu-Wei Fan(樊玉伟), Bao-Liang Qian(钱宝良), Zi-Cheng Zhang(张自成), Tao Xun(荀涛)

College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073, China

收稿日期:2017-08-04 修回日期:2017-11-09 出版日期:2018-02-05 发布日期:2018-02-05
通讯作者: Yu-Wei Fan E-mail:fyw9108212@126.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 61671457).

A low-outgassing-rate carbon fiber array cathode

An-Kun Li(李安昆), Yu-Wei Fan(樊玉伟), Bao-Liang Qian(钱宝良), Zi-Cheng Zhang(张自成), Tao Xun(荀涛)

College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073, China

Received:2017-08-04 Revised:2017-11-09 Online:2018-02-05 Published:2018-02-05
Contact: Yu-Wei Fan E-mail:fyw9108212@126.com
About author:84.90.+a; 84.40.Fe
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 61671457).

摘要/Abstract

摘要： In this paper, a new carbon fiber based cathode-a low-outgassing-rate carbon fiber array cathode-is investigated experimentally, and the experimental results are compared with those of a polymer velvet cathode. The carbon fiber array cathode is constructed by inserting bunches of carbon fibers into the cylindrical surface of the cathode. In experiment, the diode base pressure is maintained at 1×10^-2 Pa-2×10^-2 Pa, and the diode is driven by a compact pulsed power system which can provide a diode voltage of about 100 kV and pulse duration of about 30 ns at a repetition rate of tens of Hz. Real-time pressure data are measured by a magnetron gauge. Under the similar conditions, the experimental results show that the outgassing rate of the carbon fiber array cathode is an order smaller than that of the velvet cathode and that this carbon fiber array cathode has better shot-to-shot stability than the velvet cathode. Hence, this carbon fiber array cathode is demonstrated to be a promising cathode for the radial diode, which can be used in magnetically insulated transmission line oscillator (MILO) and relativistic magnetron (RM).

关键词: high power microwave, magnetically insulated transmission line oscillator, carbon fiber array cathode, low outgassing rate

Abstract: In this paper, a new carbon fiber based cathode-a low-outgassing-rate carbon fiber array cathode-is investigated experimentally, and the experimental results are compared with those of a polymer velvet cathode. The carbon fiber array cathode is constructed by inserting bunches of carbon fibers into the cylindrical surface of the cathode. In experiment, the diode base pressure is maintained at 1×10^-2 Pa-2×10^-2 Pa, and the diode is driven by a compact pulsed power system which can provide a diode voltage of about 100 kV and pulse duration of about 30 ns at a repetition rate of tens of Hz. Real-time pressure data are measured by a magnetron gauge. Under the similar conditions, the experimental results show that the outgassing rate of the carbon fiber array cathode is an order smaller than that of the velvet cathode and that this carbon fiber array cathode has better shot-to-shot stability than the velvet cathode. Hence, this carbon fiber array cathode is demonstrated to be a promising cathode for the radial diode, which can be used in magnetically insulated transmission line oscillator (MILO) and relativistic magnetron (RM).

Key words: high power microwave, magnetically insulated transmission line oscillator, carbon fiber array cathode, low outgassing rate

中图分类号: (Other topics in electronics, radiowave and microwave technology, and direct energy conversion and storage)

84.90.+a

84.40.Fe (Microwave tubes (e.g., klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.))

李安昆, 樊玉伟, 钱宝良, 张自成, 荀涛. A low-outgassing-rate carbon fiber array cathode[J]. 中国物理B, 2018, 27(2): 28401-028401.

An-Kun Li(李安昆), Yu-Wei Fan(樊玉伟), Bao-Liang Qian(钱宝良), Zi-Cheng Zhang(张自成), Tao Xun(荀涛). A low-outgassing-rate carbon fiber array cathode[J]. Chin. Phys. B, 2018, 27(2): 28401-028401.

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A low-outgassing-rate carbon fiber array cathode

A low-outgassing-rate carbon fiber array cathode

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