RF Breakdown of the Resonant Reflector in a Relativistic Backward Wave Oscillator

被引：31
作者：
Cao, Yibing [1 ]
Sun, Jun [1 ]
Zhang, Yuchuan [1 ]
Song, Zhimin [1 ]
Wu, Ping [1 ,2 ]
Fan, Zhiqiang [1 ,2 ]
Teng, Yan [1 ]
He, Te [1 ]
Chen, Changhua [1 ]
机构：
[1] Northwest Inst Nucl Technol, Sci & Technol High Power Microwave Lab, Xian 710024, Shaanxi, Peoples R China
[2] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China
来源：
IEEE TRANSACTIONS ON PLASMA SCIENCE | 2018年 / 46卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Anodic mechanism; high-power microwave (HPM); pulse shortening; radio frequency (RF) breakdown; EXPLOSIVE ELECTRON-EMISSION; FIELD-EMISSION; VACUUM BREAKDOWN; CATHODE; CAVITIES; ENHANCEMENT; MULTIPACTOR; OPERATION; DISCHARGE; MODEL;
D O I：
10.1109/TPS.2018.2810209
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：
Radio frequency (RF) breakdown can result in pulse shortening and severely limits the performance of high-power microwave (HPM) generators. In this paper, the initial stage of RF breakdown in HPM generators with a strong external guiding magnetic field has been carefully analyzed. It is thought that the initial breakdown process involves electron emission induced by an intense local field, electron acceleration in the electric field, and electron bombardment on the structure's surfaces. Strong external guiding magnetic fields play a key role in the RF breakdown process of HPM generators. They concentrate the impact energy and make it more destructive. To suppress RF breakdown, feasible solutions include lowering the local field strength, decreasing the energy of the field-emitted electrons obtained from the RF field, reducing the deposited energy density, and improving the material's resistance to electron bombardment.
引用
收藏
页码：900 / 908
页数：9
相关论文
共 45 条
[31]   ONSET OF BREAKDOWN AND FORMATION OF CATHODE SPOTS [J].
SCHWIRZKE, F ;
HALLAL, MP ;
MARUYAMA, XK .
IEEE TRANSACTIONS ON PLASMA SCIENCE, 1993, 21 (05) :410-415
[32]   VACUUM BREAKDOWN ON METAL-SURFACES [J].
SCHWIRZKE, FR .
IEEE TRANSACTIONS ON PLASMA SCIENCE, 1991, 19 (05) :690-696
[33]   Reduction of the Multipactor Threshold Due to Electron Cyclotron Resonance [J].
Semenov, V. E. ;
Zharova, N. A. ;
Zaitsev, N. I. ;
Gvozdev, A. K. ;
Sorokin, A. A. ;
Lisak, M. ;
Rasch, J. ;
Puech, J. .
IEEE TRANSACTIONS ON PLASMA SCIENCE, 2012, 40 (11) :3062-3069
[34]   Importance of Reflection of Low-Energy Electrons on Multipactor Susceptibility Diagrams for Narrow Gaps [J].
Semenov, Vladimir E. ;
Rakova, E. I. ;
Anderson, Dan ;
Lisak, Mietek ;
Puech, Jerome .
IEEE TRANSACTIONS ON PLASMA SCIENCE, 2009, 37 (09) :1774-1781
[35]   Investigation of an improved relativistic backward wave oscillator in efficiency and power capacity [J].
Song, W. ;
Chen, C. H. ;
Sun, J. ;
Zhang, X. W. ;
Shao, H. ;
Song, Z. M. ;
Huo, S. F. ;
Shi, Y. C. ;
Li, X. Z. .
PHYSICS OF PLASMAS, 2012, 19 (10)
[36]   Suppressing RF breakdown of powerful backward wave oscillator by field redistribution [J].
Song, W. ;
Sun, J. ;
Song, Z. M. ;
Chen, C. H. ;
Shao, H. ;
Zhang, Y. C. .
AIP ADVANCES, 2012, 2 (01)
[37]   PHYSICAL-PROPERTIES OF THIN-FILM FIELD-EMISSION CATHODES WITH MOLYBDENUM CONES [J].
SPINDT, CA ;
BRODIE, I ;
HUMPHREY, L ;
WESTERBERG, ER .
JOURNAL OF APPLIED PHYSICS, 1976, 47 (12) :5248-5263
[38]   Numerical modeling of thermal response of thermofield electron emission leading to explosive electron emission [J].
Sun, J ;
Liu, GZ .
IEEE TRANSACTIONS ON PLASMA SCIENCE, 2005, 33 (05) :1487-1490
[39]   Gas cluster ion beam surface treatments for reducing field emission and breakdown of electrodes and SRF cavities [J].
Swenson, D. R. ;
Wu, A. T. ;
Degenkolb, E. ;
Insepov, Z. .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2007, 261 (1-2) :630-633
[40]   Design and efficient operation of a coaxial RBWO [J].
Teng, Y. ;
Chen, C. H. ;
Shao, H. ;
Sun, J. ;
Song, Z. M. ;
Xiao, R. Z. ;
Du, Z. Y. .
LASER AND PARTICLE BEAMS, 2013, 31 (02) :321-331
12345