Characterization of Cesium Iodide-Coated Carbon-Fiber Aluminum Cathode for an S-Band High-Efficiency Vircator

被引：7

作者：

Ju, Jinchuan ^{[1
]}

Cai, Dan ^{[1
]}

Du, Guangxing ^{[1
]}

Wang, Yuwei ^{[1
]}

Liu, Lie ^{[1
]}

Zhang, Jiande ^{[1
]}

机构：

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

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2015年 / 43卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Carbon fiber; high-power microwave (HPM); plasma expansion; vircator; virtual cathode oscillator (VCO); TRIODE VIRTUAL CATHODE; OSCILLATOR; EMISSION; ENHANCEMENT; ANODE;

D O I：

10.1109/TPS.2015.2404135

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：

Carbon-fiber-aluminum (CFA) cathode is characterized to generate high-power microwave (HPM) from a high-efficiency three-cavity virtual-cathode oscillator (vircator). Plasma expansion velocity associated with the cesium iodide (CsI)-coated CFA cathode is determined in the experiment. It is found that the stationary plasma expansion velocity is diminished by CsI-coating to about 3 cm/mu s when driving by a 300-kV electrical pulse. Particle-in-cell (PIC) simulations indicate that the proposed vircator is capable of generating 550-MW S-band HPM at a central frequency of 2.1 GHz, when the diode voltage and current are 420 kV and 9.2 kA, respectively. The corresponding power conversion efficiency is as high as 14%. The generated HPM is with the TE10 mode of rectangular waveguide, which can give rise to an on-axis radiation pattern without requiring mode converter.

引用

页码：3522 / 3526

页数：5

共 22 条

[1] Survey of pulse shortening in high-power microwave sources [J].

Benford, J ;

Benford, G .

IEEE TRANSACTIONS ON PLASMA SCIENCE, 1997, 25 (02) :311-317

[2]

Benford J., 2007, High Power Microwaves

[3] Cathode and anode optimization in a virtual cathode oscillator [J].

Chen, Y. ;

Mankowski, J. ;

Walter, J. ;

Kristiansen, M. .

IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2007, 14 (04) :1037-1044

[4]

Du Guang-xing, 2006, High Power Laser and Particle Beams, V18, P253

[5] Experimental studies of anode and cathode materials in a repetitive driven axial vircator [J].

Elfsberg, Mattias ;

Hurtig, Tomas ;

Larsson, Anders ;

Moller, Cecilia ;

Nyholm, Sten E. .

IEEE TRANSACTIONS ON PLASMA SCIENCE, 2008, 36 (03) :688-693

[6] A diode design study of the virtual cathode oscillator with a ring-type reflector [J].

Jeon, W ;

Sung, KY ;

Lim, LE ;

Song, KB ;

Seo, Y ;

Choi, EH .

IEEE TRANSACTIONS ON PLASMA SCIENCE, 2005, 33 (06) :2011-2016

[7] Experimental and simulation studies of new configuration of virtual cathode oscillator [J].

Jiang, WH ;

Shimada, N ;

Prasad, SD ;

Yatsui, K .

IEEE TRANSACTIONS ON PLASMA SCIENCE, 2004, 32 (01) :54-59

[8] Efficiency enhancement of a coaxial virtual cathode oscillator [J].

Jiang, WH ;

Dickens, J ;

Kristiansen, M .

IEEE TRANSACTIONS ON PLASMA SCIENCE, 1999, 27 (05) :1543-1544

[9] Characterization of plasma expansion dynamics in a high power diode with a carbon-fiber-aluminum cathode [J].

Ju, J. -C. ;

Liu, L. ;

Cai, D. .

APPLIED PHYSICS LETTERS, 2014, 104 (23)

[10] Simple theory for the two-dimensional Child-Langmuir law [J].

Lau, YY .

PHYSICAL REVIEW LETTERS, 2001, 87 (27) :278301-278301

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