3-D simulation of S-band wide-gap klystron amplifier output cavity

被引：0
|
作者：
Bai X. [1 ]
Zhang J. [1 ]
Yang J. [1 ]
机构：
[1] College of Opto-Electronic Science and Engineering, National University of Defense Technology
来源：
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2010年 / 22卷 / 12期
关键词：
Output cavity; PIC simulation; S-band; Washer loaded; Wide-gap klystron;
D O I：
10.3788/HPLPB20102212.2930
中图分类号：
学科分类号：
摘要：
High frequency characteristics analysis is presented on a washer loaded wide-gap reentrant output cavity for the S-band relativistic wide-gap klystron amplifier(WKA). At resonant frequency points, the electric field modes of the wide-gap output cavity with large coupling hole are not TM011 anymore. To avoid these unwanted modes and their influences on cavity gap field distribution, a large enough distance between designed working frequency and resonant frequency is required. At the same time, an effort to reduce the output cavity external quality factor is also necessary. The output cavity power extraction effect was simulated by using a three-dimension fully electromagnetic particle-in-cell(PIC) code. At beam voltage of 600 kV, cathode current of 5 kA and current modulation depth of 94%, the average output power of an optimized washer loaded wide-gap reentrant cavity is 1.07 GW at 3.6 GHz, with an average power efficiency of about 35.7%.
引用
收藏
页码：2930 / 2934
页数：4
相关论文
共 15 条
  • [1] Carlsten B.E., Faehl R.J., Fazio M.V., Et al., Beam-cavity interaction physics for mildly relativistic, intense-beam klystron amplifier, IEEE Trans on Plasma Sci, 18, 5, pp. 730-738, (1994)
  • [2] Lau Y.Y., Friedman M., Krall J., Et al., Relativistic klystron amplifier driven by modulated intense relativistic electron beams, IEEE Trans on Plasma Sci, 18, 3, pp. 553-569, (1990)
  • [3] Wilsen C.B., Luginsland J.W., Lau Y.Y., Et al., A simulation study of beam loading on a cavity, IEEE Trans on Plasma Sci, 30, 3, pp. 1160-1168, (2002)
  • [4] Huang H., Meng F., Fan Z., Et al., 3-D analysis on the coaxial output cavity with large coupling hole, High Power Laser and Particle Beams, 16, 12, pp. 1571-1575, (2004)
  • [5] Lei L., Fan Z., Huang H., Et al., Numerical simulation of coaxial output cavity of S-band relativistic klystron amplifier, High Power Laser and Particle Beams, 18, 10, pp. 1677-1681, (2006)
  • [6] Lei L., Fan Z., Huang H., Et al., Particle simulation of relativistic klystron amplifier double-gap output cavity, High Power Laser and Particle Beams, 19, 8, pp. 1338-1342, (2007)
  • [7] Lei L., Fan Z., Huang H., Et al., Design and investigation of S-band klystron double-gap output cavity, High Power Laser and Particle Beams, 20, 1, pp. 103-107, (2008)
  • [8] Lei L., Fan Z., Huang H., Et al., Three dimensional analysis and simulation of input cavity for S-band relativistic klystron amplifier, High Power Laser and Particle Beams, 20, 3, pp. 455-459, (2008)
  • [9] Lei L., Fan Z., Huang H., Et al., High frequency characteristics analysis and experimental study on open input cavity for klystron, High Power Laser and Particle Beams, 21, 4, pp. 511-515, (2009)
  • [10] Lei L., Huang H., Fan Z., Et al., Three-dimensional whole-tube simulation of C-band relativistic klystron amplifier, High Power Laser and Particle Beams, 21, 6, pp. 879-882, (2009)
12