针对锁相的相对论返波管优化设计
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摘要
为实现基于相对论返波管振荡器的高功率微波相干合成,开展了针对锁相的低磁场返波管优化设计。通过优化中间调制腔的位置,降低工作模式的Q值,达到降低种子微波功率的目的。以外注入微波锁相方式为例,优化后的器件锁定增益大于20 dB,20 MW的注入微波功率即可实现对GW级的微波输出的相位控制。研究结果对调制电子束锁相也具有参考价值。
For the purpose of coherent high power microwave combining based on Relativistic Backward Wave Oscillator(RBWO),an optimal design of a low magnetic field RBWO is present. In order to decrease the requirement on the seed RF power for phase locking, the axial position of the intermediate bunch cavity of the RBWO is optimized to decrease the Q-value of the working mode. Particle In Cell(PIC)simulation shows that an input power of 20 MW is sufficient to lock the frequency and phase of the output.And the corresponding gain is higher than 20 dB. The result is also valuable for phase locking by modulated electron beams.
For the purpose of coherent high power microwave combining based on Relativistic Backward Wave Oscillator(RBWO),an optimal design of a low magnetic field RBWO is present. In order to decrease the requirement on the seed RF power for phase locking, the axial position of the intermediate bunch cavity of the RBWO is optimized to decrease the Q-value of the working mode. Particle In Cell(PIC)simulation shows that an input power of 20 MW is sufficient to lock the frequency and phase of the output.And the corresponding gain is higher than 20 dB. The result is also valuable for phase locking by modulated electron beams.
引文
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[9]袁欢,刘振邦,黄华,等.强流脉冲驱动的X波段多注相对论速调管相位特性[J].强激光与粒子束, 2017,29(9):093005.(YUAN Huan,LIU Zhengbang,HUANG Hua,et al. Phase characteristics of X-band multiple beams relativistic klystron driven by intense pulse electron beams[J]. High Power Laser and Particle Beams, 2017,29(9):093005.)
[10]BUGAEV S P,CHEREPENIN V A,KANAVETS V I. Relativistic multiwave Cherenkov generators[J]. IEEE Transactions Plasma Science, 1990,18(3):525-536.
[11]ZHANG J,JIN Z X,YANG J H,et al. Successful suppression of pulse shortening in an X-band overmoded relativistic backward-wave oscillator with pure TM01 mode output[J]. IEEE Transactions Plasma Science, 2015,43(2):528.
[12]MCCURDY A H,ARMSTRONG C M,BOLLEN W M,et al. Mode selection by application of an external signal in an overmoded gyrotron oscillator[J]. Physical Review Letters, 1988,61(20):2316-2319.
[13]TENG Y,SONG W,SUN J,et al. Phase locking of high power relativistic backward wave oscillator using priming effect[J].Journal of Applied Physics, 2012,111(4):043303.
[14]SONG W,SUN J,SHAO H,et al. Inducing phase locking of multiple oscillators beyond the Adler’s condition[J]. Journal of Applied Physics, 2012,111(2):023302.
[15]WOO W,BENFORD J,FITTINGHOFF D,et al. Phase locking of high-power microwave oscillators[J]. Journal of Applied Physics,1989,65(2):861-866.
[2]FRIEDMAN M,KRALL J,LAU Y Y,et al. Efficient generation of multi-gigawatt RF power by a RKA[J]. Review of Scientific Instruments, 1990,61(1):171-174.
[3]HUANG H,FENG D C,LUO Guangyao,et al. Repetitive operation of an S-Band,1 GW relativistic klystron amplifier[J].IEEE Transactions Plasma Science, 2007,35(2):384-387.
[4]XIAO R Z,CHEN C H,ZHANG X W,et al. Efficiency enhancement of a high power microwave generator based on a relativistic backward wave oscillator with a resonant reflector[J]. Journal of Applied Physics, 2009,105(5):053306.
[5]GE X J,ZHONG H H,QIAN B L,et al. Asymmetric-mode competition in a relativistic backward wave oscillator with a coaxial slow-wave structure[J]. Applied Physics Letters, 2010,97(24):241501.
[6]XIAO R Z,CHEN C H,SONG W,et al. RF phase control in a high-power high-efficiency klystron-like relativistic backward wave oscillator[J]. Journal of Applied Physics, 2011,110(1):013301.
[7]邵剑波,谢鸿全,李正红,等. Ku波段低磁场返波管振荡器的模拟与实验[J].太赫兹科学与电子信息学报, 2015,13(1):80-85.(SHAO Jianbo,XIE Hongquan,LI Zhenghong,et al. Simulation and experiment of Ku-band backward wave oscillator with low magnetic field[J]. Journal of Terahertz Science and Electronic Information Technology, 2015,13(1):80-85.)
[8]陈永东,谢鸿全,李正红,等.电子回流对相对论速调管稳定工作的影响[J].强激光与粒子束, 2013,25(7):1770-1773.(CHEN Yongdong,XIE Hongquan,LI Zhenghong,et al. Effect of returning electrons on stability of relativistic klystron amplifier[J]. High Power Laser and Particle Beams, 2013,25(7):1770-1773.)
[9]袁欢,刘振邦,黄华,等.强流脉冲驱动的X波段多注相对论速调管相位特性[J].强激光与粒子束, 2017,29(9):093005.(YUAN Huan,LIU Zhengbang,HUANG Hua,et al. Phase characteristics of X-band multiple beams relativistic klystron driven by intense pulse electron beams[J]. High Power Laser and Particle Beams, 2017,29(9):093005.)
[10]BUGAEV S P,CHEREPENIN V A,KANAVETS V I. Relativistic multiwave Cherenkov generators[J]. IEEE Transactions Plasma Science, 1990,18(3):525-536.
[11]ZHANG J,JIN Z X,YANG J H,et al. Successful suppression of pulse shortening in an X-band overmoded relativistic backward-wave oscillator with pure TM01 mode output[J]. IEEE Transactions Plasma Science, 2015,43(2):528.
[12]MCCURDY A H,ARMSTRONG C M,BOLLEN W M,et al. Mode selection by application of an external signal in an overmoded gyrotron oscillator[J]. Physical Review Letters, 1988,61(20):2316-2319.
[13]TENG Y,SONG W,SUN J,et al. Phase locking of high power relativistic backward wave oscillator using priming effect[J].Journal of Applied Physics, 2012,111(4):043303.
[14]SONG W,SUN J,SHAO H,et al. Inducing phase locking of multiple oscillators beyond the Adler’s condition[J]. Journal of Applied Physics, 2012,111(2):023302.
[15]WOO W,BENFORD J,FITTINGHOFF D,et al. Phase locking of high-power microwave oscillators[J]. Journal of Applied Physics,1989,65(2):861-866.