Common-frequency mode suppressing of overmoded relativistic backward wave oscillator with wide-gap reflector

Xiaowei, 张晓微 Zhang; Yongdong, 李永东 Li; Xianchen, 白现臣 Bai; Yuqin, 梁玉钦 Liang

doi:10.3788/hplpb20152707.73003

强激光与粒子束

2015

DOI: 10.3788/hplpb20152707.73003

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Common-frequency mode suppressing of overmoded relativistic backward wave oscillator with wide-gap reflector

张晓微 Zhang Xiaowei¹,

李永东 Li Yongdong²,

白现臣 Bai Xianchen³

et al.

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Direct excitation of TE11 mode in a relativistic backward wave oscillator

Xiao

Zhang

et al. 2016

Physics of Plasmas

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A relativistic backward wave oscillator for directly generating TE11 mode is proposed. An axially asymmetric slow wave structure and a sectioned annular cathode are introduced to suppress the TM01 mode and excite the TE11 mode. A pre-modulation dual-cavity, which allows part of the backward power to propagate into the diode region, is adopted to optimize the electron beam bunch, indicating that the conventional design principle that the diode region and the beam-wave interaction region should be isolated can be broken to increase the interaction efficiency. Particle-in-cell simulations show that when the diode voltage is 780 kV, and beam current is 6.1 kA, a microwave with power of 2.0 GW, and frequency of 9.25 GHz can be obtained, corresponding to an efficiency of 42%. Furthermore, the main output mode is TE11 mode, and the power of the cross-polarized mode is less than 10% within the calculation time of 50 ns.

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Direct excitation of TE11 mode in a relativistic backward wave oscillator

Xiao

Zhang

et al. 2016

Physics of Plasmas

View full text Add to dashboard Cite

show abstract

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Common-frequency mode suppressing of overmoded relativistic backward wave oscillator with wide-gap reflector

Cited by 1 publication

References 0 publications

Direct excitation of TE11 mode in a relativistic backward wave oscillator

Direct excitation of TE11 mode in a relativistic backward wave oscillator

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