Theoretical study of klystron-like relativistic backward wave oscillator

Xiao Renzhen; Teng Yan; Song Zhimin; Chen Changhua; Sun Jun

doi:10.3788/HPLPB20122403.0747

Volume 24 Issue 03

Jun. 2016

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Article Navigation > High Power Laser and Particle Beams > 2012 > 24(03): 747-751

Wang Li, Cao Jianshe, Zhao Zheng. Beam profile measurement of accelerator storage ring with synchrotron light imaging[J]. High Power Laser and Particle Beams, 2012, 24: 2430-2434. doi: 10.3788/HPLPB20122410.2430

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Xiao Renzhen, Teng Yan, Song Zhimin, et al. Theoretical study of klystron-like relativistic backward wave oscillator[J]. High Power Laser and Particle Beams, 2012, 24: 747-751. doi: 10.3788/HPLPB20122403.0747

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Theoretical study of klystron-like relativistic backward wave oscillator

doi: 10.3788/HPLPB20122403.0747

1.
Northwest Institute of Nuclear Technology,P.O.Box 69-13,Xi’an 710024,China

Received Date: 2011-10-24
Rev Recd Date: 2011-08-31
Publish Date: 2012-03-05

Abstract

Abstract

The dispersion characteristics of slow wave structure(SWS) and the beam-wave interaction theory are developed for klystron-like relativistic backward wave oscillator. The dispersion characteristics show that the operation mode of the device is TM01 mode, near point, and the maximum growth rate is relatively small, which is partly due to the larger span between the electron beam and SWS and will result in a larger saturation time. The frequency predicated by the dispersion characteristics is very close to that obtained in previous particle-in-cell simulation. In the beam-wave interaction theory, the 0th space harmonic of forward wave, the -1st space harmonic of backward wave, and the 1st-order beam space-charge wave are taken into account. The resonant reflector provides pre-modulation for beam current and electron energy, and the modulation cavity and extraction cavity introduce larger changes in coupling impedance and phase velocity. Both steady state and unsteady state calculations show that beam-wave conversion efficiency of above 40% can be obtained.
- high power microwave,
- relativistic backward wave oscillator,
- cerenkov radiation,
- transition radiation,
- beam-wave interaction

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