Field theory of a terahertz staggered double-grating arrays waveguide Cerenkov traveling wave amplifier

Journal Article · Tue Apr 15 00:00:00 EDT 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4870320· OSTI ID:22253343

Xie, Wenqiu; He, Fangming ^[1]; Wang, Zicheng; Luo, Jirun; Zhao, Ding; Liu, Qinglun ^[1]

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1. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190 (China)

Based on a rectilinear sheet electron beam propagating through the tunnel of a staggered double-grating arrays waveguide (SDGAW) slow-wave structure (SWS), a three dimensional field theory for describing the modes and the beam-wave interaction is presented, in which the higher order terms inside the grooves are retained. The fields' distribution and the conductivity losses are also calculated utilizing the theoretical model. With the optimized parameters of the SWS and the electron beam, a 1 THz SDGAW Cerenkov traveling wave amplifier may obtain a moderate net gain (the peak gain is 12.7 dB/cm) and an ultra 3 dB wideband (0.19 THz) considering the serious Ohmic losses. The theoretical results have been compared with those calculated by 3D HFSS code and CST STUDIO particle-in-cell simulations.

• OSTI ID: 22253343
• Journal Information: Physics of Plasmas, Vol. 21, Issue 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
ELECTRON BEAMS
FIELD THEORIES
GAIN
GRATINGS
SIMULATION
TRAVELLING WAVES
WAVEGUIDES