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Modeling of plasma effect on the diffraction radiation of relativistic beam moving over a grating of finite extent
Author(s) -
Zaginaylov Gennadiy I.,
Gandel Yuri V.,
Turbin Petr V.
Publication year - 1997
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(199709)16:1<50::aid-mop16>3.0.co;2-8
Subject(s) - cherenkov radiation , grating , physics , microwave , optics , radiation , plasma , diffraction , beam (structure) , excitation , backward wave oscillator , resonance (particle physics) , relativistic electron beam , diffraction grating , computational physics , atomic physics , cathode ray , nuclear physics , electron , detector , quantum mechanics
Abstract The rigorous numerical treatment of the relativistic beam radiation over a finite‐length grating both in the presence and without a background plasma is presented. The most attention is paid to the excitation near the frequency of the π‐type resonance used in backward wave oscillators (BWO) and multiwave Cherenkov generators (MWCG). Based on the obtained results, the simultaneous influence of plasma filling and mode conversion at the grating end on radiation efficiency is discussed. A new, more accurate treatment of the generation frequency‐locking phenomenon and some other effects observed in BWO earlier is suggested. © 1997 John Wiley & Sons, Inc. Microwave Opt Technol Lett 16: 50–54, 1997.