Gi. Zaginaylov et al., MODELING OF PLASMA EFFECT ON THE DIFFRACTION RADIATION OF RELATIVISTIC BEAM MOVING OVER A GRATING OF FINITE EXTENT, Microwave and optical technology letters, 16(1), 1997, pp. 50-54
The rigorous numerical treatment of the relativistic beam radiation ov
er a finite-length grating both in the presence and without a backgrou
nd plasma is presented. The most attention is paid to the excitation n
ear the frequency of the pi-type resonance used in backward wave oscil
lators (BWO) and multiwave Cherenkov generators (MWCG). Based on the o
btained 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 phen
omenon and some other effects observed in BWO earlier is suggested. (C
) 1997 John Wiley & Sons, Inc.