Title :
Self-consistent simulation of cyclotron autoresonance maser amplifiers
Author :
Pendergast ; Danley, B.G. ; Temkin, Richard J. ; Wurtele, J.S.
Author_Institution :
Plasma Fusion Center, MIT, Cambridge, MA, USA
fDate :
4/1/1988 12:00:00 AM
Abstract :
A self-consistent, one-dimensional model of the cyclotron autoresonance maser (CARM) amplifier is developed, and numerical simulations based on this model are described. Detailed study results of the CARM gain and efficiency for a wide range of initial energy and velocity spreads are presented. The interaction efficiency is found to be substantially increased when the axial magnetic field is tapered. Efficiencies of greater than 41% are obtained for a 140-GHz CARM amplifier with a tapered axial magnetic field and a 700-kV 4.5-A electron beam with parallel velocity spreads of less than 1%. A discussion of the nonlinear bandwidth and interaction sensitivity to axial-field inhomogeneities is presented
Keywords :
masers; 140 GHz; 4.5 A; 700 kV; axial magnetic field inhomogeneities; cyclotron autoresonance maser amplifiers; efficiency; energy spread; gain; interaction sensitivity; nonlinear bandwidth; numerical simulations; self-consistent, one-dimensional model; velocity spread; Bandwidth; Cyclotrons; Electron beams; Frequency; Gyrotrons; Magnetic fields; Masers; Numerical simulation; Oscillators; Resonance;
Journal_Title :
Plasma Science, IEEE Transactions on
