PREDICTED OPERATING-CONDITIONS FOR MAINTAINING MODE PURITY IN THE 1-MW 200-GHZ FOM FREE-ELECTRON MASER

Authors
CAPLAN M ANTONSEN T LEVUSH B TULUPOV A URBANUS W
Citation
M. Caplan et al., PREDICTED OPERATING-CONDITIONS FOR MAINTAINING MODE PURITY IN THE 1-MW 200-GHZ FOM FREE-ELECTRON MASER, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 358(1-3), 1995, pp. 174-177
Citations number
3
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
358
Issue
1-3
Year of publication
1995
Pages
174 - 177
Database
ISI
SICI code
0168-9002(1995)358:1-3<174:POFMMP>2.0.ZU;2-N
Abstract
A Free Electron Maser (FEM) oscillator is now under construction at th e FOM Institute (Rijnhuizen), Netherlands with the goal of producing 1 MW long pulse to CW microwave output in the range 130 GHz to 250 GHz with application to plasma heating. A newly developed multi-frequency FEM simulation code (MALT1D) using the windows approximation in the hi gh gain regime and including AC space charge is used to model possibil ities for longitudinal mode competition and resulting non-stationary c haotic output. The code predicts that stationary single frequency outp ut can be obtained by taking advantage of the frequency dependence of the feedback reflection coefficient and by optimizing the gap spacing between the two wiggler sections.