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Title: Analysis of oscillation characteristics and optimal conditions for high power operation of Gyrotron FU CW GIII

The oscillation characteristics of Gyrotron FU CW GIII and its wave frequency and output power dependences on the magnetic field strength, the gun coil current, and the anode voltage were investigated experimentally. The experimental results were analyzed theoretically using a self-consistent code that included the electron properties in the cavity, corresponding to the actual operating conditions in the experiments. As a result, it was found that the variation in frequency with the magnetic field strength was related to an axial profile change in the electromagnetic wave in the cavity. In addition, the optimal condition that gives the maximum output power was found to be determined by the pitch factor rather than by the electron beam radius under the given operating conditions.
Authors:
; ; ; ; ; ;  [1]
  1. Research Center for Development of Far-Infrared Region, University of Fukui, Fukui 910-8507 (Japan)
Publication Date:
OSTI Identifier:
22303597
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANODES; ELECTROMAGNETIC RADIATION; ELECTRON BEAMS; ELECTRONS; MAGNETIC FIELDS; OSCILLATIONS