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Title: Development of fast steering mirror control system for plasma heating and diagnostics

A control system for a fast steering mirror has been newly developed for the electron cyclotron heating (ECH) launchers in the large helical device. This system enables two-dimensional scan during a plasma discharge and provides a simple feedback control function. A board mounted with a field programmable gate array chip has been designed to realize feedback control of the ECH beam position to maintain higher electron temperature by ECH. The heating position is determined by a plasma diagnostic signal related to the electron temperature such as electron cyclotron emission and Thomson scattering.
Authors:
; ; ; ; ; ; ; ; ; ;  [1] ;  [2]
  1. National Institute for Fusion Science, Toki, Gifu 509-5292 (Japan)
  2. Department of Advanced Energy, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8561 (Japan)
Publication Date:
OSTI Identifier:
22308660
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; 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; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BEAM POSITION; CONTROL SYSTEMS; ECR HEATING; ELECTRON CYCLOTRON-RESONANCE; ELECTRON TEMPERATURE; LHD DEVICE; MIRRORS; PLASMA; THOMSON SCATTERING