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Title: The next generation of electron cyclotron emission imaging diagnostics (invited)

A 128 channel two-dimensional electron cyclotron emission imaging system collects time-resolved 16x8 images of T{sub e} profiles and fluctuations on the TEXTOR tokamak. Electron cyclotron emission imaging (ECEI) is undergoing significant changes which promise to revolutionize and extend its capabilities far beyond what has been achieved to date. These include the development of a minilens array configuration with increased sensitivity antennas, a new local oscillator pumping scheme, enhanced electron cyclotron resonance heating shielding, and a highly flexible optical design with vertical zoom capability. Horizontal zoom and spot size (rf bandwidth) capabilities are also being developed with new ECEI electronics. An interface module is under development to remotely control all key features of the new ECEI instrument, many of which can be changed during a plasma discharge for maximum flexibility.
Authors:
; ; ; ; ; ;  [1] ;  [2] ; ; ; ;  [3]
  1. University of California at Davis, Davis, California 95616 (United States)
  2. Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784 (Korea, Republic of)
  3. FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, 3430 BE Niewuwegein (Netherlands)
Publication Date:
OSTI Identifier:
21266595
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 79; Journal Issue: 10; Conference: HTPD08: 17. topical conference on high-temperature plasma diagnostics, Albuquerque, NM (United States), 11-15 May 2008; Other Information: DOI: 10.1063/1.2967342; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANTENNAS; CYCLOTRON RESONANCE; CYCLOTRONS; DESIGN; ECR HEATING; ELECTRIC DISCHARGES; ELECTRONS; EMISSION; FLUCTUATIONS; IMAGES; OSCILLATORS; TEXTOR TOKAMAK; TIME RESOLUTION; TWO-DIMENSIONAL CALCULATIONS