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Retarding field energy analyzer for the Saskatchewan Torus–Modified plasma boundary

Rev. Sci. Instrum. 80, 103505 (2009); doi:10.1063/1.3247902

Published 22 October 2009

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M. Dreval, D. Rohraff, C. Xiao, and A. Hirose
Plasma Physics Laboratory, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada
The retarding field energy analyzer (RFA) is a simple and reliable diagnostic technique to measure the ion temperature in the scrape-off layer and edge of magnetic fusion devices. Design and operation features of a single-sided (facing the ion flow) RFA for ion temperature measurements in the Saskatchewan Torus–Modified (STOR-M) tokamak are described. Its compact size (21×15×20  mm3) allows RFA measurements without perturbing plasma significantly. Both ion and electron temperature have been measured by RFA in the STOR-M tokamak. A method is proposed to correct the effects of ion flow on the ion temperature using the simultaneously measured Mach number. The measured electron temperature is consistent with the previously reported Langmuir probe data. Abnormal behavior of the RFA has been observed in both ion and electron modes when RFA is inserted deep into the plasma. ©2009 American Institute of Physics
History: Received 12 May 2009; accepted 23 September 2009; published 22 October 2009
Permalink: http://link.aip.org/link/?RSINAK/80/103505/1
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KEYWORDS and PACS

Keywords
PACS
  • 52.70.-m
    Plasma diagnostic techniques and instrumentation
  • 52.55.Fa
    Tokamaks
  • YEAR: 2009

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ISSN:
0034-6748 (print)   1089-7623 (online)
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