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Title: 2D electron temperature diagnostic using soft x-ray imaging technique

Abstract

We have developed a two-dimensional (2D) electron temperature (T{sub e}) diagnostic system for thermal structure studies in a low-aspect-ratio reversed field pinch (RFP). The system consists of a soft x-ray (SXR) camera with two pin holes for two-kinds of absorber foils, combined with a high-speed camera. Two SXR images with almost the same viewing area are formed through different absorber foils on a single micro-channel plate (MCP). A 2D T{sub e} image can then be obtained by calculating the intensity ratio for each element of the images. We have succeeded in distinguishing T{sub e} image in quasi-single helicity (QSH) from that in multi-helicity (MH) RFP states, where the former is characterized by concentrated magnetic fluctuation spectrum and the latter, by broad spectrum of edge magnetic fluctuations.

Authors:
; ; ; ; ;  [1]; ;  [2]
  1. Department of Electronics, Kyoto Institute of Technology, Kyoto 606-8585 (Japan)
  2. National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292 (Japan)
Publication Date:
OSTI Identifier:
22254994
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 85; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ASPECT RATIO; CAMERAS; ELECTRON TEMPERATURE; FLUCTUATIONS; FOILS; HELICITY; IMAGES; MICROCHANNEL ELECTRON MULTIPLIERS; REVERSED-FIELD PINCH DEVICES; REVERSE-FIELD PINCH; SOFT X RADIATION

Citation Formats

Nishimura, K., E-mail: nishim11@nuclear.es.kit.ac.jp, Sanpei, A., E-mail: sanpei@kit.ac.jp, Tanaka, H., Ishii, G., Kodera, R., Ueba, R., Himura, H., Masamune, S., Ohdachi, S., and Mizuguchi, N. 2D electron temperature diagnostic using soft x-ray imaging technique. United States: N. p., 2014. Web. doi:10.1063/1.4867076.
Nishimura, K., E-mail: nishim11@nuclear.es.kit.ac.jp, Sanpei, A., E-mail: sanpei@kit.ac.jp, Tanaka, H., Ishii, G., Kodera, R., Ueba, R., Himura, H., Masamune, S., Ohdachi, S., & Mizuguchi, N. 2D electron temperature diagnostic using soft x-ray imaging technique. United States. https://doi.org/10.1063/1.4867076
Nishimura, K., E-mail: nishim11@nuclear.es.kit.ac.jp, Sanpei, A., E-mail: sanpei@kit.ac.jp, Tanaka, H., Ishii, G., Kodera, R., Ueba, R., Himura, H., Masamune, S., Ohdachi, S., and Mizuguchi, N. 2014. "2D electron temperature diagnostic using soft x-ray imaging technique". United States. https://doi.org/10.1063/1.4867076.
@article{osti_22254994,
title = {2D electron temperature diagnostic using soft x-ray imaging technique},
author = {Nishimura, K., E-mail: nishim11@nuclear.es.kit.ac.jp and Sanpei, A., E-mail: sanpei@kit.ac.jp and Tanaka, H. and Ishii, G. and Kodera, R. and Ueba, R. and Himura, H. and Masamune, S. and Ohdachi, S. and Mizuguchi, N.},
abstractNote = {We have developed a two-dimensional (2D) electron temperature (T{sub e}) diagnostic system for thermal structure studies in a low-aspect-ratio reversed field pinch (RFP). The system consists of a soft x-ray (SXR) camera with two pin holes for two-kinds of absorber foils, combined with a high-speed camera. Two SXR images with almost the same viewing area are formed through different absorber foils on a single micro-channel plate (MCP). A 2D T{sub e} image can then be obtained by calculating the intensity ratio for each element of the images. We have succeeded in distinguishing T{sub e} image in quasi-single helicity (QSH) from that in multi-helicity (MH) RFP states, where the former is characterized by concentrated magnetic fluctuation spectrum and the latter, by broad spectrum of edge magnetic fluctuations.},
doi = {10.1063/1.4867076},
url = {https://www.osti.gov/biblio/22254994}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 3,
volume = 85,
place = {United States},
year = {Sat Mar 15 00:00:00 EDT 2014},
month = {Sat Mar 15 00:00:00 EDT 2014}
}