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A Plan for a Fast-Ion D-Alpha (FIDA) Measurement for JT-60SA

Masaki OSAKABE, Kouji SHINOHARA¹⁾, Maiko YOSHIDA¹⁾, Takafumi ITOH, Katsumi IDA, Mikirou YOSHINUMA and Kiyoshi ITAMI¹⁾

National Institute for Fusion Science, 322-6 Toki, Gifu 509-5292, Japan

1)

Japan Atomic Energy Agency, Naka, Ibaraki 311-0193, Japan

(Received 7 December 2012 / Accepted 23 April 2013 / Published 26 September 2013)

Abstract

A new fast-ion diagnostic based on the spectroscopy of the Doppler shifted Balmer-alpha line of Deuterium is considered for JT-60SA. Two sight lines, one tangential and the other perpendicular, are examined as candidates. It was found that the tangential one has better sensitivity than the perpendicular one. A trial of the FIDA measurement was performed on JT-60U. Signals due to the tangential-NB injection were obtained. It was found that about the one third of the signal would be due to the active FIDA signal, which was produced by fast-ions and a probe beam, while the remainder would be due to passive signal. The results indicate the FIDA measurement on JT-60SA would be possible with proper background measurements.

Copyright (c) 2013 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

fast-ion diagnostic, JT-60SA, FIDA

DOI: 10.1585/pfr.8.2402108

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References

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This paper may be cited as follows:

Masaki OSAKABE, Kouji SHINOHARA, Maiko YOSHIDA, Takafumi ITOH, Katsumi IDA, Mikirou YOSHINUMA and Kiyoshi ITAMI, Plasma Fusion Res. 8, 2402108 (2013).