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

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 perpendic...

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Published inPlasma and Fusion Research Vol. 8; p. 2402108
Main Authors OSAKABE, Masaki, SHINOHARA, Kouji, YOSHIDA, Maiko, ITOH, Takafumi, IDA, Katsumi, YOSHINUMA, Mikirou, ITAMI, Kiyoshi
Format Journal Article
LanguageEnglish
Published The Japan Society of Plasma Science and Nuclear Fusion Research 2013
Subjects
fast-ion diagnostic
FIDA
JT-60SA
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Summary: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.
ISSN:1880-6821
1880-6821
DOI:10.1585/pfr.8.2402108