Development of Negative-Hydrogen-Ion Temperature Measurement with Optical Cavity

2014 Fiscal Year Final Research Report

• Project/Area Number: 25800307
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Plasma science
• Research Institution: National Institute for Fusion Science
• Principal Investigator: NAKANO Haruhisa 核融合科学研究所, ヘリカル研究部, 助教 (90442524)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 水素負イオン温度 / 水素負イオン密度 / Cavity Ringdown Method / レーザー計測 / イオン源 / 中性粒子ビーム / 光脱離反応

Outline of Final Research Achievements

Negative hydrogen ion has one more electron than hydrogen atom. Neutral beam injector which is one of the powerful heating devices for fusion reactor include a negative hydrogen ion source which generates negative hydrogen ion beam. To enhance the NBI performance, one of the important parts is improvement of the negative hydrogen ion source performance. Basic study contributed to it needs many physical values including negative hydrogen ion temperature. In this research, diagnostics of the negative hydrogen ion temperature by using an optical cavity was successfully developed by applying an existing negative hydrogen ion density measurement. As a result, a developed instrument can measure negative hydrogen ion density and temperature, simultaneously.

Free Research Field

プラズマ計測