Measurement of ion temperature spatial structure in high temperature plasmas based on Balmer-alpha spectrum
| Project/Area Number |
26610191
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Plasma science
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| Research Institution | Kyoto University |
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Principal Investigator |
Fujii Keisuke 京都大学, 工学研究科, 助教 (10637705)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | プラズマ分光 / 高ダイナミックレンジ分光 / 中性粒子 / イオン流速 / 高ダイナミックレンジ分光計測 |
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| Outline of Final Research Achievements |
We have developed a spectroscopic system that can measure hydrogen Balmer-\alpha spectrum with high-dynamic-range, high-temporal-resolution and multiple line-of-sights. In particular, we adopted a 64-ch photomultipler tube as a photo detecotr. We combined it with multi-channel current amplifiers and multi-channel analog-digital converters, as well as high-throughput spectrometer that compensates exposure time by high-temporal measurement.
We applied this system to Large Helical Device plasma in National Institute for Fusion Science, Toki, Japan. We detected a fluctuation of the spectral shape, which is possibly caused by temporal variation of electron density or ion temperature.
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Report
(4 results)
Research Products
(3 results)
