| 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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| 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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