| Project/Area Number |
01580007
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
プラズマ理工学
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
KATO Takako National Institute for Fusion Science, Associate professor, 助教授 (20115546)
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| Co-Investigator(Kenkyū-buntansha) |
FUJIMOTO Takashi Kyoto University, Fac. of Eng., Professor, 工学部, 教授 (90026203)
MASAI Kuniaki National Institute for Fusion Science, Assistant, 助手 (80181626)
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| Project Period (FY) |
1989 – 1991
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| Project Status |
Completed (Fiscal Year 1991)
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| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1991: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1990: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1989: ¥800,000 (Direct Cost: ¥800,000)
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| Keywords | hot plasma / spectroscopy / plasma diagnostic / atomic process / data evaluation / 炭素,酸素イオン / デ-タ評価 / He様イオン |
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| Research Abstract |
1. Spectral analysis of time dependent X-ray spectra of H and He like ions.
We have made a time dependent non-equilibrium ionization model which explain the time behaviour of the spectra as well as the ion ratios which are derived from the X-ray spectra obtained from tokamak and solar flares. We have found a contribution of the suprathemal electrons at the beginning of the plasma. The highly ionized ions produced by suprathermal electrons emit the recombination lines in the thermal plasma.
2. Line intensities of carbon and oxygen ions in the periphery plasma and their ionization rate.
We have constructed a collisional radiative model for all the atoms and ions of carbon and oxygen including n = 2 and 3 levels. This model includes the ionization and recombination processes among excited states such as inner-shell ionization. We have also calculated the visible line intensities (n = 3 - 4) including all the levels up to n = 4. The effective ionization rate coefficients on the electron density were also investigated.
3. Atomic processes for the neutral beam injection.
The spectral lines are emitted through charge exchange process between neutral beam and the impurity ions in the plasma. We have investigated the density effect on the spectral line intensities from H-like carbon ions. The effective ionization rate coefficients for He beam were also studied.
4. Atomic data compilation and assessment
1) Excitation process for He atom and He-like ions
2) Excitation process for He neutral beam injection
3) Excitation process for N atom and N-like ions
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