2014 Fiscal Year Final Research Report
Experimental evaluation of theoretically calculated ionization and recombination cross-sections of highly charged tungsten ions
Project/Area Number |
24760707
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Nuclear fusion studies
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Research Institution | Japan Atomic Energy Agency |
Principal Investigator |
NAKANO Tomohide 独立行政法人日本原子力研究開発機構, 核融合研究開発部門 那珂核融合研究所, 研究副主幹 (50354593)
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Project Period (FY) |
2012-04-01 – 2015-03-31
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Keywords | 核融合 / プラズマ / 原子物理 / 原子データ / 分光 / トカマク / 不純物 |
Outline of Final Research Achievements |
The purpose of this study is to calculate recombination and ionization cross-sections of W ions and to evaluate uncertainties of the cross-sections by means of experimental measurement. Although direct comparison of theoretical calculations to experimental measurements is difficult, we have developed a method which cancels out electron energy dependence of emission intensity and enables direct comparison of the experimentally measured intensity ratio of W44+ to W45+ emissions to the theoretically calculated ratio of W45+ recombination to W44+ ionization cross-section. The comparison shows that the calculation is in agreement with the measurement with a similar level of scatters to the experimental uncertainties. This indicates that the cross-sections with uncertainties, requested for tungsten density measurement in fusion plasmas for long, have been produced.
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Free Research Field |
プラズマ分光学
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