| Budget Amount *help |
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| 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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