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Time dependent multigroup analysis of nuclear elastic scattering effects in advanced fuel fusion plasmas

Y. Nakao, H. Hori, T. Hanada, K. Kudo, M. Ohta1988年被引用 26Nuclear FusionIF 3出版社

Effects of nuclear elastic scattering (NES) on the slowing down of charged fusion products in a typical deuterium plasma and the burn dynamics of ignited Cat-D and D-D-3He plasmas are investigated on the basis of a linear Boltzmann-Fokker-Planck equation. A multigroup method is used to obtain the distribution functions for the fusion products and their recoils. It is shown that an adequate treatment of the slowing-down process, especially the consideration of NES and of the slowing-down time delay, is essential for an accurate prediction of the dynamic behaviour and the thermal instability of plasmas. NES enhances the thermal instability and accelerates the temperature excursion from the equilibrium. The inclusion of NES results in a 20-30 keV increase in the critical temperature for thermal stability.

日本語訳

核弾性散乱(NES)が典型的な重水素プラズマ中の荷電核融合生成物の減速および着火したCat-DおよびD-D-³Heプラズマの燃焼ダイナミクスに及ぼす影響を、線形ボルツマン・フォッカー・プランク方程式に基づいて調査する。多群法を用いて、核融合生成物とその反跳粒子の分布関数を求める。減速過程の適切な取り扱い、特にNESと減速時間遅延の考慮が、プラズマの動的挙動と熱的不安定性の正確な予測に不可欠であることが示される。NESは熱的不安定性を増強し、平衡からの温度逸脱を加速する。NESを含めることにより、熱的安定性の臨界温度が20〜30 keV上昇する。

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