2. D-^3He核融合反応の物理的特性(<小特集> D-^3He核融合とその開発課題)

概要

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An examination is made of the ion velocity distributions and reactivity of self-sustaining D-^3He fusion plasmas. Contrary to D-T fusion, the distribution functions of fuel ions in D-^3He plasma depart to a certain extent from a Maxwellian. The dominant mechanism of producing non-Maxwellian (tail) components is nuclear elastic scattering (NES) of energetic protons from ^3He (d, p) ^4He. So-called "tail-pulling" effect due to Coulomb interactions does not appear. The NES-created tail ions modify the reaction rate parameters. It is shown that at a typical operating state (T^bulk_i = 100 keV), the D-D [D-T] reaction rate parameter increases by 10-20% [decreases by 10%], while the main D-^3He reaction remains almost unchanged. Recent studies on fusion reactions of spin-polarized deuterons are also reported.
社団法人プラズマ・核融合学会の論文
1995-06-25