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Alpha particle stopping in a dense burning plasma

J. D'Avanzo, M. Lontano, E. Tome', P.F. Bortignon1995年被引用 3Nuclear FusionIF 3出版社

The process of the slowing down of 3.5 MeV fusion alpha particles in dense thermonuclear plasmas, characterizing the inertial confinement fusion (ICF) scheme, is investigated on the basis of a full dielectric theory that describes both the electron response and the ion response. It is shown that, with increasing plasma density, the collective behaviour of the plasma becomes more and more important in determining the alpha particle energy losses. The electrostatic potential and the stopping power of alpha particles are computed for different particle velocities and temperature ratios, Te/Ti. In addition, the fuel-areal density, ρR, is calculated and compared with the results of recent theories. It is demonstrated that individual particle models overestimate ρR values of ICF alphas by almost 20%

日本語訳

高密度熱核プラズマ中の3.5 MeV核融合アルファ粒子の減速過程は、慣性核融合(ICF)方式を特徴づけるものであり、電子応答とイオン応答の両方を記述する完全な誘電理論に基づいて調べられる。プラズマ密度が増加するにつれて、プラズマの集団的挙動がアルファ粒子のエネルギー損失を決定する上でますます重要になることが示される。アルファ粒子の静電ポテンシャルと阻止能は、異なる粒子速度および温度比Te/Tiに対して計算される。さらに、燃料面密度ρRが計算され、最近の理論の結果と比較される。個別粒子モデルはICFアルファ粒子のρR値を約20%過大評価することが実証される。

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