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Kinetic simulation of DT ignition and burn in ICF targets

A.M. Oparin, S.I. Anisimov, J. Meyer-Ter-Vehn1996年被引用 17Nuclear FusionIF 3出版社

Ignition and burn of deuterium-tritium (DT) fuel is investigated for inertial confinement fusion (ICF). Collisional kinetic equations describing the interaction of the high energy products of the fusion reactions with the plasma are solved by the particle-in-cell (PIC) method. Results are compared with simpler models, such as local alpha deposition and one-group alpha particle diffusion. Significant differences are found in temperature and density distributions as they evolve during burn. The total fraction of burned fuel is similar for the different models as long as ρR >>1 g/cm2 and T⩾10 keV; for ρR<1 g/cm2 and T<10 keV, however, the kinetic simulation gives considerably lower burn. Uniform as well as spark ignition configurations are simulated for initial temperatures and ρR values of practical interest and for fuel masses between 0.1 and 10 mg. In addition, optically thick configurations igniting at temperatures below 5 keV are considered

日本語訳

重水素-三重水素(DT)燃料の点火と燃焼が、慣性核融合(ICF)について調査される。核融合反応の高エネルギー生成物とプラズマとの相互作用を記述する衝突運動論方程式が、粒子インセル(PIC)法によって解かれる。結果は、局所アルファ粒子沈着やワングループアルファ粒子拡散などのより単純なモデルと比較される。燃焼中の温度分布と密度分布に有意な差異が見出される。燃料の総燃焼割合は、ρR >> 1 g/cm² かつ T ≥ 10 keV の条件下では異なるモデル間で類似しているが、ρR < 1 g/cm² かつ T < 10 keV の条件下では、運動論シミュレーションはかなり低い燃焼を示す。一様点火およびスポーク点火の両構成が、実用的な初期温度とρR値、ならびに0.1 mgから10 mgの燃料質量についてシミュレーションされる。さらに、5 keV未満の温度で点火する光学的に厚い構成も考察される。

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Inertial confinement fusionIgnitionDeuterium-tritium
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