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Shock ignition: an alternative scheme for HiPER

X Ribeyre, G Schurtz, M Lafon, S Galera, S Weber2009年Plasma Physics and Controlled FusionIF 2.2出版社

Two main paths are now under investigation that aim at thermonuclear ignition of hydrogen isotopes using lasers: central hot spot self-ignition and externally driven fast ignition of preassembled fuel. A third, intermediate, scheme is shock ignition, which combines the simplicity of self-ignition capsules to the hydrodynamic robustness of the fast ignition fuel assembly. This study addresses the potential of shock ignition for the HiPER project and provides a preliminary assessment of possible detrimental effects. Monodimensional simulations are performed to study the robustness of the ignition scheme in terms of shock launching time and laser power. Bidimensional simulations address the sensitivity of shock ignition to irradiation nonuniformity and to low mode asymmetries of the fuel assembly.

日本語訳

現在、水素同位体のレーザーによる熱核点火を目指して研究されている主な経路は2つある:中心ホットスポット自己点火と、外部駆動による高速点火である。第3の、中間的な方式として衝撃点火がある。これは、自己点火キャプセルの単純さと、高速点火燃料集合体の流体力学的頑健性を組み合わせたものである。本研究は、HiPER計画における衝撃点火の可能性を検討し、潜在的な悪影響の予備的評価を提供する。一次元シミュレーションを実施し、衝撃波の発生タイミングとレーザー出力に関する点火スキームの頑健性を調査する。二次元シミュレーションでは、照射不均一性と燃料集合体の低次モード非対称性に対する衝撃点火の感度を評価する。

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