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Laser implosion of microballoons: study of the transition from exploding-pusher to ablative regime

C. Bayer, M. Bernard, D. Billon, M. Decroisette, D. Galmiche, D. Juraszek, J. Launspach, D. Meynial, B. Sitt1984年被引用 29Nuclear FusionIF 3出版社

Microballoons filled with an equimolar deuterium-tritium mixture and coated with a plastic ablator of variable thickness are imploded by the eight-beam Octal laser (λ = 1.06 μm; 0.6 TW). An X-ray diagnostic with space-time resolution is used to analyse the implosion of the targets designed to the highest ∫ ρdr. The experimental results are compared with numerical simulations performed by a one-dimensional Lagrangian code. A DT density of about 2 g·cm−3 is obtained; the transition from an exploding-pusher regime to a more ablative one is analysed on the basis of the evolution of the preheat, the hydrodynamic efficiency and the density and temperature performance.

日本語訳

等モル重水素-トリチウム混合物を充填し、可変厚さのプラスチックアブレータで被覆されたマイクロバルーンは、8ビームOctalレーザー(λ = 1.06 μm; 0.6 TW)によって爆縮される。空間・時間分解能を有するX線診断装置は、最大の∫ρdrを実現するように設計されたターゲットの爆縮を解析するために用いられる。実験結果は、一次元ラグランジュコードによって実行された数値シミュレーションと比較される。約2 g·cm−3のDT密度が得られる;爆発的プッシャー領域からよりアブレーティブな領域への遷移は、予熱、流体力学効率、および密度・温度性能の進展に基づいて解析される。

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