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首页> 外文期刊>Nuclear fusion >High-gain direct-drive target design for the Laser Megajoule
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High-gain direct-drive target design for the Laser Megajoule

机译：激光兆焦耳的高增益直接驱动目标设计

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摘要

In the context of the French Laser-Megajoule fusion-research programme, a direct-drive target design is developed. It is based on the use of a CH-foam ablator filled with cryogenic deuterium-tritium. One-dimensional optimization leads to a potential gain of 60 with a 1.5 MJ laser. The hydrodynamic stability of the implosion is investigated at the ablation front and the hot-spot surface by means of modelling and two-dimensional simulations. The effect of irradiation non-uniformities on low-mode (time-dependent) implosion asymmetries is studied by two-dimensional hydrodynamics simulations with three-dimensional laser-light raytracing. The effect of beam focal shapes on hot spot low-mode asymmetries is also addressed.
机译：在法国激光-兆焦耳融合研究计划的背景下，开发了直接驱动目标设计。它基于使用填充有低温氘-的CH泡沫消融剂的使用。一维优化可在1.5 MJ激光下产生60的潜在增益。通过建模和二维模拟，研究了在烧蚀锋面和热点表面的内爆流体动力学稳定性。通过二维流体动力学模拟和三维激光射线追踪，研究了辐照不均匀性对低模（随时间变化）内爆不对称性的影响。还解决了光束焦点形状对热点低模不对称性的影响。

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