Uniformity of spherical shock wave dynamically stabilized by two successive laser profiles in direct-drive inertial confinement fusion implosions

作者：Temporal M^*; Canaud B; Garbett W J; Ramis R

来源：Physics of Plasmas, 2015, 22(10): 102709.

DOI：10.1063/1.4934712

The implosion uniformity of a directly driven spherical inertial confinement fusion capsule is considered within the context of the Laser Megajoule configuration. Two-dimensional (2D) hydrodynamic simulations have been performed assuming irradiation with two laser beam cones located at 49 degrees and 131 degrees with respect to the axis of symmetry. The laser energy deposition causes an inward shock wave whose surface is tracked in time, providing the time evolution of its non-uniformity. The illumination model has been used to optimize the laser intensity profiles used as input in the 2D hydro-calculations. It is found that a single stationary laser profile does not maintain a uniform shock front over time. To overcome this drawback, it is proposed to use two laser profiles acting successively in time, in order to dynamically stabilize the non-uniformity of the shock front.

• 出版日期2015-10
• 单位中国地震局