Influence of radiation-driven asymmetry on capsule compression

Good radiation-driven symmetry is crucial for forming center hot spot in the indirect-driven inertial fusion. In this paper, our goal is to assess quantitatively the impacts of the radiation-driven asymmetry on the capsule compression. For the time-independent asymmetry, the 2D simulations show that the impact of the radiation-driven asymmetry on the capsule distortion and neutron yield will reduce as the convergence ratio of the capsule decreases. The neutron yield will degrade by 30% when the capsule distortion is about 2.0. In the hohlraums utilized in experiments, the asymmetry varies in space and time with different hohlraum lengths. For the length of 1 350 μm, the subsequent reversal of flux nonuniformity will be adequate to eliminate the effects of the earlier asymmetry, thus the c