论文部分内容阅读
Inertial confinement fusion (ICF) using indirect- drive relies on highly symmetric x-ray radiations of hohlraum to compresses the deuterium- tritium (DT) fuel spherically to achieve the sufficient high temperature and density for the ignition.Due the limited driven laser energy,the typical ignition target designs adopt the high convergence implosion.,which requires that the x-ray drive symmetry must be better than that of~1 %.This is simple because that any small nonuniformities of x-ray drive can be amplified by the high convergence implosion by a factor of the convergence ratio Cr which is defined as the ratio of initial outer radius of the capsule to the final radius of the hot spot.The larger amplification of driven asymmetry leads to the significant capsule distortion and performance degradation.Consequently,controlling and tuning the x-ray driven symmetry is one of the main challenge in achieving the ignition.