Scaling of rise time of drive current on development of magneto-Rayleigh–Taylor instabilities for single-shell Z-pinches  

作　　者：Xiaoguang Wang Guanqiong Wang Shunkai Sun Delong Xiao Ning Ding Chongyang Mao Xiaojian Shu 王小光;王冠琼;孙顺凯;肖德龙;丁宁;毛重阳;束小建(Institute of Applied Physics and Computational Mathematics,Beijing 100094,China)

机构地区：[1]Institute of Applied Physics and Computational Mathematics,Beijing 100094,China

出　　处：《Chinese Physics B》2022年第2期471-479,共9页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11975057,11605013,11775023,and 11705013)。

摘　　要：In fast Z-pinches,rise time of drive current plays an important role in development of magneto-Rayleigh–Taylor(MRT)instabilities.It is essential for applications of Z-pinch dynamic hohlraum(ZPDH),which could be used for driving inertial confinement fusion(ICF),to understand the scaling of rise time on MRTs.Therefore,a theoretical model for nonlinear development of MRTs is developed according to the numerical analysis.It is found from the model that the implosion distance L=r_(0)-r_(mc)determines the development of MRTs,where r_(0)is the initial radius and rmc is the position of the accelerating shell.The current rise timeτwould affect the MRT development because of its strong coupling with the r;.The amplitude of MRTs would increase with the rise time linearly if an implosion velocity is specified.The effects of the rise time on MRT,in addition,are studied by numerical simulation.The results are consistent with those of the theoretical model very well.Finally,the scaling of the rise time on amplitude of MRTs is obtained for a specified implosion velocity by the theoretical model and numerical simulations.

关 键 词：magneto-Rayleigh-Taylor instability rise time Z-PINCH MAGNETOHYDRODYNAMIC 

分 类 号：O571.44[理学—粒子物理与原子核物理] O53[理学—物理]