Non-equilibrium between ions and electrons inside hot spots from National Ignition Facility experiments  

作　　者：Zhengfeng Fan Yuanyuan Liu Bin Liu Chengxin Yu Ke Lan Jie Liu 

机构地区：[1]Institute of Applied Physics and Computational Mathematics,Beijing 100088,China [2]Center for Applied Physics and Technology,Peking University,Beijing 100871,China

出　　处：《Matter and Radiation at Extremes》2017年第1期3-8,共6页极端条件下的物质与辐射（英文）

基　　金：This work has been supported by the Foundation of Presi-dent of China Academy of Engineering Physics(Grant Nos.201402037 and 201401040);the CAEP-FESTC(Grant No.R2014-0501-01);the National Basic Research Program of China(Grant No.2013CB34100).

摘　　要：The non-equilibrium between ions and electrons in the hot spot can relax the ignition conditions in inertial confinement fusion[Fan et al.,Phys.Plasmas 23,010703(2016)],and obvious ion-electron non-equilibrium could be observed by our simulations of high-foot implosions when the ion-electron relaxation is enlarged by a factor of 2.On the other hand,in many shots of high-foot implosions on the National Ignition Facility,the observed X-ray enhancement factors due to ablator mixing into the hot spot are less than unity assuming electrons and ions have the same temperature[Meezan et al.,Phys.Plasmas 22,062703(2015)],which is not self-consistent because it can lead to negative ablator mixing into the hot spot.Actually,this non-consistency implies ion-electron non-equilibrium within the hot spot.From our study,we can infer that ion-electron non-equilibrium exists in high-foot implosions and the ion temperature could be~9%larger than the equilibrium temperature in some NIF shots.

关 键 词：Ion-electron non-equilibrium Hot-spot ignition conditions relaxation High-foot experiments 

分 类 号：O57[理学—粒子物理与原子核物理]