电子
准直光
物理
计算物理学
磁场
芯(光纤)
不稳定性
光学
机械
核物理学
激光器
量子力学
作者
Chong Lv,Feng Wan,Ya-Juan Hou,Moran Jia,Hai-Bo Sang,Bai-Song Xie,Shibing Liu
出处
期刊:Plasma Physics and Controlled Fusion
[IOP Publishing]
日期:2016-12-13
卷期号:59 (2): 025006-025006
被引量:2
标识
DOI:10.1088/1361-6587/59/2/025006
摘要
A low-density-core target with buried high density layers is proposed to improve the transport of fast electrons and involved problems are investigated by using two-dimensional particle-in-cell simulations. It is demonstrated that this target can collimate the fast electrons efficiently and lead to a better beam quality. The enhancement is attributed to the weakening of the two stream instability and the better collimation by the self-generated multilayer megagauss magnetic field as well as the baroclinic magnetic field. Comparing this to that without buried high density layers, the energy flux of fast electrons is increased by a factor of about 1.8 and has a narrower transverse distribution in space. Besides, the dependence of the efficiency on the target parameters is examined, and the optimal target parameters are also obtained. Such a target can be useful to many applications, such as fast ignition in inertial fusion.
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