Study on size of laser entrance hole shield for ignition octahedral   spherical hohlraums

doi:10.1017/S0263034615000890

CORC > 北京大学 > 工学院

	Study on size of laser entrance hole shield for ignition octahedral spherical hohlraums
	Li, Shu ; Lan, Ke ; Liu, Jie
刊名	LASER AND PARTICLE BEAMS
	2015
关键词	Laser-plasma interaction Hohlraum geometry Laser entrance hole INERTIAL CONFINEMENT FUSION TARGETS FACILITY
DOI	10.1017/S0263034615000890
英文摘要	In this paper, the influences of laser entrance hole shields on capsule symmetry and coupling efficiency of an ignition octahedral spherical hohlraum are studied using analytical model and three-dimensional Monte-Carlo simulations. As a result, there are two critical shield radii at which the capsule asymmetry tends to minimum, and the coupling efficiency from hohlraum to capsule reaches its maximum when the shield size is taken around the second critical radius. For the ignition octahedral hohlraums used in our study, the first critical radius is 0.625 mm with a capsule asymmetry of 0.24%, and the second is 0.86 mm with 0.26%, and the asymmetry is smaller than 0.58% for shields' radius in the range of 0.44 and 0.88 mm, which therefore leaves much flexibility in the shield radius design even the shields have an expansion under radiation ablation. The initial shield radius can be taken around the first critical radius in the ignition target design, not only to have a minimum initial capsule radiation asymmetry, but also to get a minimum asymmetry and highest coupling efficiency during the main pulse of drive. Finally, the relative flux of laser spot, wall and shields is 2.2:1:0.6 for our ignition octahedral spherical hohlraum model from the Monte-Carlo simulations.; National Natural Science Foundation of China [11475033]; Fundamental Research Program of CAEP [2012A0102005, 2013A0102002]; SCI(E); EI; ARTICLE; lan_ke@iapcm.ac.cn; 4; 731-739; 33
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/439200]
专题	工学院
推荐引用方式 GB/T 7714	Li, Shu,Lan, Ke,Liu, Jie. Study on size of laser entrance hole shield for ignition octahedral spherical hohlraums[J]. LASER AND PARTICLE BEAMS,2015.
APA	Li, Shu,Lan, Ke,&Liu, Jie.(2015).Study on size of laser entrance hole shield for ignition octahedral spherical hohlraums.LASER AND PARTICLE BEAMS.
MLA	Li, Shu,et al."Study on size of laser entrance hole shield for ignition octahedral spherical hohlraums".LASER AND PARTICLE BEAMS (2015).