A spherical shell target scheme for laser-driven neutron sources

doi:10.1063/1.4936828

CORC > 北京大学 > 工学院

	A spherical shell target scheme for laser-driven neutron sources
	He, Min-Qing ; Cai, Hong-Bo ; Zhang, Hua ; Dong, Quan-Li ; Zhou, Cang-Tao ; Wu, Si-Zhong ; Sheng, Zheng-Ming ; Cao, Li-Hua ; Zheng, Chun-Yang ; Wu, Jun-Feng ; Chen, Mo ; Pei, Wen-Bing ; Zhu, Shao-Ping ; He, X. T.
刊名	PHYSICS OF PLASMAS
	2015
关键词	DEUTERIUM CLUSTERS NUCLEAR-FUSION EXPLOSIONS
DOI	10.1063/1.4936828
英文摘要	A scheme for neutron production is investigated in which an ultra-intense laser is irradiated into a two-layer (deuterium and aurum) spherical shell target through the cone shaped entrance hole. It is found that the energy conversion efficiency from laser to target can reach as high as 71%, and deuterium ions are heated to a maximum energy of several MeV from the inner layer surface. These ions are accelerated towards the center of the cavity and accumulated finally with a high density up to tens of critical density in several picoseconds. Two different mechanisms account for the efficient yield of the neutrons in the cavity: (1) At the early stage, the neutrons are generated by the high energy deuterium ions based on the "beam-target" approach. (2) At the later stage, the neutrons are generated by the thermonuclear fusion when the most of the deuterium ions reach equilibrium in the cavity. It is also found that a large number of deuterium ions accelerated inward can pass through the target center and the outer Au layer and finally stopped in the CD2 layer. This also causes efficient yield of neutrons inside the CD2 layer due to "beam-target" approach. A postprocessor has been designed to evaluate the neutron yield and the neutron spectrum is obtained. (C) 2015 AIP Publishing LLC.; National Natural Science Foundation of China [11305013, 91230205, 11175030, 11475030, 11147025, 11274152, 11275028]; National Key Basic Research Program of China [2013CBA01500]; National High Technology and Development Program of China; SCI(E); EI; ARTICLE; he_minqing@iapcm.ac.cn; cai_hongbo@iapcm.ac.cn; 12; 22
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/435655]
专题	工学院
推荐引用方式 GB/T 7714	He, Min-Qing,Cai, Hong-Bo,Zhang, Hua,et al. A spherical shell target scheme for laser-driven neutron sources[J]. PHYSICS OF PLASMAS,2015.
APA	He, Min-Qing.,Cai, Hong-Bo.,Zhang, Hua.,Dong, Quan-Li.,Zhou, Cang-Tao.,...&He, X. T..(2015).A spherical shell target scheme for laser-driven neutron sources.PHYSICS OF PLASMAS.
MLA	He, Min-Qing,et al."A spherical shell target scheme for laser-driven neutron sources".PHYSICS OF PLASMAS (2015).