Anomalous neutron yield in indirect-drive inertial-confinement-fusion   due to the formation of collisionless shocks in the corona

doi:10.1088/1741-4326/aa686c

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	Anomalous neutron yield in indirect-drive inertial-confinement-fusion due to the formation of collisionless shocks in the corona
	Zhang, Wen-Shuai ; Cai, Hong-Bo ; Shan, Lian-Qiang ; Zhang, Hua-Sen ; Gu, Yu-Qiu ; Zhu, Shao-Ping
刊名	NUCLEAR FUSION
	2017
关键词	inertial confiement fusion collisionless shock wave anomalous neutron yield fast ignition IGNITION SIMULATION GAIN
DOI	10.1088/1741-4326/aa686c
英文摘要	Observations of anomalous neutron yield in the indirect-drive inertial confinement fusion implosion experiments conducted at SG-III prototype and SG-II upgrade laser facilities are interpreted. The anomalous mechanism results in a neutron yield which is 100-times higher than that predicted by 1D radiation-hydrodynamic simulations. 2D radiation-hydrodynamic simulations show that the supersonic, radially directed gold (Au) plasma jets arising from the laser-hohlraum interactions can collide with the carbon-deuterium (CD) corona plasma of the compressed pellet. It is found that in the interaction front of the high-Z jet with the low-Z corona, with low density similar to 10(20) cm(-3) and high temperature similar to keV, kinetic effects become important. Particle-in-cell simulations indicate that an electrostatic shock wave can be driven when the high-temperature Au jet expands into the low-temperature CD corona. Deuterium ions with an amount of similar to 10(15) can be accelerated to similar to 25 keV by the collisionless shock wave, thus causing efficient neutron productions though the beam-target method by stopping these energetic ions in the corona. The evaluated neutron yield is consistent with the experiments conducted at SG laser facilities.; National Natural Science Foundation of China [11575030, 11275028]; Science Challenge Project in China [JCKY2016212A505]; National Key Programme for S&T Research and Development [2016YFA0401100]; SCI(E); ARTICLE; 6; 57
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/473261]
专题	工学院
推荐引用方式 GB/T 7714	Zhang, Wen-Shuai,Cai, Hong-Bo,Shan, Lian-Qiang,et al. Anomalous neutron yield in indirect-drive inertial-confinement-fusion due to the formation of collisionless shocks in the corona[J]. NUCLEAR FUSION,2017.
APA	Zhang, Wen-Shuai,Cai, Hong-Bo,Shan, Lian-Qiang,Zhang, Hua-Sen,Gu, Yu-Qiu,&Zhu, Shao-Ping.(2017).Anomalous neutron yield in indirect-drive inertial-confinement-fusion due to the formation of collisionless shocks in the corona.NUCLEAR FUSION.
MLA	Zhang, Wen-Shuai,et al."Anomalous neutron yield in indirect-drive inertial-confinement-fusion due to the formation of collisionless shocks in the corona".NUCLEAR FUSION (2017).