中国物理B ›› 2016, Vol. 25 ›› Issue (8): 85202-085202.doi: 10.1088/1674-1056/25/8/085202
• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇 下一篇
Xin Li(李欣), Chang-Shu Wu(吴畅书), Zhen-Sheng Dai(戴振生), Wu-Di Zheng(郑无敌), Jian-Fa Gu(谷建法), Pei-Jun Gu(古培俊), Shi-Yang Zou(邹士阳), Jie Liu(刘杰), Shao-Ping Zhu(朱少平)
Xin Li(李欣), Chang-Shu Wu(吴畅书), Zhen-Sheng Dai(戴振生), Wu-Di Zheng(郑无敌), Jian-Fa Gu(谷建法), Pei-Jun Gu(古培俊), Shi-Yang Zou(邹士阳), Jie Liu(刘杰), Shao-Ping Zhu(朱少平)
摘要:
In this paper, a six-cylinder-port hohlraum is proposed to provide high symmetry flux on capsule. It is designed to ignite a capsule with 1.2-mm radius in indirect-drive inertial confinement fusion (ICF). Flux symmetry and laser energy are calculated by using three-dimensional view factor method and laser energy balance in hohlraum. Plasma conditions are analyzed based on the two-dimensional radiation-hydrodynamic simulations. There is no Ylm (l≤4) asymmetry in the six-cylinder-port hohlraum when the influences of laser entrance holes (LEHs) and laser spots cancel each other out with suitable target parameters. A radiation drive with 300 eV and good flux symmetry can be achieved by using a laser energy of 2.3 MJ and peak power of 500 TW. According to the simulations, the electron temperature and the electron density on the wall of laser cone are high and low, respectively, which are similar to those of outer cones in the hohlraums on National Ignition Facility (NIF). And the laser intensity is also as low as those of NIF outer cones. So the backscattering due to laser plasma interaction (LPI) is considered to be negligible. The six-cyliner-port hohlraum could be superior to the traditional cylindrical hohlraum and the octahedral hohlraum in both higher symmetry and lower backscattering without supplementary technology at an acceptable laser energy level. It is undoubted that the hohlraum will add to the diversity of ICF approaches.
中图分类号: (Laser inertial confinement)