A credible model describing radiation-driven implosion in cylindrical hohlraums

A one-dimensional model describing the radiation-driven implosion in cylindrical hohlraums is proposed in this article. For the model, the radiation flux boundary condition is composed of both the equilibrium and the nonequilibrium parts by means of the experimentally measured radiation temperature...

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Bibliographic Details
Published in:Physics of plasmas 2006-02, Vol.13 (2)
Main Authors: Chang, Tieqiang, Sheng, Jiatian, Miao, Wenyong, Li, Yunsheng, Jiang, Shaoen, Pei, Wenbing, Chen, Jiabin, Gao, Yaoming, Yang, Jiamin, Feng, Tinggui, Zheng, Zhijian, Zhang, Lifa, Ding, Yongkun, Li, Jinghong, Li, Meng
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOUNDARY CONDITIONS
CAPSULES
COMPUTERIZED SIMULATION
CYLINDRICAL CONFIGURATION
ELECTRON TEMPERATURE
IMPLOSIONS
ION TEMPERATURE
LASERS
LIGHT TRANSMISSION
NEUTRONS
NUCLEAR REACTION YIELD
ONE-DIMENSIONAL CALCULATIONS
PHOTON EMISSION
PLASMA
PLASMA INSTABILITY
PLASMA SIMULATION
RADIATION FLUX
X-RAY SOURCES
X-RAY SPECTRA
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Summary:A one-dimensional model describing the radiation-driven implosion in cylindrical hohlraums is proposed in this article. For the model, the radiation flux boundary condition is composed of both the equilibrium and the nonequilibrium parts by means of the experimentally measured radiation temperature and the nonequilibrium x-ray spectra emitted from laser spots. The correctness of the model is guaranteed by a criterion, the capsule-absorbed radiation energy inferred from the hohlraum radiation theory, which is independent of any implosion simulation [Chang et al. , Phys. Plasmas 11, 4286 (2004)]. In this article the model is applied to the implosion experiments performed at the Shenguang II laser facility [Zunqi et al. , Chin. J. Lasers, B10, 6 (2001)], and the neutron yields are consistent with the experimental data if the hydrodynamic instability is appropriately considered.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.2172181