X-ray conversion efficiency and radiation non-uniformity in the hohlraum experiments at Shenguang-III prototype laser facility

Journal Article · Sat Nov 15 00:00:00 EST 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4901919· OSTI ID:22403281

Zhang, Huasen; Song, Peng; Zou, Shiyang; Zhao, Yiqing; Zheng, Wudi; Gu, Peijun; Pei, Wenbing ^[1]; Yang, Dong; Li, Sanwei; Li, Zhichao; Guo, Liang; Wang, Feng; Peng, Xiaoshi; Wei, Huiyue; Xu, Tao; Jiang, Shaoen; Ding, Yongkun ^[2]

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1. Institute of Applied Physics and Computational Mathematics, Beijing 10088 (China)
2. Research Center of Laser Fusion, Chinese Academy of Engineering Physics, Mianyang 62190 (China)

The hohlraum radiation properties are studied experimentally by the Shenguang-III prototype laser facility and numerically by the two-dimensional code LARED with the multi-group radiation transfer model. The measured radiation temperature is consistent with the prediction of the simulations in a wide laser energy range, suggesting that the x-ray conversion efficiency is around 75% at the peak radiation temperature. The delicate hohlraum experiments further show that the radiation intensity inside the hohlraum is significantly non-uniform. The measured radiation flux of the hot spot region is over twice higher than that of the re-emitted wall region. Good agreements between the experiments and simulations further demonstrate the validity of the LARED code to study the hohlraum radiation properties.

• OSTI ID: 22403281
• Journal Information: Physics of Plasmas, Vol. 21, Issue 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CONVERSION
EFFICIENCY
LASERS
RADIATION FLUX
SIMULATION
TWO-DIMENSIONAL SYSTEMS
X RADIATION