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

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.
Authors:
; ; ; ; ; ;  [1] ; ; ; ; ; ; ; ; ; ;  [2]
  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)
Publication Date:
OSTI Identifier:
22403281
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CONVERSION; EFFICIENCY; LASERS; RADIATION FLUX; SIMULATION; TWO-DIMENSIONAL SYSTEMS; X RADIATION