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Title: Reducing wall plasma expansion with gold foam irradiated by laser

The experimental study on the expanding plasma movement of low-density gold foam (∼1% solid density) irradiated by a high power laser is reported in this paper. Experiments were conducted using the SG-III prototype laser. Compared to solid gold with 19.3 g/cc density, the velocities of X-ray emission fronts moving off the wall are much smaller for gold foam with 0.3 g/cc density. Theoretical analysis and MULTI 1D simulation results also show less plasma blow-off, and that the density contour movement velocities of gold foam are smaller than those of solid gold, agreeing with experimental results. These results indicate that foam walls have advantages in symmetry control and lowering plasma fill when used in ignition hohlraum.
Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1]
  1. Research Center of Laser Fusion, China Academy of Engineering Physics, P.O. Box 919-986, Mianyang 621900 (China)
Publication Date:
OSTI Identifier:
22489816
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 11; Other Information: (c) 2015 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; EXPERIMENT RESULTS; FOAMS; GOLD; LASER RADIATION; ONE-DIMENSIONAL CALCULATIONS; PLASMA; PLASMA EXPANSION; SIMULATION; SOLIDS; THERMONUCLEAR IGNITION; WALLS; X RADIATION