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Title: Angular radiation temperature simulation for time-dependent capsule drive prediction in inertial confinement fusion

The x-ray drive on a capsule in an inertial confinement fusion setup is crucial for ignition. Unfortunately, a direct measurement has not been possible so far. We propose an angular radiation temperature simulation to predict the time-dependent drive on the capsule. A simple model, based on the view-factor method for the simulation of the radiation temperature, is presented and compared with the experimental data obtained using the OMEGA laser facility and the simulation results acquired with VISRAD code. We found a good agreement between the time-dependent measurements and the simulation results obtained using this model. The validated model was then used to analyze the experimental results from the Shenguang-III prototype laser facility. More specifically, the variations of the peak radiation temperatures at different view angles with the albedo of the hohlraum, the motion of the laser spots, the closure of the laser entrance holes, and the deviation of the laser power were investigated. Furthermore, the time-dependent radiation temperature at different orientations and the drive history on the capsule were calculated. The results indicate that the radiation temperature from “U20W112” (named according to the diagnostic hole ID on the target chamber) can be used to approximately predict the drive temperature onmore » the capsule. In addition, the influence of the capsule on the peak radiation temperature is also presented.« less
Authors:
; ; ; ; ; ;  [1] ; ;  [1] ;  [2] ;  [3]
  1. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900 (China)
  2. (China)
  3. Mechatronics School of Guangdong University of Technology, Guangzhou 510080 (China)
Publication Date:
OSTI Identifier:
22408125
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 2; 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; ALBEDO; CAPSULES; EXPERIMENTAL DATA; INERTIAL CONFINEMENT; LASERS; RADIANT HEAT TRANSFER; SIMULATION; TARGET CHAMBERS; TEMPERATURE DEPENDENCE; THERMONUCLEAR IGNITION; TIME DEPENDENCE; X RADIATION