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Title: Shock-ignition relevant experiments with planar targets on OMEGA

We report on laser-driven, strong-shock generation and hot-electron production in planar targets in the presence of a pre-plasma at shock-ignition (SI) relevant laser and pre-plasma conditions. 2-D simulations reproduce the shock dynamics well, indicating ablator shocks of up to 75 Mbar have been generated. We observe hot-electron temperatures of ∼70 keV at intensities of 1.4 × 10{sup 15} W/cm{sup 2} with multiple overlapping beams driving the two-plasmon decay instability. When extrapolated to SI-relevant intensities of ∼10{sup 16} W/cm{sup 2}, the hot electron temperature will likely exceed 100 keV, suggesting that tightly focused beams without overlap are better suited for launching the ignitor shock.
Authors:
; ; ; ; ; ; ;  [1] ; ; ;  [1] ;  [2] ; ;  [1] ;  [2] ;  [2] ;  [3] ;  [4] ; ;  [5]
  1. Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623 (United States)
  2. (United States)
  3. CEA, DAM, DIF, Arpajon (France)
  4. Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550 (United States)
  5. Centre Lasers Intenses et Applications, CELIA, Université Bordeaux 1-CEA-CNRS, Talence (France)
Publication Date:
OSTI Identifier:
22252086
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 2; 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; BEAMS; DECAY INSTABILITY; ELECTRON TEMPERATURE; ELECTRONS; LASERS; PLASMA; SIMULATION; THERMONUCLEAR IGNITION; TWO-DIMENSIONAL CALCULATIONS