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Title: High pressure generation by hot electrons driven ablation

A previous model [Piriz et al. Phys. Plasmas 19, 122705 (2012)] for the ablation driven by the hot electrons generated in collisionless laser-plasma interactions in the framework of shock ignition is revisited. The impact of recent results indicating that for a laser wavelength λ = 0.35 μm the hot electron temperature θ{sub H} would be independent of the laser intensity I, on the resulting ablation pressure is considered. In comparison with the case when the scaling law θ{sub H}∼(Iλ{sup 2}){sup 1/3} is assumed, the generation of the high pressures needed for driving the ignitor shock may be more demanding. Intensities above 10{sup 17} W/cm{sup 2} would be required for θ{sub H}=25−30 keV.
Authors:
 [1] ;  [2] ;  [3]
  1. E.T.S.I. Industriales, CYTEMA, and Instituto de Investigaciones Energéticas, Universidad de Castilla-La Mancha, 13071 Ciudad Real (Spain)
  2. Facultad de Ciencias Físicas, Universidad Complutense de Madrid, 28040 Madrid (Spain)
  3. GSI Helmholtzzentrum für Schwerionenforschung, Planckstrasse 1, 64291 Darmstadt (Germany)
Publication Date:
OSTI Identifier:
22218433
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 11; Other Information: (c) 2013 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; 36 MATERIALS SCIENCE; 07 ISOTOPES AND RADIATION SOURCES; ABLATION; BEAM-PLASMA SYSTEMS; COMPARATIVE EVALUATIONS; ELECTRON TEMPERATURE; ELECTRONS; ION TEMPERATURE; KEV RANGE; LASER RADIATION; LASERS; LIGHT TRANSMISSION; PLASMA; PLASMA PRESSURE; SCALING LAWS; THERMONUCLEAR IGNITION