skip to main content

SciTech ConnectSciTech Connect

Title: Pre-plasma effect on energy transfer from laser beam to shock wave generated in solid target

Efficiency of the laser radiation energy transport into the shock wave generated in layered planar targets (consisting of massive Cu over coated by thin CH layer) was investigated. The targets were irradiated using two laser pulses. The 1ω pulse with the energy of ∼50 J produced a pre-plasma, imitating the corona of the pre-compressed inertial confinement fusion target. The second main pulse used the 1ω or 3ω laser harmonics with the energy of ∼200 J. The influence of the pre-plasma on parameters of the shock wave was determined from the crater volume measurements and from the electron density distribution measured by 3-frame interferometry. The experimental results show that the energy transport by fast electrons provides a definite contribution to the dynamics of the ablative process, to the shock wave generation, and to the ablation pressure in dependence on the target irradiation conditions. The strong influence of the pre-plasma on the investigated process was observed in the 1ω case. Theoretical analysis supports the explanation of experimental results.
Authors:
; ; ; ; ; ; ;  [1] ; ;  [2] ; ; ; ;  [3] ; ; ; ; ;  [4] ;  [5] more »; « less
  1. Institute of Plasma Physics and Laser Microfusion, Warsaw (Poland)
  2. P.N. Lebedev Physical Institute of RAS, 53 Leninsky Ave., 119 991 Moscow (Russian Federation)
  3. Université Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, Talence (France)
  4. Intense Laser Irradiation Laboratory at INO-CNR, Pisa (Italy)
  5. Institute of Plasma Physics ASCR, v.v.i., ZaSlovankou 3, 182 00 Prague 8 (Czech Republic)
Publication Date:
OSTI Identifier:
22252136
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 1; 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; ELECTRON BEAM TARGETS; ENERGY TRANSFER; ION BEAM TARGETS; IRRADIATION; LASER RADIATION; LASER TARGETS; LASERS; NATURAL GAS DISTRIBUTION SYSTEMS; PLASMA; POWER TRANSMISSION; PULSES; SHOCK WAVES