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Title: Ion heating dynamics in solid buried layer targets irradiated by ultra-short intense laser pulses

We investigate bulk ion heating in solid buried layer targets irradiated by ultra-short laser pulses of relativistic intensities using particle-in-cell simulations. Our study focuses on a CD{sub 2}-Al-CD{sub 2} sandwich target geometry. We find enhanced deuteron ion heating in a layer compressed by the expanding aluminium layer. A pressure gradient created at the Al-CD{sub 2} interface pushes this layer of deuteron ions towards the outer regions of the target. During its passage through the target, deuteron ions are constantly injected into this layer. Our simulations suggest that the directed collective outward motion of the layer is converted into thermal motion inside the layer, leading to deuteron temperatures higher than those found in the rest of the target. This enhanced heating can already be observed at laser pulse durations as low as 100 fs. Thus, detailed experimental surveys at repetition rates of several ten laser shots per minute are in reach at current high-power laser systems, which would allow for probing and optimizing the heating dynamics.
Authors:
 [1] ;  [2] ;  [3] ; ;  [4] ;  [5] ;  [1] ;  [4] ;  [2]
  1. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800 Shanghai (China)
  2. (Germany)
  3. (China)
  4. Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden (Germany)
  5. Shanghai Institute of Laser Plasma, 201800 Shanghai (China)
Publication Date:
OSTI Identifier:
22220628
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 9; 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; ALUMINIUM; DEUTERONS; ELECTRON TEMPERATURE; ION TEMPERATURE; IONS; IRRADIATION; LASERS; LAYERS; PLASMA HEATING; PLASMA SIMULATION; PRESSURE GRADIENTS; RELATIVISTIC PLASMA; RELATIVISTIC RANGE; SOLIDS