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Title: Dynamics of laser mass-limited foil interaction at ultra-high laser intensities

By using three-dimensional particle-in-cell simulations with synchrotron radiation damping incorporated, dynamics of ultra-intense laser driven mass-limited foils is presented. When a circularly polarized laser pulse with a peak intensity of ∼10{sup 22} W/cm{sup 2} irradiates a mass-limited nanofoil, electrons are pushed forward collectively and a strong charge separation field forms which acts as a “light sail” and accelerates the protons. When the laser wing parts overtake the foil from the foil boundaries, electrons do a betatron-like oscillation around the center proton bunch. Under some conditions, betatron-like resonance takes place, resulting in energetic circulating electrons. Finally, bright femto-second x rays are emitted in a small cone. It is also shown that the radiation damping does not alter the foil dynamics radically at considered laser intensities. The effects of the transverse foil size and laser polarization on x-ray emission and foil dynamics are also discussed.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ; ; ; ;  [1] ;  [5]
  1. College of Science, National University of Defense Technology, Changsha 410073 (China)
  2. (China)
  3. Key Laboratory for Laser Plasmas (MoE) and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China)
  4. (United Kingdom)
  5. Institut für Theoretische Physik I, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf (Germany)
Publication Date:
OSTI Identifier:
22300189
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 5; 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; BETATRONS; CONES; DAMPING; ELECTRONS; EMISSION; FOILS; LASERS; MASS; OSCILLATIONS; PEAKS; PLASMA SIMULATION; POLARIZATION; PROTONS; PULSES; RADICALS; RESONANCE; SYNCHROTRON RADIATION; THREE-DIMENSIONAL CALCULATIONS; X RADIATION