skip to main content

SciTech ConnectSciTech Connect

Title: Robust relativistic electron mirrors in laser wakefields for enhanced Thomson backscattering

By adopting an up-ramp density profile, we propose to generate relativistic electron mirrors from laser-driven underdense plasma waves, which are insensitive to finite thermal temperature within a certain range. Along the density ramp, premature wavebreaking due to thermal effects is shown to be well mitigated. Under sufficiently high amplitudes of wake excitation, overcritical dense electron mirrors can pile up when approaching the end of the up-ramp. The consequent mirror speed can be stably driven to the group velocity of the laser propagating in a corresponding uniform plasma. Compared with using purely uniform but thermal plasmas, the present thermal-insensitive mirrors can provide enhanced scattering efficiency and spectral upshift for a counter-propagating probe pulse. These observations are confirmed by multi-dimensional particle-in-cell simulations.
Authors:
; ; ;  [1] ;  [1] ;  [2] ;  [1] ;  [3]
  1. Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China)
  2. (United Kingdom)
  3. (China)
Publication Date:
OSTI Identifier:
22217708
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 26; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLITUDES; BACKSCATTERING; COMPARATIVE EVALUATIONS; DENSITY; ELECTRONS; EXCITATION; LASERS; LIGHT TRANSMISSION; MIRRORS; PLASMA SIMULATION; PLASMA WAVES; RELATIVISTIC PLASMA; RELATIVISTIC RANGE