Robust relativistic electron mirrors in laser wakefields for enhanced Thomson backscattering

Jie Mu, Fei Yu Li, Ming Zeng, Min Chen, Zheng-Ming Sheng, Jie Zhang

Research output: Contribution to journalArticle

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106 Downloads (Pure)

Abstract

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.

Original languageEnglish
Article number261114
Number of pages4
JournalApplied Physics Letters
Volume103
Issue number26
DOIs
Publication statusPublished - 23 Dec 2013

Keywords

  • plasma waves
  • electron shattering
  • backscattering
  • plasma

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