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Title: Dual effects of stochastic heating on electron injection in laser wakefield acceleration

Electron injection into the wakefield of an intense short laser pulse by a weaker laser pulse propagating in the opposite direction is reconsidered using two-dimensional (2D) particle-in-cell simulations as well as analytical modeling. It is found that for linearly polarized lasers the injection efficiency and the quality of the wakefield accelerated electrons increase with the intensity of the injection laser only up to a certain level, and then decreases. Theory and simulation tracking test electrons originally in the beat region of the two laser pulses show that the reduction of the injection efficiency at high injection-laser intensities is caused by stochastic overheating of the affected electrons.
Authors:
;  [1] ;  [2] ;  [1] ;  [2] ;  [3] ;  [4] ;  [1]
  1. Department of Physics, Zhejiang University, Hangzhou 310027 (China)
  2. (China)
  3. Institute of Applied Physics and Computational Mathematics, Beijing 100094 (China)
  4. Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027 (China)
Publication Date:
OSTI Identifier:
22303791
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 8; 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; ACCELERATION; EFFICIENCY; ELECTRON BEAM INJECTION; LASERS; PULSES; SIMULATION; STOCHASTIC PROCESSES; TWO-DIMENSIONAL CALCULATIONS