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Title: Numerical simulation study of positron production by intense laser-accelerated electrons

Positron production by ultra-intense laser-accelerated electrons has been studied with two-dimensional particle-in-cell and Monte Carlo simulations. The dependence of the positron yield on plasma density, plasma length, and converter thickness was investigated in detail with fixed parameters of a typical 100 TW laser system. The results show that with the optimal plasma and converter parameters a positron beam containing up to 1.9 × 10{sup 10} positrons can be generated, which has a small divergence angle (10°), a high temperature (67.2 MeV), and a short pulse duration (1.7 ps)
Authors:
 [1] ;  [2] ; ; ; ;  [3] ;  [1]
  1. School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000 (China)
  2. (China)
  3. Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900 (China)
Publication Date:
OSTI Identifier:
22218551
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 10; 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; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPUTERIZED SIMULATION; ELECTRON TEMPERATURE; ELECTRONS; ION TEMPERATURE; LASERS; LIGHT TRANSMISSION; MEV RANGE; MONTE CARLO METHOD; NUMERICAL ANALYSIS; PLASMA DENSITY; PLASMA SIMULATION; POSITRON BEAMS; POSITRONS; TWO-DIMENSIONAL CALCULATIONS