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This content will become publicly available on December 19, 2018

Title: Low Mach-number collisionless electrostatic shocks and associated ion acceleration

The existence and properties of low Mach-number (M >~ 1) electrostatic collisionless shocks are investigated with a semi-analytical solution for the shock structure. We show that the properties of the shock obtained in the semi-analytical model can be well reproduced in fully kinetic Eulerian Vlasov-Poisson simulations, where the shock is generated by the decay of an initial density discontinuity. By using this semi-analytical model, we also study the effect of electron-to-ion temperature ratio and presence of impurities on both the maximum shock potential and Mach number. We find that even a small amount of impurities can influence the shock properties significantly, including the reflected light ion fraction, which can change several orders of magnitude. Electrostatic shocks in heavy ion plasmas reflect most of the hydrogen impurity ions.
Authors:
ORCiD logo [1] ; ORCiD logo [2] ;  [1] ;  [3] ;  [4] ;  [1] ;  [1]
  1. Chalmers Univ. of Technology, Goteborg (Sweden). Dept. of Physics
  2. Univ. of Maryland, College Park, MD (United States). Inst. for Research in Electronics and Applied Physics; Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences; Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  3. Univ. of Maryland, College Park, MD (United States). Inst. for Research in Electronics and Applied Physics
  4. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Grant/Contract Number:
AGS-1622306; ERC-2014-CoG 647121; 330-2014-6313; AC02-09CH11466
Type:
Accepted Manuscript
Journal Name:
Plasma Physics and Controlled Fusion
Additional Journal Information:
Journal Volume: 60; Journal Issue: 3; Journal ID: ISSN 0741-3335
Publisher:
IOP Science
Research Org:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org:
USDOE; National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; collisonless shock; ion acceleration; laser plasma
OSTI Identifier:
1414905