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

Abstract

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]
+ Show Author Affiliations
  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:
Research Org.:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE; National Science Foundation (NSF)
OSTI Identifier:
1414905
Grant/Contract Number:  
AGS-1622306; ERC-2014-CoG 647121; 330-2014-6313; AC02-09CH11466
Resource 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
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; collisonless shock; ion acceleration; laser plasma

Citation Formats

Pusztai, Istvan, TenBarge, Jason, Csapó, Aletta N., Juno, James, Hakim, Ammar, Yi, Longqing, and Fulop, Tunde. Low Mach-number collisionless electrostatic shocks and associated ion acceleration. United States: N. p., 2017. Web. doi:10.1088/1361-6587/aaa2cc.
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Pusztai, Istvan, TenBarge, Jason, Csapó, Aletta N., Juno, James, Hakim, Ammar, Yi, Longqing, & Fulop, Tunde. Low Mach-number collisionless electrostatic shocks and associated ion acceleration. United States. https://doi.org/10.1088/1361-6587/aaa2cc
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Pusztai, Istvan, TenBarge, Jason, Csapó, Aletta N., Juno, James, Hakim, Ammar, Yi, Longqing, and Fulop, Tunde. Tue . "Low Mach-number collisionless electrostatic shocks and associated ion acceleration". United States. https://doi.org/10.1088/1361-6587/aaa2cc. https://www.osti.gov/servlets/purl/1414905.
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@article{osti_1414905,
title = {Low Mach-number collisionless electrostatic shocks and associated ion acceleration},
author = {Pusztai, Istvan and TenBarge, Jason and Csapó, Aletta N. and Juno, James and Hakim, Ammar and Yi, Longqing and Fulop, Tunde},
abstractNote = {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.},
doi = {10.1088/1361-6587/aaa2cc},
journal = {Plasma Physics and Controlled Fusion},
number = 3,
volume = 60,
place = {United States},
year = {Tue Dec 19 00:00:00 EST 2017},
month = {Tue Dec 19 00:00:00 EST 2017}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1088/1361-6587/aaa2cc
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Cited by: 14 works
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Figures / Tables:

FIG. 1 FIG. 1: (a) Electrostatic potential of the shock structure showing a monotonic increase from $\phi =0$ to ${\phi }_{\max }$ in the upstream region, and an oscillatory behavior with $0\lt \phi ≤ {\phi }_{\max }$ in the downstream region. (b) Phase-space plot of the ion distribution showing the different populationsmore » (incoming, reflected, passing, and co-passing). In the upstream region the shock potential reflects a fraction of the ions, while in the downstream the density of passing ions is oscillatory in x.« less
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Works referenced in this record:

Discontinuous Galerkin algorithms for fully kinetic plasmas
journal, January 2018

Collisionless shock generation in high-speed counterstreaming plasma flows by a high-power laser
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journal, May 2013

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Modification of the formation of high-Mach number electrostatic shock-like structures by the ion acoustic instability
journal, October 2013

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Laminar shocks in high power laser plasma interactions
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text, January 2015

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text, January 2015

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    Works referencing / citing this record:

    Open-boundary spectral and flux-balance Vlasov simulation
    journal, December 2019

    Shocks and phase space vortices driven by a density jump between two clouds of electrons and protons
    journal, December 2019

    • Moreno, Q.; Dieckmann, M. E.; Folini, D.
    • Plasma Physics and Controlled Fusion, Vol. 62, Issue 2
    • DOI: 10.1088/1361-6587/ab5bfb

    Effect of a weak ion collisionality on the dynamics of kinetic electrostatic shocks
    text, January 2018

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      Figures / Tables found in this record:

      FIG. 1 (p. 3)figure
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      FIG. 3 (p. 6)figure
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      FIG. 10 (p. 9)figure
      FIG. 9 (p. 9)figure
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