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Low Mach-number collisionless shocks and associated ion acceleration | | Istvan Pusztai
; Jason M. TenBarge
; Aletta N. Csapó
; Tünde Fülöp
; | | Date: |
1 Sep 2017 | | Abstract: | The existence and properties of low Mach-number 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. Using this semi-analytical model, we 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. | | Source: | arXiv, 1709.0356 | | Services: | Forum | Review | PDF | Favorites | |
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