Numerical models of the ion-acoustic collisionless shock

Dudnikova, G. I.; Efimova, A. A.

doi:10.1063/1.4964992

Cited by 1 publication

(2 citation statements)

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“…Electron distribution functions assuming adiabatic trapping throughout the m e v 2 /2 < eφ max region of phase space have been considered previously 23,24 . Even though trapping can occur in the cases that we will consider, it is restricted to the regions bounded by the local potential minima of the downstream oscillation: m e v 2 /(2e) < φ max − φ min,−1 , where φ min,−1 denotes a local potential minimum.…”

Section: Electrostatic Shockmentioning

confidence: 99%

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Low Mach-number collisionless electrostatic shocks and associated ion acceleration

Pusztai

TenBarge

Csapó

et al. 2018

Plasma Phys. Control. Fusion

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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. 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.

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Section: Electrostatic Shockmentioning

confidence: 99%

“…max region of phase space have been considered previously [23,24]. Even though trapping can occur in the cases that we will consider, it is restricted to the regions bounded by the local potential minima of the downstream oscillation:…”

Section: Electrostatic Shockmentioning

confidence: 99%