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Electrostatic shock dynamics in superthermal plasmas
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10.1063/1.3677265
/content/aip/journal/pop/19/1/10.1063/1.3677265
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/1/10.1063/1.3677265
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Dependence of the normalized dependent plasma screening length with .

Image of FIG. 2.
FIG. 2.

(Color online) Dependence of the nonlinear coefficient A and the dispersion coefficient B upon the parameter .

Image of FIG. 3.
FIG. 3.

(Color online) Dependence of the shock width (dashed red line), shock amplitude (dot-dashed blue line), and the shock velocity V in the travelling frame (solid green line) upon the non-thermality parameter assuming .

Image of FIG. 4.
FIG. 4.

(Color online) Temporal evolution of the ion-acoustic shock described by Eq. (17) in a Maxwellian plasma (). and have been considered.

Image of FIG. 5.
FIG. 5.

(Color online) Temporal evolution of the ion-acoustic shock which is a solution for propagating in a superthermal plasma (), which is less dissipative ().

Image of FIG. 6.
FIG. 6.

(Color online) (a) Temporal evolution of an ion-acoustic shock (using as initial condition the stable solution (17) for a Maxwellian plasma), propagating in a strongly superthermal environment (). (b) Temporal evolution of an ion-acoustic shock (using as initial condition the solution which would be stable in a superthermal plasma, for ), propagating in a Maxwellian environment. Here, in both cases.

Image of FIG. 7.
FIG. 7.

(Color online) (a) Shock profile for different values of the dissipative term C, for a fixed velocity in the regime of negligible dispersion, i.e., relying on solution (25) with small perturbation. (b) Shock profile for different values of the velocity V, for fixed dissipation in the regime of negligible dispersion. Here, time in both cases.

Image of FIG. 8.
FIG. 8.

(Color online) Threshold for the stability of dispersionless shock fronts as a function of the non-thermality parameter . The points depict the initial conditions for the numerical simulations shown in the following.

Image of FIG. 9.
FIG. 9.

(Color online) Temporal evolution of Eq. (16) with initial condition given by Eq. (25) for a superthermal plasma (, left panel) and a Maxwellian plasma (, right panel) for . The shock profile exhibits a purely monotonic structure in both cases.

Image of FIG. 10.
FIG. 10.

(Color online) Temporal evolution of Eq. (16) with initial condition given by Eq. (25) for (a) a superthermal plasma (, left panel) and (b) a Maxwellian plasma (, right panel) for . Oscillations are present in both cases.

Image of FIG. 11.
FIG. 11.

(Color online) Temporal evolution of Eq. (16) with initial condition given by Eq. (25) for (a) a superthermal plasma (, left panel) and (b) a Maxwellian plasma (, right panel) for . In both cases, the shock presents large oscillations.

Image of FIG. 12.
FIG. 12.

(Color online) Temporal evolution of Eq. (16) with initial condition given by Eq. (25) for (a) a superthermal plasma (, left panel) and (b) a Maxwellian plasma (, right panel) for . The shock presents oscillations only for the Maxwellian case.

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/content/aip/journal/pop/19/1/10.1063/1.3677265
2012-01-20
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electrostatic shock dynamics in superthermal plasmas
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/1/10.1063/1.3677265
10.1063/1.3677265
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