Electric field dynamics at a charged point - Archive ouverte HAL
Article Dans Une Revue Physical Review E Année : 1996

Electric field dynamics at a charged point

Résumé

The autocorrelation function for the electric field at an impurity ion in a plasma is considered. A simple model is constructed that preserves the exact short time dynamics and the long time global constraint of a given self-diffusion coefficient. The input required is the initial value of the autocorrelation function and its derivatives, and the self-diffusion coefficient. These are calculated from the hypernetted chain equations for correlation functions and a `'disconnected'' approximation for the self-diffusion coefficient. A comparison of the predictions of the model for the electric field autocorrelation function with results from molecular dynamics simulation shows good agreement over a wide range of plasma coupling, impurity ion charge, and impurity ion mass. This provides justification for a simple interpretation of electric field dynamics in terms of three collective modes.
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Dates et versions

hal-01796367 , version 1 (19-05-2018)

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Ma Berkovsky, Jw Dufty, Annette Calisti, R Stamm, B Talin. Electric field dynamics at a charged point. Physical Review E , 1996, 54 (4, B), pp.4087-4097. ⟨10.1103/PhysRevE.54.4087⟩. ⟨hal-01796367⟩

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