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P: Fachverband Plasmaphysik

P 18: Poster: Theorie/Modellierung

P 18.22: Poster

Wednesday, April 1, 2009, 17:30–19:30, Foyer des IfP

Electric Microfield Distributions in Nonideal Two-Component Electron-Ion Plasmas with account of the ion structure — •Saltanat Polatovna Sadykova¹, Werner Ebeling¹, Ilya Valuev², and Igor Sokolov¹ — ¹Humboldt-Universität zu Berlin, Newtonstraße 15, 12489 Berlin — ²Joint Institute for High Temperatures of RAS, 125412 Moscow

The electric microfields distribution (EMD) influences many elementary processes in plasma and its optic spectra (OS). In EMD calculations pseudopotentials play a crucial role (S. Sadykova et al.. Contr. Plasma Phys. (CPP) 47, No. 10, 659 (2007)). There is a high interest in the inclusion of ion structure (shell) into the pseudopotential model (PM). One of the successful PMs of electron-ion-core interaction, pioneered by H. Hellmann (J. Chem. Phys 1935), V. Heine “Pseudopotential Theory” 1973, is the unscreened Hellmann-Gurskii-Krasko (HGK) PM ( JETP 10, 363 (1969)). We calculate EMD acting on ions, electrons using Ortner’s et al.(CPP. 40 (2000)), Iglesias’s methods (Phys. Rev. A 27, 2705 (1983)) and Molecular Dynamics tool for the nonideal two-component H⁺, Li¹⁺, Li²⁺ plasmas in a frame of corrected Kelbg (W. Ebeling CPP 39, 61 (1999)), HGK and screened HGK PMs at different plasma parameters (PP) and pay special attention to the behaviour of EMD tails. On a base of work (Yu. Arkhipov Eur. Phys. J. D 2000), we derive the analytical expressions for Fourier transform of the screened HGK which allow to calculate EMD in a wide range of PP. The results of calculations are found in a good agreement with the earlier published theoretical as well as experimental results of OS.