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Monte Carlo simulations of ionization potential depression in dense plasmas
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SYSNO ASEP 0463125 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Monte Carlo simulations of ionization potential depression in dense plasmas Author(s) Stránský, Michal (FZU-D) Article number 012708 Source Title Physics of Plasmas - ISSN 1070-664X
Roč. 23, č. 1 (2016), 1-5Number of pages 5 s. Language eng - English Country US - United States Keywords Monte Carlo methods ; aluminium ; plasma temperature ; computer modeling ; ionization Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects LG15013 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 UT WOS 000375853700041 EID SCOPUS 84961303899 DOI 10.1063/1.4940313 Annotation A particle-particle grand canonical Monte Carlomodel with Coulomb pair potential interaction was used to simulate modification of ionization potentials by electrostatic microfields. The Barnes-Hut tree algorithm was used to speed up calculations of electric potential. Atomic levels were approximated to be independent of the microfields as was assumed in the original paper by Ecker and Kröll; however, the available levels were limited by the corresponding mean inter-particle distance. The code was tested on hydrogen and dense aluminum plasmas. The amount of depression was up to 50% higher in the Debye-Hückel regime for hydrogen plasmas, in the high density limit, reasonable agreement was found with the Ecker-Kröll model for hydrogen plasmas and with the Stewart-Pyatt model for aluminumplasmas. Our 3D code is an improvement over the spherically symmetric simplifications of the Ecker-Kröll and Stewart-Pyatt models and is also not limited to high atomic numbers.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2017
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