Počet záznamů: 1  

Monte Carlo simulations of ionization potential depression in dense plasmas

  1. 1.
    0463125 - FZU-D 2017 RIV US eng J - Článek v odborném periodiku
    Stránský, Michal
    Monte Carlo simulations of ionization potential depression in dense plasmas.
    Physics of Plasmas. Roč. 23, č. 1 (2016), 1-5, č. článku 012708. ISSN 1070-664X
    Grant CEP: GA MŠk LG15013
    Institucionální podpora: RVO:68378271
    Klíčová slova: Monte Carlo methods * aluminium * plasma temperature * computer modeling * ionization
    Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
    Impakt faktor: 2.115, rok: 2016

    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.

    Trvalý link: http://hdl.handle.net/11104/0262399