Statistical Approach to Radiation Processes with Heavy Atoms in Plasmas

• Published in: arXiv.org 2013-12
• Main Authors: Demura, Alexander V, Kadomtsev, Mikhail B, Lisitsa, Valery S, Shurygin, Vladimir A
• Format: Article
• Language: English
• Subjects: Atomic structure; Electron density; Elementary excitations; Excitation; Excitation spectra; High temperature plasmas; Mathematical models; Plasma; Plasma frequencies; Plasma radiation; Plasma temperature; Tungsten
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1312.4079

The new statistical approach for calculation of radiation processes with heavy multielectron ions in plasma is developed. The method consists in consideration of atomic structure as a condensed medium, characterized by the spectrum of elementary excitations with plasma frequency, determined by local atomic electron density. For instance, the radiation losses in this model are due to excitation of plasma type oscillations in atom under its collisions with plasma electrons and have a universal statistical representation for all sorts of multielectron ions. The calculations of radiation losses on tungsten ions are performed in the wide range of plasma temperature variation, typical for physics of high temperature plasma with magnetic confinement. It is shown that the universal statistical approach results are within the scattering of current numerical codes data. The proposed statistical method for description of complex atoms collective excitations for calculations of plasma radiation losses is of general physical interest and allows to obtain the necessary data more faster with the lesser computational resources.