Effect of Coulomb Focusing on the Electron–Atom Bremsstrahlung Cross Section for Tungsten and Iron in Nonthermal Lorentzian Plasmas
Source abstract
Abstract
The Coulomb focusing effect on the electron–atom bremsstrahlung spectrum is investigated in nonthermal Lorentzian plasmas. The universal expression of the cross section of nonrelativistic electron–atom bremsstrahlung process is obtained by the solution of the Thomas-Fermi equation with the effective atomic charge. The effective Coulomb focusing for the electron–atom bremsstrahlung cross section near the threshold domain is also investigated by adopting the modified Elwert-Sommerfeld factor with the mean effective charge for the bremsstrahlung process. In addition, the bremsstrahlung emission rates are obtained by considering encounters between nonthermal electrons and atoms such as Fe and W atoms. We found that the bremsstrahlung emission rates for nonthermal electron–atoms are lower than those for thermal plasmas. Various nonthermal effects on the bremsstrahlung emission rates in Lorentzian plasmas are also discussed.
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Research context
OpenAlex topics: Dust and Plasma Wave Phenomena · High-pressure geophysics and materials · Laser-induced spectroscopy and plasma
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, Hanyang University, Seoul 04763, Korea
Research Institute for Natural Sciences, Hanyang University, Seoul 04763, Korea
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
Department of Applied Physics, Hanyang University, Ansan, Kyunggi-Do 15588, Korea
Funding
National Research Foundation of Korea
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