Equation of state of hydrogen, helium, and solar plasmas. Issue 10 (15th August 2021)

• Record Type: Journal Article
• Authors: Ebeling, Werner; Reinholz, Heidi; Röpke, Gerd
• Other Names: Bonitz Michael guestEditor.; Iosilevskiy Igor guestEditor.; Mintsev Victor guestEditor.; Redmer Ronald guestEditor.
• Is Part Of: Contributions to plasma physics. Volume 61:Issue 10(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-08-15
• Subjects: dense plasma -- equation of state -- ionization equilibrium; Plasma (Ionized gases) -- Periodicals; Electronic journals; 530.44
• DOI: 10.1002/ctpp.202100085
• Languages: English
• ISSNs: 0863-1042

Abstract

Abstract: The equation of state (EOS) for plasmas of the two lightest elements H and He, and mixtures as typical for the plasmas in the sun are calculated. The contributions of deep bound states are included by using inverted fugacity expansions. The inversion of fugacities to densities is reduced to solvable algebraic problems and expressed by rational polynomials. The calculation of relative pressures is carried out separately for low and high densities. Near the crossing point, in between, the separate solutions are connected to each other by smooth concatenation. Applications to hydrogen–helium plasmas in the sun including estimates for the isentropic EOS are discussed.