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On the Influence of the Ionization-Recombination Processes on Hydrogen Plasma Polytropic Index

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arxiv 2008.03565 v2 pith:W2TGSFJM submitted 2020-08-08 astro-ph.SR

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keywords hydrogenplasmapolytropicindexcalculatedfunctionpuretemperature
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The polytropic (adiabatic) index for pure hydrogen plasma is analytically calculated as function of reciprocal temperature and degree of ionization. Additionally, the polytropic index is graphically represented as a function of temperature and density. It is concluded that the partially ionized hydrogen plasma cannot be exactly polytropic. The calculated deviations from the mono-atomic value 5/3 are measurable. The analytical result for pure hydrogen plasma is a test example how this approach can be extended for arbitrary gas cocktail.

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  1. On the Theory of Bulk Viscosity of Cold Plasmas and Thermodynamics of Alkali-Noble Gas Cocktails

    physics.plasm-ph 2025-11 conditional novelty 7.0 of 10

    For cold plasmas, the frequency-dependent bulk viscosity follows the Mandelstam-Leontovich/Drude form with high accuracy, and can exceed shear viscosity by orders of magnitude.

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