Kiel 2011 – scientific programme

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P: Fachverband Plasmaphysik

P 10: Poster: Astro- und geophysikalische Plasmen, warme dichte Plasmen

P 10.1: Poster

Tuesday, March 29, 2011, 17:00–19:00, Foyer

Influence of Nuclear Fusion on the Plasma of the Solar Core — •Michael Endres, Claudia-Veronika Meister, and Dieter Heinz Hermann Hoffmann — Institut für Kernphysik, TU Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany

The equation of state of the nonideal plasma mixture of the solar core is investigated applying the virial expansion method in density order 5/2. Thereat the quantum virial function describing Heisenberg quantum effects and quantum-physical exchange phenomena has been evaluated in third order with respect to the Born parameter for a mixture of electrons, protons and helium nuclei. Thus the pressure due to coulomb interaction in warm dense matter is calculated. Above all, the energy production in the solar core by the proton-proton fusion process is analysed. The temporal variations of the free energy and the pressure of the solar core by fusion are studied for some millions of years. There, within the frame of a first approximation, heat and radiation transport between the inner solar layers are neglected. It is shown that the changes of the solar pressure by nuclear fusion during 500.000 years, obtained within the frame of the present approximations, should be resolvable by recent helioseismology.