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P: Fachverband Plasmaphysik

P 3: Plasma Wall Interactions I / Astrophysical Plasmas

P 3.7: Vortrag

Montag, 5. März 2018, 15:30–15:45, A 0.112

Nuclear reactions in laser-generated plasmas and their applications in astrophysics — •Yuanbin Wu — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany

Plasma screening is a general feature of nuclear reactions in astrophysical environments. We have recently theoretically demonstrated that it is possible to determine the plasma screening enhancement factor in the weak-screening regime for fusion reactions with an experimental setup envisaged at the upcoming ELI-NP facility where two laser beams generate two colliding plasmas [1].

In order to have a more similar condition to the astrophysical environments, we analyse here thermonuclear reactions in a single laser-generated plasma. Studies have shown that it is possible to isochorically heat targets at solid-state density to temperatures of a few hundred eV or even a few keV [2,3]. With this solid-state density plasma, we show that direct measurements of reaction rates in plasmas of astrophysical interest are possible under the conditions of strong-screening regime. Furthermore, neutrons produced from thermonuclear reactions in such plasmas have a very narrow energy spectrum which would have both astrophysical and industrial applications.

[1] Y. Wu and A. Pálffy, Astrophys.J. 838, 55 (2017).

[2] Y. Sentoku et al., Phys. Plasmas 14, 122701 (2007).

[3] Y. Wu, J. Gunst, C.H. Keitel, and A. Pálffy, arXiv: 1708.04826.