Transport of kJ-laser-driven relativistic electron beams in cold and shock-heated vitreous carbon and diamond

Bailly-Grandvaux, M and Kim, J and Krauland, C M and Zhang, S and Dozières, M and Wei, M S and Theobald, W and Grabowski, P E and Santos, J J and Nicolai, Ph and McKenna, P and Desjarlais, M P and Beg, F N (2020) Transport of kJ-laser-driven relativistic electron beams in cold and shock-heated vitreous carbon and diamond. New Journal of Physics, 22 (3). 033031. ISSN 1367-2630

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    Abstract

    We report experimental results on relativistic electron beam (REB) transport in a set of cold and shock-heated carbon samples using the high-intensity kilojoule-class OMEGA EP laser. The REB energy distribution and transport were diagnosed using an electron spectrometer and x-ray fluorescence measurements from a Cu tracer buried at the rear side of the samples. The measured rear REB density shows brighter and narrower signals when the targets were shock-heated. Hybrid PIC simulations using advanced resistivity models in the target warm-dense-matter (WDM) conditions confirm this observation. We show that the resistivity response of the media, which governs the self-generated resistive fields, is of paramount importance to understand and correctly predict the REB transport.

    ORCID iDs

    Bailly-Grandvaux, M, Kim, J, Krauland, C M, Zhang, S, Dozières, M, Wei, M S, Theobald, W, Grabowski, P E, Santos, J J, Nicolai, Ph, McKenna, P ORCID logoORCID: https://orcid.org/0000-0001-8061-7091, Desjarlais, M P and Beg, F N;