Transport of kJ-laser-driven relativistic electron beams in cold and shock-heated vitreous carbon and diamond
Open Access
- 1 March 2020
- journal article
- research article
- Published by IOP Publishing in New Journal of Physics
- Vol. 22 (3), 033031
- https://doi.org/10.1088/1367-2630/ab7a06
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.Keywords
Funding Information
- University of California Office of the President Lab fee (LFR-17-449059)
- National Laser Users’ Facility (DE-NA0002728)
- Department of Energy, National Nuclear Security Administration (DE-NA0003842)
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