Electron energization during merging of self-magnetized, high-beta, laser-produced plasmas

Fiksel, G.; Fox, W.; Rosenberg, M. J.; Schaeffer, D. B.; Matteucci, J.; Bhattacharjee, A.

doi:10.1017/S0022377821000787

Title: Electron energization during merging of self-magnetized, high-beta, laser-produced plasmas

Journal Article · 05 August 2021 · Journal of Plasma Physics

DOI: https://doi.org/10.1017/S0022377821000787 · OSTI ID:1870340

; Fox, W.; Rosenberg, M. J.; Schaeffer, D. B.; Matteucci, J.; Bhattacharjee, A.

Electron energization during merging of magnetized plasmas is studied using the OMEGA and OMEGA EP laser facilities by colliding two plasma plumes, each containing a Biermann-battery self-generated magnetic field. Two neighbouring plasma plumes are produced by intense laser beams, and the anti-parallel Biermann fields merge and reconnect in the process of the plumes’ expansion and collision. To isolate the merging as an acceleration source, the electron energy spectra obtained from two-plume collision shots are compared with the spectra from single-plume shots. Single-plume shots exhibit an energized electron tail with energies up to $${\sim }250\ \textrm {keV}$$ . The electrons in merging experiments are additionally accelerated by $${\sim }50\text {--}100$$ keV compared to single-plume shots.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: NA0003856; SC0020005

OSTI ID:: 1870340

Journal Information:: Journal of Plasma Physics, Journal Name: Journal of Plasma Physics Journal Issue: 4 Vol. 87; ISSN 0022-3778

Publisher:: Cambridge University Press (CUP)Copyright Statement

Country of Publication:: United Kingdom

Language:: English

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