Experimental Measurements of Ion Heating in Collisional Plasma Shocks and Interpenetrating Supersonic Plasma Flows

Langendorf, Samuel J.; Yates, Kevin Colligan; Hsu, Scott C.; Thoma, Carsten; Gilmore, Mark Allen

doi:10.1103/PhysRevLett.121.185001

Title: Experimental Measurements of Ion Heating in Collisional Plasma Shocks and Interpenetrating Supersonic Plasma Flows

Journal Article · Wed Oct 31 00:00:00 EDT 2018 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.121.185001· OSTI ID:1482948

^[1];

^[2];

^[1]; Thoma, Carsten ^[3]; Gilmore, Mark Allen ^[4]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of New Mexico, Albuquerque, NM (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Voss Scientific, Albuquerque, NM (United States)
Univ. of New Mexico, Albuquerque, NM (United States)

Here, we present time-resolved measurements of ion heating due to collisional plasma shocks and interpenetrating supersonic plasma flows, which are formed by the oblique merging of two coaxial-gun-formed plasma jets. Our study is repeated using four jet species: N, Ar, Kr, and Xe. In conditions with small interpenetration between jets, the observed peak ion temperature T_i is consistent with the predictions of collisional plasma-shock theory showing a substantial elevation of T_i above the electron temperature T_e and also the subsequent decrease of T_i on the classical ion-electron temperature-equilibration timescale. In conditions of significant interpenetration between jets, such that shocks do not apparently form, the observed peak T_i is still appreciable and greater than T_e but much lower than that predicted by collisional plasma-shock theory. Experimental results are compared with multifluid plasma simulations.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

Grant/Contract Number:: 89233218CNA000001; AC52-06NA25396

OSTI ID:: 1482948

Alternate ID(s):: OSTI ID: 1480159

Report Number(s):: LA-UR-18-24240; PRLTAO

Journal Information:: Physical Review Letters, Vol. 121, Issue 18; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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Hybrid particle-in-cell simulations of laser-driven plasma interpenetration, heating, and entrainment Higginson, D. P.; Amendt, P.; Meezan, N. Physics of Plasmas, Vol. 26, Issue 11 https://doi.org/10.1063/1.5110512	journal	November 2019
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