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

Abstract

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.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [3];  [4]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of New Mexico, Albuquerque, NM (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Voss Scientific, Albuquerque, NM (United States)
  4. Univ. of New Mexico, Albuquerque, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1482948
Alternate Identifier(s):
OSTI ID: 1480159
Report Number(s):
LA-UR-18-24240
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:  
89233218CNA000001; AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 121; Journal Issue: 18; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Shocks, Plasma Shock

Citation Formats

Langendorf, Samuel J., Yates, Kevin Colligan, Hsu, Scott C., Thoma, Carsten, and Gilmore, Mark Allen. Experimental Measurements of Ion Heating in Collisional Plasma Shocks and Interpenetrating Supersonic Plasma Flows. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.121.185001.
Langendorf, Samuel J., Yates, Kevin Colligan, Hsu, Scott C., Thoma, Carsten, & Gilmore, Mark Allen. Experimental Measurements of Ion Heating in Collisional Plasma Shocks and Interpenetrating Supersonic Plasma Flows. United States. doi:10.1103/PhysRevLett.121.185001.
Langendorf, Samuel J., Yates, Kevin Colligan, Hsu, Scott C., Thoma, Carsten, and Gilmore, Mark Allen. Wed . "Experimental Measurements of Ion Heating in Collisional Plasma Shocks and Interpenetrating Supersonic Plasma Flows". United States. doi:10.1103/PhysRevLett.121.185001.
@article{osti_1482948,
title = {Experimental Measurements of Ion Heating in Collisional Plasma Shocks and Interpenetrating Supersonic Plasma Flows},
author = {Langendorf, Samuel J. and Yates, Kevin Colligan and Hsu, Scott C. and Thoma, Carsten and Gilmore, Mark Allen},
abstractNote = {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 Ti is consistent with the predictions of collisional plasma-shock theory showing a substantial elevation of Ti above the electron temperature Te and also the subsequent decrease of Ti 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 Ti is still appreciable and greater than Te but much lower than that predicted by collisional plasma-shock theory. Experimental results are compared with multifluid plasma simulations.},
doi = {10.1103/PhysRevLett.121.185001},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 18,
volume = 121,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
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