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Title: Highly Resolved Measurements of a Developing Strong Collisional Plasma Shock

Abstract

In this paper, the structure of a strong collisional shock front forming in a plasma is directly probed for the first time in laser-driven gas-jet experiments. Thomson scattering of a 526.5 nm probe beam was used to diagnose temperature and ion velocity distribution in a strong shock ($$M{\sim}11$$) propagating through a low-density ($${\rho}{\sim}0.01\text{ }\text{ }\mathrm{mg}/\mathrm{cc}$$) plasma composed of hydrogen. A forward-streaming population of ions traveling in excess of the shock velocity was observed to heat and slow down on an unmoving, unshocked population of cold protons, until ultimately the populations merge and begin to thermalize. Finally, instabilities are observed during the merging, indicating a uniquely plasma-phase process in shock front formation.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [2];  [3];  [3];  [3];  [3]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
LLNL Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1438627
Alternate Identifier(s):
OSTI ID: 1423500; OSTI ID: 1466160
Report Number(s):
LLNL-JRNL-741313; LLNL-JRNL-755398
Journal ID: ISSN 0031-9007; TRN: US1900472
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 9; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; high-energy-density plasmas; kinetic theory; plasma instabilities; shock waves & discontinuities in plasma; Lasers

Citation Formats

Rinderknecht, Hans G., Park, H. -S., Ross, J. S., Amendt, P. A., Higginson, D. P., Wilks, S. C., Haberberger, D., Katz, J., Froula, D. H., Hoffman, N. M., Kagan, G., Keenan, B. D., and Vold, E. L. Highly Resolved Measurements of a Developing Strong Collisional Plasma Shock. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.120.095001.
Rinderknecht, Hans G., Park, H. -S., Ross, J. S., Amendt, P. A., Higginson, D. P., Wilks, S. C., Haberberger, D., Katz, J., Froula, D. H., Hoffman, N. M., Kagan, G., Keenan, B. D., & Vold, E. L. Highly Resolved Measurements of a Developing Strong Collisional Plasma Shock. United States. doi:10.1103/PhysRevLett.120.095001.
Rinderknecht, Hans G., Park, H. -S., Ross, J. S., Amendt, P. A., Higginson, D. P., Wilks, S. C., Haberberger, D., Katz, J., Froula, D. H., Hoffman, N. M., Kagan, G., Keenan, B. D., and Vold, E. L. Fri . "Highly Resolved Measurements of a Developing Strong Collisional Plasma Shock". United States. doi:10.1103/PhysRevLett.120.095001. https://www.osti.gov/servlets/purl/1438627.
@article{osti_1438627,
title = {Highly Resolved Measurements of a Developing Strong Collisional Plasma Shock},
author = {Rinderknecht, Hans G. and Park, H. -S. and Ross, J. S. and Amendt, P. A. and Higginson, D. P. and Wilks, S. C. and Haberberger, D. and Katz, J. and Froula, D. H. and Hoffman, N. M. and Kagan, G. and Keenan, B. D. and Vold, E. L.},
abstractNote = {In this paper, the structure of a strong collisional shock front forming in a plasma is directly probed for the first time in laser-driven gas-jet experiments. Thomson scattering of a 526.5 nm probe beam was used to diagnose temperature and ion velocity distribution in a strong shock ($M{\sim}11$) propagating through a low-density (${\rho}{\sim}0.01\text{ }\text{ }\mathrm{mg}/\mathrm{cc}$) plasma composed of hydrogen. A forward-streaming population of ions traveling in excess of the shock velocity was observed to heat and slow down on an unmoving, unshocked population of cold protons, until ultimately the populations merge and begin to thermalize. Finally, instabilities are observed during the merging, indicating a uniquely plasma-phase process in shock front formation.},
doi = {10.1103/PhysRevLett.120.095001},
journal = {Physical Review Letters},
number = 9,
volume = 120,
place = {United States},
year = {2018},
month = {3}
}

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