skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Magnetic field production via the Weibel instability in interpenetrating plasma flows

Abstract

Here, many astrophysical systems are effectively “collisionless,” that is, the mean free path for collisions between particles is much longer than the size of the system. The absence of particle collisions does not preclude shock formation, however, as shocks can be the result of plasma instabilities that generate and amplify electromagnetic fields. The magnetic fields required for shock formation may either be initially present, for example, in supernova remnants or young galaxies, or they may be self-generated in systems such as gamma-ray bursts (GRBs). In the case of GRB outflows, the Weibel instability is a candidate mechanism for the generation of sufficiently strong magnetic fields to produce shocks. In experiments on the OMEGA Laser, we have demonstrated a quasi-collisionless system that is optimized for the study of the non-linear phase of Weibel instability growth. Using a proton probe to directly image electromagnetic fields, we measure Weibel-generated magnetic fields that grow in opposing, initially unmagnetized plasma flows. The collisionality of the system is determined from coherent Thomson scattering measurements, and the data are compared to similar measurements of a fully collisionless system. The strong, persistent Weibel growth observed here serves as a diagnostic for exploring large-scale magnetic field amplification and themore » microphysics present in the collisional–collisionless transition.« less

Authors:
ORCiD logo [1];  [2];  [1];  [1];  [3]; ORCiD logo [1];  [1];  [4]; ORCiD logo [1];  [5];  [1]; ORCiD logo [1];  [1];  [3]; ORCiD logo [6];  [7];  [5]; ORCiD logo [1]; ORCiD logo [6]; ORCiD logo [8]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Michigan, Ann Arbor, MI (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Univ. of Oxford, Oxford (United Kingdom)
  5. Princeton Univ., Princeton, NJ (United States)
  6. Osaka Univ., Osaka (Japan)
  7. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  8. 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.:
USDOE
OSTI Identifier:
1357407
Alternate Identifier(s):
OSTI ID: 1361845
Report Number(s):
LLNL-PROC-717204
Journal ID: ISSN 1070-664X; PHPAEN
Grant/Contract Number:  
AC52-07NA27344; 15-ERD-065
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 4; Conference: High Energy Density Laboratory Astrophysics, Palo Alto, CA (United States), 16-21 May 2016; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 70 PLASMA PHYSICS AND FUSION

Citation Formats

Huntington, C. M., Manuel, M. J. -E., Ross, J. S., Wilks, S. C., Fiuza, F., Rinderknecht, H. G., Park, H. -S., Gregori, G., Higginson, D. P., Park, J., Pollock, B. B., Remington, B. A., Ryutov, D. D., Ruyer, C., Sakawa, Y., Sio, H., Spitkovsky, A., Swadling, G. F., Takabe, H., and Zylstra, A. B. Magnetic field production via the Weibel instability in interpenetrating plasma flows. United States: N. p., 2017. Web. doi:10.1063/1.4982044.
Huntington, C. M., Manuel, M. J. -E., Ross, J. S., Wilks, S. C., Fiuza, F., Rinderknecht, H. G., Park, H. -S., Gregori, G., Higginson, D. P., Park, J., Pollock, B. B., Remington, B. A., Ryutov, D. D., Ruyer, C., Sakawa, Y., Sio, H., Spitkovsky, A., Swadling, G. F., Takabe, H., & Zylstra, A. B. Magnetic field production via the Weibel instability in interpenetrating plasma flows. United States. doi:10.1063/1.4982044.
Huntington, C. M., Manuel, M. J. -E., Ross, J. S., Wilks, S. C., Fiuza, F., Rinderknecht, H. G., Park, H. -S., Gregori, G., Higginson, D. P., Park, J., Pollock, B. B., Remington, B. A., Ryutov, D. D., Ruyer, C., Sakawa, Y., Sio, H., Spitkovsky, A., Swadling, G. F., Takabe, H., and Zylstra, A. B. Wed . "Magnetic field production via the Weibel instability in interpenetrating plasma flows". United States. doi:10.1063/1.4982044. https://www.osti.gov/servlets/purl/1357407.
@article{osti_1357407,
title = {Magnetic field production via the Weibel instability in interpenetrating plasma flows},
author = {Huntington, C. M. and Manuel, M. J. -E. and Ross, J. S. and Wilks, S. C. and Fiuza, F. and Rinderknecht, H. G. and Park, H. -S. and Gregori, G. and Higginson, D. P. and Park, J. and Pollock, B. B. and Remington, B. A. and Ryutov, D. D. and Ruyer, C. and Sakawa, Y. and Sio, H. and Spitkovsky, A. and Swadling, G. F. and Takabe, H. and Zylstra, A. B.},
abstractNote = {Here, many astrophysical systems are effectively “collisionless,” that is, the mean free path for collisions between particles is much longer than the size of the system. The absence of particle collisions does not preclude shock formation, however, as shocks can be the result of plasma instabilities that generate and amplify electromagnetic fields. The magnetic fields required for shock formation may either be initially present, for example, in supernova remnants or young galaxies, or they may be self-generated in systems such as gamma-ray bursts (GRBs). In the case of GRB outflows, the Weibel instability is a candidate mechanism for the generation of sufficiently strong magnetic fields to produce shocks. In experiments on the OMEGA Laser, we have demonstrated a quasi-collisionless system that is optimized for the study of the non-linear phase of Weibel instability growth. Using a proton probe to directly image electromagnetic fields, we measure Weibel-generated magnetic fields that grow in opposing, initially unmagnetized plasma flows. The collisionality of the system is determined from coherent Thomson scattering measurements, and the data are compared to similar measurements of a fully collisionless system. The strong, persistent Weibel growth observed here serves as a diagnostic for exploring large-scale magnetic field amplification and the microphysics present in the collisional–collisionless transition.},
doi = {10.1063/1.4982044},
journal = {Physics of Plasmas},
number = 4,
volume = 24,
place = {United States},
year = {Wed Apr 26 00:00:00 EDT 2017},
month = {Wed Apr 26 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

Save / Share: