Collisionless shock experiments with lasers and observation of Weibel instabilities
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- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); High Energy Density Physics Division, Plasma Science and Fusion Center, Massachusetts Institute of Technology
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- University of Michigan, Ann Arbor, MI (United States)
- Univ. of Rochester, NY (United States)
- Univ. of Oxford, Oxford (United Kingdom)
- LULI, Ecole Polytechnique, Palaiseau (France)
- Lam Research Corporation, Fremont, CA (United States)
- Univ. of Chicago, Chicago, CA (United States)
- MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States)
- Osaka Univ., Osaka (Japan)
- Princeton Univ., NJ (United States)
Astrophysical collisionless shocks are common in the universe, occurring in supernova remnants, gamma ray bursts, and protostellar jets. They appear in colliding plasma flows when the mean free path for ion-ion collisions is much larger than the system size. It is believed that such shocks could be mediated via the electromagnetic Weibel instability in astrophysical environments without preexisting magnetic fields. Here, we present laboratory experiments using high-power lasers and investigate the dynamics of high-Mach-number collisionless shock formation in two interpenetrating plasma streams. Our recent proton-probe experiments on Omega show the characteristic filamentary structures of the Weibel instability that are electromagnetic in nature with an inferred magnetization level as high as ~1% These results imply that electromagnetic instabilities are significant in the interaction of astrophysical conditions.
- Research Organization:
- Massachusetts Institute of Technology, Cambridge, MA (United States)
- Sponsoring Organization:
- USDOE; USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC52-07NA27344; NA0001857
- OSTI ID:
- 1182658
- Alternate ID(s):
- OSTI ID: 1227994
OSTI ID: 1228320
OSTI ID: 22410407
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 22; ISSN PHPAEN; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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