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Mildly relativistic collisionless shock formed by magnetic piston
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SYSNO ASEP 0537534 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Mildly relativistic collisionless shock formed by magnetic piston Author(s) Moreno-Gelos, Quentin (FZU-D) ORCID
Araudo, Anabella Teresa (FZU-D) ORCID
Korneev, Ph. (RU)
Li, C.K. (US)
Tikhonchuk, Vladimir (FZU-D) ORCID
Ribeyre, X. (FR)
d'Humieres, E. (FR)
Weber, Stefan A. (FZU-D) RID, ORCIDNumber of authors 8 Article number 122106 Source Title Physics of Plasmas - ISSN 1070-664X
Roč. 27, č. 12 (2020), s. 1-13Number of pages 13 s. Language eng - English Country US - United States Keywords astrophysics ; collisionless shock ; Weibel instability ; turbulence ; kinetic simulations Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects GA20-19854S GA ČR - Czech Science Foundation (CSF) EF16_019/0000789 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF15_003/0000449 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000600206900003 EID SCOPUS 85099641782 DOI https://doi.org/10.1063/1.5144683 Annotation By using particle-in-cell simulations, we study the collision of two plasma flows with one of them carrying a magnetic field. Ion interpenetration results in the formation of a magnetic piston with the magnetic field compression proportional to the density ratio of the colliding plasmas. The counterpropagating ions in the nonmagnetized plasma upstream from the piston excite the ion Weibel instability, which turns into magnetic turbulence. The thickness of the piston increases with time, and it turns into a reverse magnetized shock after less than one ion gyro period. In front of the piston, the time needed to decrease the nonmagnetized ion anisotropy using the magnetic turbulence is much larger than the ion gyroperiod in the piston. Consequently, particles are reflected by the piston, which acts as a wall initiating a transient phase. After several ion periods, the formation of this electromagnetic forward shock is, then, accelerated by the piston, and at large timescale.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2021 Electronic address https://doi.org/10.1063/1.5144683
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