Growth and propagation of self-generated magnetic dipole vortices in collisionless shocks produced by interpenetrating plasmas

Naseri, N.; Bochkarev, S. G.; Ruan, P.; Bychenkov, V. Yu.; Khudik, V.; Shvets, G.

doi:10.1063/1.5008278

Title: Growth and propagation of self-generated magnetic dipole vortices in collisionless shocks produced by interpenetrating plasmas

Journal Article · Mon Jan 22 00:00:00 EST 2018 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5008278· OSTI ID:1514860

Naseri, N. ^[1]; Bochkarev, S. G. ^[2]; Ruan, P. ^[3];

^[2];

^[3]; Shvets, G. ^[4]

Univ. of Texas, Austin, TX (United States). Inst. for Fusion Studies and Dept. of Physics
P.N. Lebedev Physics Inst., Moscow (Russia); Dukhov Research Inst. of Automatics, Moscow, Russia). All-Russia Research Inst. of Automatics (VNIIA)
Univ. of Texas, Austin, TX (United States). Inst. for Fusion Studies and Dept. of Physics; Cornell Univ., Ithaca, NY (United States). School of Applied and Engineering Physics
Cornell Univ., Ithaca, NY (United States). School of Applied and Engineering Physics

Collisionless shocks generated by colliding relativistic plasmas are studied using particle-in-cell (PIC) simulations. The shock is produced due to the Weibel instabilities that generate current and density filaments and small-scale magnetic fields that are amplified from initial fluctuations. Localized regions of the strong magnetic field in the form of magnetic dipole vortices upstream of the shock are observed in the simulation developed during the nonlinear evolution of the electron and ion filaments. The vortices developing from the merger and subsequent pinching of the small-scale filaments are shown to be moving in the direction opposite to that of the shock. Lastly, we also found an analytical estimate of the drift velocity of the vortices that are confirmed by the PIC simulations.

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Research Organization:: Univ. of Texas, Austin, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0007889

OSTI ID:: 1514860

Alternate ID(s):: OSTI ID: 1417706

Journal Information:: Physics of Plasmas, Vol. 25, Issue 1; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 14 works

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