Population Mixing in Asymmetric Magnetic Reconnection with a Guide Field

Hesse, M.; Chen, L.  J.; Liu, Y. -H.; Bessho, N.; Burch, J.  L.

doi:10.1103/physrevlett.118.145101

Title: Population Mixing in Asymmetric Magnetic Reconnection with a Guide Field

Journal Article · Mon Apr 03 00:00:00 EDT 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.118.145101· OSTI ID:1536491

Hesse, M. ^[1]; Chen, L. J. ^[1]; Liu, Y. -H. ^[1]; Bessho, N. ^[1]; Burch, J. L. ^[2]

NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States). Heliophysics Science Division
Southwest Research Institute, San Antonio, TX (United States)

We investigate how population mixing leads to structured electron distribution functions in asymmetric guide-field magnetic reconnection based on particle-in-cell simulations. The change of magnetic connectivity patches populations from different inflow regions to form multicomponent distributions in the exhaust, illustrating the direct consequence of the breaking and rejoining of magnetic flux tubes. Finite Larmor radius (FLR) effects of electrons accelerated by the perpendicular electric fields result in crescent-type nongyrotropic distributions. A new type of nongyrotropy is found to be caused by the combined effects of the FLR and velocity dispersion of electrons accelerated by the parallel electric field. The patching together of populations and the effects of acceleration and the FLR form the first steps of mixing in the exhaust and separatrix regions.

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Research Organization:: Univ. of Maryland, College Park, MD (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: SC0016278; DESC0016278

OSTI ID:: 1536491

Alternate ID(s):: OSTI ID: 1349706

Journal Information:: Physical Review Letters, Vol. 118, Issue 14; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 11 works

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Cited By (3)

Structure of Electron‐Scale Plasma Mixing Along the Dayside Reconnection Separatrix Holmes, J. C.; Ergun, R. E.; Nakamura, R. Journal of Geophysical Research: Space Physics, Vol. 124, Issue 11 https://doi.org/10.1029/2019ja026974	journal	November 2019
Effects of the guide field on electron distribution functions in the diffusion region of asymmetric reconnection Bessho, N.; Chen, L. -J.; Wang, S. Physics of Plasmas, Vol. 26, Issue 8 https://doi.org/10.1063/1.5092809	journal	August 2019
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