Conversion of Magnetic Energy to Plasma Kinetic Energy During Guide Field Magnetic Reconnection in the Laboratory

Bose, Sayak; Fox, William R.; Ji, Hantao; Yoo, Jongsoo; Goodman, Aaron; Alt, Andrew; Yamada, Masaaki

doi:10.1103/physrevlett.132.205102

Conversion of Magnetic Energy to Plasma Kinetic Energy During Guide Field Magnetic Reconnection in the Laboratory

Journal Article · Wed May 15 00:00:00 EDT 2024 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.132.205102· OSTI ID:2352440

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Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); Princeton Univ., NJ (United States)
Princeton Univ., NJ (United States)

Here, we present laboratory measurements showing the two-dimensional (2D) structure of energy conversion during magnetic reconnection with a guide field over the electron and ion diffusion regions, resolving the separate energy deposition on electrons and ions. We find that the electrons are energized by the parallel electric field at two locations, at the X line and around the separatrices. On the other hand, the ions are energized ballistically by the perpendicular electric field in the vicinity of the high-density separatrices. An energy balance calculation by evaluating the terms of the Poynting theorem shows that 40% of the magnetic energy is converted to particle energy, 2/3 of which is transferred to ions and 1/3 to electrons. Further analysis suggests that the energy deposited on particles manifests mostly in the form of thermal kinetic energy in the diffusion regions.

View Accepted Manuscript (DOE)

Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE; National Aeronautics and Space Administration (NASA)

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 2352440

Alternate ID(s):: OSTI ID: 2356914

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 20 Vol. 132; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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