Role of Ion Kinetic Physics in the Interaction of Magnetic Flux Ropes
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- SciberQuest, Inc., Del Mar, CA (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
To explain many natural magnetized plasma phenomena, it is crucial to understand how rates of collisionless magnetic reconnection scale in large magnetohydrodynamic (MHD) scale systems. Simulations of isolated current sheets conclude such rates are independent of system size and can be reproduced by the Hall-MHD model, but neglect sheet formation and coupling to MHD scales. Here in this study, it is shown for the problem of flux-rope merging, which includes this formation and coupling, that the Hall-MHD model fails to reproduce the kinetic results. The minimum sufficient model must retain ion kinetic effects, which set the ion diffusion region geometry and give time-averaged rates that reduce significantly with system size, leading to different global evolution in large systems.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); National Aeronautics and Space Administration (NASA)
- Grant/Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1457252
- Alternate ID(s):
- OSTI ID: 1224134
- Report Number(s):
- LA-UR-15-25385; PRLTAO; TRN: US1901335
- Journal Information:
- Physical Review Letters, Vol. 115, Issue 17; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Simulations of anti-parallel reconnection using a nonlocal heat flux closure
|
journal | August 2017 |
Study of magnetic reconnection in large-scale magnetic island coalescence via spatially coupled MHD and PIC simulations
|
journal | August 2018 |
Plasma Energization in Colliding Magnetic Flux Ropes
|
journal | October 2018 |
Why does steady-state magnetic reconnection have a maximum local rate of order 0.1? | text | January 2016 |
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