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Title: Spectral Energy Transfer and Dissipation of Magnetic Energy from Fluid to Kinetic Scales

Abstract

We investigate the magnetic energy transfer from the fluid to kinetic scales and dissipation processes using three-dimensional fully kinetic particle-in-cell plasma simulations. The nonlinear evolution of a sheet pinch is studied where we show that it exhibits both fluid scale global relaxation and kinetic scale collisionless reconnection at multiple resonant surfaces. The interactions among collisionless tearing modes destroy the original flux surfaces and produce stochastic fields, along with generating sheets and filaments of intensified currents. In addition, the magnetic energy is transferred from the original shear length scale both to the large scales due to the global relaxation and to the smaller, kinetic scales for dissipation. The dissipation is dominated by the thermal or pressure effect in the generalized Ohm's law, and electrons are preferentially accelerated.

Authors:
 [1];  [2]
  1. Plasma Physics (X-1), Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  2. Theoretical Astrophysics (T-6), Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Publication Date:
OSTI Identifier:
20861622
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevLett.98.035002; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTRONS; ENERGY TRANSFER; MAGNETIC SURFACES; MATHEMATICAL EVOLUTION; NONLINEAR PROBLEMS; OHM LAW; PLASMA SIMULATION; RELAXATION; TEARING INSTABILITY; THREE-DIMENSIONAL CALCULATIONS

Citation Formats

Bowers, K., and Li, H. Spectral Energy Transfer and Dissipation of Magnetic Energy from Fluid to Kinetic Scales. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.035002.
Bowers, K., & Li, H. Spectral Energy Transfer and Dissipation of Magnetic Energy from Fluid to Kinetic Scales. United States. doi:10.1103/PHYSREVLETT.98.035002.
Bowers, K., and Li, H. Fri . "Spectral Energy Transfer and Dissipation of Magnetic Energy from Fluid to Kinetic Scales". United States. doi:10.1103/PHYSREVLETT.98.035002.
@article{osti_20861622,
title = {Spectral Energy Transfer and Dissipation of Magnetic Energy from Fluid to Kinetic Scales},
author = {Bowers, K. and Li, H.},
abstractNote = {We investigate the magnetic energy transfer from the fluid to kinetic scales and dissipation processes using three-dimensional fully kinetic particle-in-cell plasma simulations. The nonlinear evolution of a sheet pinch is studied where we show that it exhibits both fluid scale global relaxation and kinetic scale collisionless reconnection at multiple resonant surfaces. The interactions among collisionless tearing modes destroy the original flux surfaces and produce stochastic fields, along with generating sheets and filaments of intensified currents. In addition, the magnetic energy is transferred from the original shear length scale both to the large scales due to the global relaxation and to the smaller, kinetic scales for dissipation. The dissipation is dominated by the thermal or pressure effect in the generalized Ohm's law, and electrons are preferentially accelerated.},
doi = {10.1103/PHYSREVLETT.98.035002},
journal = {Physical Review Letters},
number = 3,
volume = 98,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}