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Title: Structure of Plasma Heating in Gyrokinetic Alfvénic Turbulence

Journal Article · · Physical Review Letters
 [1];  [2];  [1];  [3];  [1];  [1]
  1. Univ. of California, Los Angeles, CA (United States)
  2. Coventry Univ. (United Kingdom)
  3. Univ. of California, Los Angeles, CA (United States); Max-Planck-Inst. für Plasmaphysik, Garching (Germany)

Here, we analyze plasma heating in weakly collisional kinetic Alfvén wave turbulence using high resolution gyrokinetic simulations spanning the range of scales between the ion and the electron gyroradii. Real space structures that have a higher than average heating rate are shown not to be confined to current sheets. This novel result is at odds with previous studies, which use the electromagnetic work in the local electron fluid frame, i.e., J∙(E+ve×B), as a proxy for turbulent dissipation to argue that heating follows the intermittent spatial structure of the electric current. Furthermore, we show that electrons are dominated by parallel heating while the ions prefer the perpendicular heating route. We comment on the implications of the results presented here.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1544417
Alternate ID(s):
OSTI ID: 1334686
Journal Information:
Physical Review Letters, Vol. 117, Issue 24; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 46 works
Citation information provided by
Web of Science

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Cited By (16)

The multi-scale nature of the solar wind journal December 2019
ViDA: a Vlasov–DArwin solver for plasma physics at electron scales journal October 2019
Fluid simulations of plasma turbulence at ion scales: Comparison with Vlasov-Maxwell simulations journal May 2018
Velocity-space cascade in magnetized plasmas: Numerical simulations journal June 2018
Thermal disequilibration of ions and electrons by collisionless plasma turbulence journal December 2018
Fourier–Hermite decomposition of the collisional Vlasov–Maxwell system: implications for the velocity-space cascade journal March 2019
Hybrid-kinetic Simulations of Ion Heating in Alfvénic Turbulence journal July 2019
A Look at Phase Space Intermittency in Magnetized Plasma Turbulence journal November 2019
Proton–Proton Collisions in the Turbulent Solar Wind: Hybrid Boltzmann–Maxwell Simulations journal December 2019
Magnetic Reconnection as a Driver for a Sub-ion-scale Cascade in Plasma Turbulence journal November 2017
Dual Phase-space Cascades in 3D Hybrid-Vlasov–Maxwell Turbulence journal March 2018
Spatially Localized Particle Energization by Landau Damping in Current Sheets Produced by Strong Alfven Wave Collisions text January 2017
Dual phase-space cascades in 3D hybrid-Vlasov-Maxwell turbulence text January 2018
Fourier-Hermite decomposition of the collisional Vlasov-Maxwell system: implications for the velocity space cascade text January 2018
Proton-proton collisions in the turbulent solar wind: Hybrid Boltzmann-Maxwell simulations text January 2019
Collisionless energy transfer in kinetic turbulence: field-particle correlations in Fourier space text January 2019

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