Structure of Plasma Heating in Gyrokinetic Alfvénic Turbulence
Abstract
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.
- Authors:
-
- Univ. of California, Los Angeles, CA (United States)
- Coventry Univ. (United Kingdom)
- Univ. of California, Los Angeles, CA (United States); Max-Planck-Inst. für Plasmaphysik, Garching (Germany)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1544417
- Alternate Identifier(s):
- OSTI ID: 1334686
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 117; Journal Issue: 24; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Navarro, Alejandro Bañón, Teaca, Bogdan, Told, Daniel, Groselj, Daniel, Crandall, Paul, and Jenko, Frank. Structure of Plasma Heating in Gyrokinetic Alfvénic Turbulence. United States: N. p., 2016.
Web. doi:10.1103/PhysRevLett.117.245101.
Navarro, Alejandro Bañón, Teaca, Bogdan, Told, Daniel, Groselj, Daniel, Crandall, Paul, & Jenko, Frank. Structure of Plasma Heating in Gyrokinetic Alfvénic Turbulence. United States. https://doi.org/10.1103/PhysRevLett.117.245101
Navarro, Alejandro Bañón, Teaca, Bogdan, Told, Daniel, Groselj, Daniel, Crandall, Paul, and Jenko, Frank. Wed .
"Structure of Plasma Heating in Gyrokinetic Alfvénic Turbulence". United States. https://doi.org/10.1103/PhysRevLett.117.245101. https://www.osti.gov/servlets/purl/1544417.
@article{osti_1544417,
title = {Structure of Plasma Heating in Gyrokinetic Alfvénic Turbulence},
author = {Navarro, Alejandro Bañón and Teaca, Bogdan and Told, Daniel and Groselj, Daniel and Crandall, Paul and Jenko, Frank},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.117.245101},
journal = {Physical Review Letters},
number = 24,
volume = 117,
place = {United States},
year = {Wed Dec 07 00:00:00 EST 2016},
month = {Wed Dec 07 00:00:00 EST 2016}
}
Web of Science
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