Explaining Cold-Pulse Dynamics in Tokamak Plasmas Using Local Turbulent Transport Models
Name
PhysRevLett.120.075001.pdf
Size
1.53 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Grierson, B. A.
Staebler, G. M.
Yuan, X.
Creely, A. J.
Greenwald, M. J.
Rodriguez Fernandez, Pablo
White, Anne E.
Howard, Nathaniel Thomas
Cao, Norman
Creely, Alexander James
Date Issued
February 2018
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Rodriguez-Fernandez, P. et al. “Explaining Cold-Pulse Dynamics in Tokamak Plasmas Using Local Turbulent Transport Models.” Physical Review Letters 120, 7 (February 2018) © 2018 American Physical Society
Version
Final published version
Abstract
A long-standing enigma in plasma transport has been resolved by modeling of cold-pulse experiments conducted on the Alcator C-Mod tokamak. Controlled edge cooling of fusion plasmas triggers core electron heating on time scales faster than an energy confinement time, which has long been interpreted as strong evidence of nonlocal transport. This Letter shows that the steady-state profiles, the cold-pulse rise time, and disappearance at higher density as measured in these experiments are successfully captured by a recent local quasilinear turbulent transport model, demonstrating that the existence of nonlocal transport phenomena is not necessary for explaining the behavior and time scales of cold-pulse experiments in tokamak plasmas.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.120.075001
