Explaining Cold-Pulse Dynamics in Tokamak Plasmas Using Local Turbulent Transport Models

Rodriguez-Fernandez, P.; White, A. E.; Howard, N. T.; Grierson, B. A.; Staebler, G. M.; Rice, J. E.; Yuan, X.; Cao, N. M.; Creely, A. J.; Greenwald, M. J.; Hubbard, A. E.; Hughes, J. W.; Irby, J. H.; Sciortino, F.

doi:10.1103/PhysRevLett.120.075001

Explaining Cold-Pulse Dynamics in Tokamak Plasmas Using Local Turbulent Transport Models

Journal Article · Fri Feb 16 00:00:00 EST 2018 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.120.075001· OSTI ID:1432046

Rodriguez-Fernandez, P. ^[1]; White, A. E. ^[2]; Howard, N. T. ^[2]; Grierson, B. A. ^[3]; Staebler, G. M. ^[4]; Rice, J. E. ^[2]; Yuan, X. ^[3]; Cao, N. M. ^[2]; Creely, A. J. ^[2]; Greenwald, M. J. ^[2]; Hubbard, A. E. ^[2]; Hughes, J. W. ^[2]; Irby, J. H. ^[2]; Sciortino, F. ^[2]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Cente
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
General Atomics, San Diego, CA (United States)

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. Here, 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.

View Accepted Manuscript (DOE)

Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FC02-99ER54512; SC0014264

OSTI ID:: 1432046

Alternate ID(s):: OSTI ID: 1421579
OSTI ID: 22805983

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 7 Vol. 120; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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