Thermal transport dynamics in the quasi-single helicity state

McKinney, I. J.; Terry, P. W.

doi:10.1063/1.4985317

Title: Thermal transport dynamics in the quasi-single helicity state

Journal Article · Tue Jun 13 00:00:00 EDT 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4985317· OSTI ID:1466022

^[1]; Terry, P. W. ^[1]

Univ. of Wisconsin, Madison, WI (United States)

Here, a dynamical model describing oscillations between multiple and single helicity configurations in the quasi-single helicity (QSH) state of the reversed field pinch is extended to include electron temperature profile dynamics. It is shown that QSH dynamics is linked to the electron temperature profile because the suppression of mode coupling between tearing modes proposed to underlie QSH also suppresses magnetic-fluctuation-induced thermal transport. Above the threshold of dominant-mode shear that marks the transition to QSH, the model produces temperature-gradient steepening in the strong shear region. Oscillations of the dominant and secondary mode amplitudes give rise to oscillations of the temperature gradient. The phasing and amplitude of temperature gradient oscillations relative to those of the dominant mode are in agreement with experiment.

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Research Organization:: Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FG02-85ER53212

OSTI ID:: 1466022

Alternate ID(s):: OSTI ID: 1363705

Journal Information:: Physics of Plasmas, Vol. 24, Issue 6; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 1 work

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References (23)

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