Momentum flux parasitic to free-energy transfer

Stoltzfus-Dueck, T.; Scott, B.

doi:10.1088/1741-4326/aa7289

Title: Momentum flux parasitic to free-energy transfer

Journal Article · Thu May 11 00:00:00 EDT 2017 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/aa7289· OSTI ID:1426203

Stoltzfus-Dueck, T. ^[1]; Scott, B. ^[2]

Princeton Univ., NJ (United States)
Max-Planck-Inst. fur Plasmaphysik, Garching (Germany)

An often-neglected portion of the radial $$\boldsymbol{E}\times \boldsymbol{B}$$ drift is shown to drive an outward flux of co-current momentum when free energy is transferred from the electrostatic potential to ion parallel flows. This symmetry breaking is fully nonlinear, not quasilinear, necessitated simply by free-energy balance in parameter regimes for which significant energy is dissipated via ion parallel flows. The resulting rotation peaking is counter-current and has a scaling and order of magnitude that are comparable with experimental observations. Finally, the residual stress becomes inactive when frequencies are much higher than the ion transit frequency, which may explain the observed relation of density peaking and counter-current rotation peaking in the core.

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

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1426203

Report Number(s):: PPPL-5329; TRN: US1802264

Journal Information:: Nuclear Fusion, Vol. 57, Issue 8; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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Cited By (2)

Full- f gyrokinetic simulation of turbulence in a helical open-field-line plasma Shi, E. L.; Hammett, G. W.; Stoltzfus-Dueck, T. Physics of Plasmas, Vol. 26, Issue 1 https://doi.org/10.1063/1.5074179	journal	January 2019
Intrinsic rotation in axisymmetric devices Stoltzfus-Dueck, T. Plasma Physics and Controlled Fusion, Vol. 61, Issue 12 https://doi.org/10.1088/1361-6587/ab4376	journal	November 2019

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