Predicting the Toroidal Rotation Profile for ITER

Colin Chrystal; Brian A. Grierson; Shaun R. haskey; John S. deGrassie; Gary M. Staebler; Tuomas Tala; Antti Salmi

Abstract

Experiments on DIII-D have increased confidence in a prediction of moderate intrinsic rotation in ITER[1] by investigating the effect of fast-ions and edge neutrals in rotation studies. In a large tokamak like ITER, intrinsic sources of rotation are important because evidence suggests they will be comparable to the neutral beam torque. Measurements of the ρ* dependence of intrinsic rotation in Electron Cyclotron Heated H-modes are consistent with previous measurements of the ρ* scaling of intrinsic torque and momentum confinement in beam heated plasmas with significant fast-ion fractions, showing that fast-ions did not corrupt those results. Also, the small differences in intrinsic rotation of closed and open divertor configurations show that momentum transport due to neutrals in the pedestal is not a significant hidden variable. This result is supported by the similarity of intrinsic rotation before and after the onset of detachment.

Original language	English
Publication status	Published - 2018
MoE publication type	Not Eligible
Event	60th Annual Meeting of the APS Division of Plasma Physics - Portland, Portland, United States Duration: 5 Nov 2018 → 9 Nov 2018 Conference number: 60 https://www.aps.org/units/dpp/meetings/annual/

Conference

Conference	60th Annual Meeting of the APS Division of Plasma Physics
Country/Territory	United States
City	Portland
Period	5/11/18 → 9/11/18
Internet address	https://www.aps.org/units/dpp/meetings/annual/

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Access to Document

http://meetings.aps.org/Meeting/DPP18/Session/UP11.62

Cite this

@conference{6ddba94e5abf4c34b212fb5cf58f5228,

title = "Predicting the Toroidal Rotation Profile for ITER",

abstract = "Experiments on DIII-D have increased confidence in a prediction of moderate intrinsic rotation in ITER[1] by investigating the effect of fast-ions and edge neutrals in rotation studies. In a large tokamak like ITER, intrinsic sources of rotation are important because evidence suggests they will be comparable to the neutral beam torque. Measurements of the ρ* dependence of intrinsic rotation in Electron Cyclotron Heated H-modes are consistent with previous measurements of the ρ* scaling of intrinsic torque and momentum confinement in beam heated plasmas with significant fast-ion fractions, showing that fast-ions did not corrupt those results. Also, the small differences in intrinsic rotation of closed and open divertor configurations show that momentum transport due to neutrals in the pedestal is not a significant hidden variable. This result is supported by the similarity of intrinsic rotation before and after the onset of detachment.",

author = "Colin Chrystal and Grierson, {Brian A.} and haskey, {Shaun R.} and deGrassie, {John S.} and Staebler, {Gary M.} and Tuomas Tala and Antti Salmi",

note = "Poster presentation; 60th Annual Meeting of the APS Division of Plasma Physics ; Conference date: 05-11-2018 Through 09-11-2018",

year = "2018",

language = "English",

url = "https://www.aps.org/units/dpp/meetings/annual/",

}

TY - CONF

T1 - Predicting the Toroidal Rotation Profile for ITER

AU - Chrystal, Colin

AU - Grierson, Brian A.

AU - haskey, Shaun R.

AU - deGrassie, John S.

AU - Staebler, Gary M.

AU - Tala, Tuomas

AU - Salmi, Antti

N1 - Conference code: 60

PY - 2018

Y1 - 2018

N2 - Experiments on DIII-D have increased confidence in a prediction of moderate intrinsic rotation in ITER[1] by investigating the effect of fast-ions and edge neutrals in rotation studies. In a large tokamak like ITER, intrinsic sources of rotation are important because evidence suggests they will be comparable to the neutral beam torque. Measurements of the ρ* dependence of intrinsic rotation in Electron Cyclotron Heated H-modes are consistent with previous measurements of the ρ* scaling of intrinsic torque and momentum confinement in beam heated plasmas with significant fast-ion fractions, showing that fast-ions did not corrupt those results. Also, the small differences in intrinsic rotation of closed and open divertor configurations show that momentum transport due to neutrals in the pedestal is not a significant hidden variable. This result is supported by the similarity of intrinsic rotation before and after the onset of detachment.

AB - Experiments on DIII-D have increased confidence in a prediction of moderate intrinsic rotation in ITER[1] by investigating the effect of fast-ions and edge neutrals in rotation studies. In a large tokamak like ITER, intrinsic sources of rotation are important because evidence suggests they will be comparable to the neutral beam torque. Measurements of the ρ* dependence of intrinsic rotation in Electron Cyclotron Heated H-modes are consistent with previous measurements of the ρ* scaling of intrinsic torque and momentum confinement in beam heated plasmas with significant fast-ion fractions, showing that fast-ions did not corrupt those results. Also, the small differences in intrinsic rotation of closed and open divertor configurations show that momentum transport due to neutrals in the pedestal is not a significant hidden variable. This result is supported by the similarity of intrinsic rotation before and after the onset of detachment.

M3 - Conference Abstract

T2 - 60th Annual Meeting of the APS Division of Plasma Physics

Y2 - 5 November 2018 through 9 November 2018

ER -