Main-ion intrinsic toroidal rotation profile driven by residual stress torque from ion temperature gradient turbulence in the DIII-D tokamak
Abstract
Intrinsic toroidal rotation of the deuterium main-ions in the core of the DIII-D tokamak is observed to transition from at to hollow, forming an off-axis peak, above a threshold level of direct electron heating. Nonlinear gyrokinetic simulations show that the residual stress associated with electrostatic ITG turbulence possesses the correct radial location and stress structure to cause the observed hollow rotation profile. Residual stress momentum flux in the gyrokinetic simulations is balanced by turbulent momentum diffusion, with negligible contributions from turbulent pinch. Prediction of the velocity profile by integrating the momentum balance equation produces a rotation profile that qualitatively and quantitatively agrees with the measured main-ion profile, demonstrating that fluctuation-induced residual stress can drive the observed intrinsic velocity profile.
- Authors:
-
- Princeton Univ., NJ (United States). Princeton Plasma Physics Lab.
- General Atomics, San Diego, CA (United States)
- Univ. of California, San Diego, CA (United States). Center for Energy Research
- Publication Date:
- Research Org.:
- Princeton Univ., NJ (United States); General Atomics, San Diego, CA (United States); Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Nuclear Energy (NE)
- OSTI Identifier:
- 1343410
- Alternate Identifier(s):
- OSTI ID: 1338653; OSTI ID: 1347148; OSTI ID: 1374809
- Grant/Contract Number:
- AC02-09CH11466; FC02-04ER54698; FG02-07ER54917
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 118; Journal Issue: 1; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Grierson, B. A., Wang, W. X., Ethier, S., Staebler, G. M., Battaglia, D. J., Boedo, J. A., deGrassie, J. S., and Solomon, W. M. Main-ion intrinsic toroidal rotation profile driven by residual stress torque from ion temperature gradient turbulence in the DIII-D tokamak. United States: N. p., 2017.
Web. doi:10.1103/PhysRevLett.118.015002.
Grierson, B. A., Wang, W. X., Ethier, S., Staebler, G. M., Battaglia, D. J., Boedo, J. A., deGrassie, J. S., & Solomon, W. M. Main-ion intrinsic toroidal rotation profile driven by residual stress torque from ion temperature gradient turbulence in the DIII-D tokamak. United States. https://doi.org/10.1103/PhysRevLett.118.015002
Grierson, B. A., Wang, W. X., Ethier, S., Staebler, G. M., Battaglia, D. J., Boedo, J. A., deGrassie, J. S., and Solomon, W. M. Fri .
"Main-ion intrinsic toroidal rotation profile driven by residual stress torque from ion temperature gradient turbulence in the DIII-D tokamak". United States. https://doi.org/10.1103/PhysRevLett.118.015002. https://www.osti.gov/servlets/purl/1343410.
@article{osti_1343410,
title = {Main-ion intrinsic toroidal rotation profile driven by residual stress torque from ion temperature gradient turbulence in the DIII-D tokamak},
author = {Grierson, B. A. and Wang, W. X. and Ethier, S. and Staebler, G. M. and Battaglia, D. J. and Boedo, J. A. and deGrassie, J. S. and Solomon, W. M.},
abstractNote = {Intrinsic toroidal rotation of the deuterium main-ions in the core of the DIII-D tokamak is observed to transition from at to hollow, forming an off-axis peak, above a threshold level of direct electron heating. Nonlinear gyrokinetic simulations show that the residual stress associated with electrostatic ITG turbulence possesses the correct radial location and stress structure to cause the observed hollow rotation profile. Residual stress momentum flux in the gyrokinetic simulations is balanced by turbulent momentum diffusion, with negligible contributions from turbulent pinch. Prediction of the velocity profile by integrating the momentum balance equation produces a rotation profile that qualitatively and quantitatively agrees with the measured main-ion profile, demonstrating that fluctuation-induced residual stress can drive the observed intrinsic velocity profile.},
doi = {10.1103/PhysRevLett.118.015002},
journal = {Physical Review Letters},
number = 1,
volume = 118,
place = {United States},
year = {Fri Jan 06 00:00:00 EST 2017},
month = {Fri Jan 06 00:00:00 EST 2017}
}
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Works referencing / citing this record:
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