Observation of Peak Neoclassical Toroidal Viscous Force in the DIII-D Tokamak

Cole, A. J.; Callen, J. D.; Solomon, W. M.; Garofalo, A. M.; Hegna, C. C.; Lanctot, M. J.; Reimerdes, H.

doi:10.1103/PhysRevLett.106.225002

Title: Observation of Peak Neoclassical Toroidal Viscous Force in the DIII-D Tokamak

Full Record
Other Related Research

Authors:: Cole, A. J.; Callen, J. D.; Solomon, W. M.; Garofalo, A. M.; Hegna, C. C.; Lanctot, M. J.; Reimerdes, H.; the DIII-D Team

Publication Date:: Wed Jun 01 00:00:00 EDT 2011

Sponsoring Org.:: USDOE

OSTI Identifier:: 1099504

Resource Type:: Publisher's Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 106; Journal Issue: 22; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Citation Formats


                    Cole, A. J., Callen, J. D., Solomon, W. M., Garofalo, A. M., Hegna, C. C., Lanctot, M. J., Reimerdes, H., and the DIII-D Team. Observation of Peak Neoclassical Toroidal Viscous Force in the DIII-D Tokamak.  United States: N. p., 2011. 
Web.  doi:10.1103/PhysRevLett.106.225002.

Copy to clipboard


                    Cole, A. J., Callen, J. D., Solomon, W. M., Garofalo, A. M., Hegna, C. C., Lanctot, M. J., Reimerdes, H., & the DIII-D Team. Observation of Peak Neoclassical Toroidal Viscous Force in the DIII-D Tokamak.  United States.  https://doi.org/10.1103/PhysRevLett.106.225002

Copy to clipboard


                    Cole, A. J., Callen, J. D., Solomon, W. M., Garofalo, A. M., Hegna, C. C., Lanctot, M. J., Reimerdes, H., and the DIII-D Team. Wed .  
"Observation of Peak Neoclassical Toroidal Viscous Force in the DIII-D Tokamak".  United States.  https://doi.org/10.1103/PhysRevLett.106.225002.

Copy to clipboard


                    
@article{osti_1099504,

  title        = {Observation of Peak Neoclassical Toroidal Viscous Force in the DIII-D Tokamak},

  author       = {Cole, A. J. and Callen, J. D. and Solomon, W. M. and Garofalo, A. M. and Hegna, C. C. and Lanctot, M. J. and Reimerdes, H. and the DIII-D Team},

  abstractNote = {},

  doi          = {10.1103/PhysRevLett.106.225002},

  journal      = {Physical Review Letters},

  number       = 22,

  volume       = 106,

  place        = {United States},

  year         = {Wed Jun 01 00:00:00 EDT 2011},

  month        = {Wed Jun 01 00:00:00 EDT 2011}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (Publisher)

Publisher's Version of Record
https://doi.org/10.1103/PhysRevLett.106.225002

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 33 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE PAGES and OSTI.GOV collections:

Observation of Peak Neoclassical Toroidal Viscous Force in the DIII-D Tokamak

Journal Article Cole, A J ; Callen, J D ; Hegna, C C ; ... - Physical Review Letters

Observation of a theoretically predicted peak in the neoclassical toroidal viscosity (NTV) force as a function of toroidal plasma rotation rate {Omega} is reported. The NTV was generated by applying n=3 magnetic fields from internal coils to low {Omega} plasmas produced with nearly balanced neutral beam injection. Locally, the peak corresponds to a toroidal rotation rate {Omega}{sub 0} where the radial electric field E{sub r} is near zero as determined by radial ion force balance.
https://doi.org/10.1103/PHYSREVLETT.106.225002
Peak neoclassical toroidal viscosity at low toroidal rotation in the DIII-D tokamak

Journal Article Cole, A J ; Callen, J D ; Hegna, C C ; ... - Physics of Plasmas

Observation of a theoretically predicted peak in the neoclassical toroidal viscous (NTV) force as a function of toroidal plasma rotation rate {Omega} is reported. The NTV was generated by applying n=3 magnetic fields from internal (I-)coils to low {Omega} plasmas produced with nearly balanced neutral beam injection. Locally, the peak corresponds to a toroidal rotation rate {Omega}{sub 0} where the radial electric field E{sub r} is near zero as determined by radial ion force balance.
https://doi.org/10.1063/1.3590933
Measurements of the deuterium ion toroidal rotation in the DIII-D tokamak and comparison to neoclassical theory

Journal Article Grierson, B A ; Pablant, N A ; Solomon, W M ; ... - Physics of Plasmas

Bulk ion toroidal rotation plays a critical role in controlling microturbulence and MHD stability as well as yielding important insight into angular momentum transport and the investigation of intrinsic rotation. So far, our understanding of bulk plasma flow in hydrogenic plasmas has been inferred from impurity ion velocity measurements and neoclassical theoretical calculations. However, the validity of these inferences has not been tested rigorously through direct measurement of the main-ion rotation in deuterium plasmas, particularly in regions of the plasma with steep pressure gradients where very large differences can be expected between bulk ion and impurity rotation. New advances inmore »« less
https://doi.org/10.1063/1.3694656
Comparison of measured impurity poloidal rotation in DIII-D with neoclassical predictions under low toroidal field conditions

Journal Article Burrell, Keith H. ; Grierson, Brian A. ; Solomon, Wayne M. ; ... - Nuclear Fusion

Here, predictive understanding of plasma transport is a long-term goal of fusion research. This requires testing models of plasma rotation including poloidal rotation. The present experiment was motivated by recent poloidal rotation measurements on spherical tokamaks (NSTX and MAST) which showed that the poloidal rotation of C⁺⁶ is much closer to the neoclassical prediction than reported results in larger aspect ratio machines such as TFTR, DIII-D, JT-60U and JET working at significantly higher toroidal field and ion temperature. We investigated whether the difference in aspect ratio (1.44 on NSTX versus 2.7 on DIII-D) could explain this. We measured C⁺⁶ poloidalmore »« less
Cited by 7
https://doi.org/10.1088/0029-5515/54/8/083020

Full Text Available
A neoclassical calculation of toroidal rotation profiles and comparison with DIII-D measurements

Journal Article Stacey, W M ; Johnson, R W ; Mandrekas, J - Physics of Plasmas

Momentum and particle balance and neoclassical viscosity were applied to calculate the radial profile of toroidal rotation velocity in several DIII-D [J. Luxon, Nucl. Fusion 42, 614 (2002)] discharges in a variety of energy confinement regimes (low-mode, low-mode with internal transport barrier, high-mode, and high-mode with quiescentd double barrier). Calculated toroidal rotation velocities generally were found to (over) predict measured values to well within a factor of 2.
https://doi.org/10.1063/1.2212391

Similar Records