Interpretation of rotation and momentum transport in the DIII-D edge plasma and comparison with neoclassical theory

Stacey, Weston M.; Grierson, Brian A.

doi:10.1088/0029-5515/54/7/073021

Interpretation of rotation and momentum transport in the DIII-D edge plasma and comparison with neoclassical theory

Journal Article · Thu May 08 00:00:00 EDT 2014 · Nuclear Fusion

DOI:https://doi.org/10.1088/0029-5515/54/7/073021· OSTI ID:1376201

Stacey, Weston M. ^[1]; Grierson, Brian A. ^[2]

Georgia Inst. of Technology, Atlanta, GA (United States); General Atomics
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Here, a low-confinement mode discharge which optimizes the capability of the new main-ion chargeexchange-recombination spectroscopy system on DIII-D to measure deuterium toroidal velocity is interpretted in comparison with the predictions of neoclassical theory, with an emphasis on the plasma edge region. The observed peaking in the deuterium toroidal velocity near the separatrix is shown to be consistent with intrinsic co-rotation due to ion orbit loss. In general, the standard neoclassical toroidal and poloidal momentum transport rates are found to be smaller than those inferred from experiment, but a comparison has not yet been made with the more recent extended neoclassical theory that calculates the effects of poloidal asymmetries using an elongated flux surface representation.

View Accepted Manuscript (DOE)

Research Organization:: General Atomics, San Diego, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FC02-04ER54698

OSTI ID:: 1376201

Alternate ID(s):: OSTI ID: 22331310

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 7 Vol. 54; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

References (35)

Fusion Plasma Physics Stacey, Weston M. Wiley‐VCH Verlag GmbH & Co. https://doi.org/10.1002/9783527669516	book	August 2012
Ion Particle Transport in the Tokamak Edge Plasma Stacey, W. M. Contributions to Plasma Physics, Vol. 48, Issue 1-3 https://doi.org/10.1002/ctpp.200810016	journal	March 2008
Comparision of neoclassical rotation theory with experiment under a variety of conditions in DIII-D Stacey, W. M.; Mandrekas, J. Physics of Plasmas, Vol. 9, Issue 5 https://doi.org/10.1063/1.1464892	journal	May 2002
X-transport: A baseline nonambipolar transport in a diverted tokamak plasma edge Chang, C. S.; Kue, Seunghoe; Weitzner, H. Physics of Plasmas, Vol. 9, Issue 9 https://doi.org/10.1063/1.1490348	journal	September 2002
Extraction of poloidal velocity from charge exchange recombination spectroscopy measurements Solomon, W. M.; Burrell, K. H.; Gohil, P. Review of Scientific Instruments, Vol. 75, Issue 10 https://doi.org/10.1063/1.1790042	journal	October 2004
Experimental test of the neoclassical theory of impurity poloidal rotation in tokamaks Solomon, W. M.; Burrell, K. H.; Andre, R. Physics of Plasmas, Vol. 13, Issue 5 https://doi.org/10.1063/1.2180728	journal	May 2006
Collective electric field effects on the confinement of fast ions in tokamaks McClements, K. G.; Thyagaraja, A. Physics of Plasmas, Vol. 13, Issue 4 https://doi.org/10.1063/1.2188401	journal	April 2006
A neoclassical calculation of toroidal rotation profiles and comparison with DIII-D measurements Stacey, W. M.; Johnson, R. W.; Mandrekas, J. Physics of Plasmas, Vol. 13, Issue 6 https://doi.org/10.1063/1.2212391	journal	June 2006
Extension and comparison of neoclassical models for poloidal rotation in tokamaks Stacey, W. M. Physics of Plasmas, Vol. 15, Issue 1 https://doi.org/10.1063/1.2829073	journal	January 2008
Interpretation of edge pedestal rotation measurements in DIII-D Stacey, W. M.; Groebner, R. J. Physics of Plasmas, Vol. 15, Issue 1 https://doi.org/10.1063/1.2830653	journal	January 2008
Characterization of cross-section correction to charge exchange recombination spectroscopy rotation measurements using co- and counter-neutral-beam views Solomon, W. M.; Burrell, K. H.; Feder, R. Review of Scientific Instruments, Vol. 79, Issue 10 https://doi.org/10.1063/1.2957841	journal	October 2008
Poloidally and radially resolved parallel D+ velocity measurements in the DIII-D boundary and comparison to neoclassical computations Boedo, J. A.; Belli, E. A.; Hollmann, E. Physics of Plasmas, Vol. 18, Issue 3 https://doi.org/10.1063/1.3559492	journal	March 2011
Intrinsic rotation generation in ELM-free H-mode plasmas in the DIII-D tokamak—Experimental observations Müller, S. H.; Boedo, J. A.; Burrell, K. H. Physics of Plasmas, Vol. 18, Issue 7 https://doi.org/10.1063/1.3605041	journal	July 2011
The effect of ion orbit loss and X-loss on the interpretation of ion energy and particle transport in the DIII-D edge plasma Stacey, Weston M. Physics of Plasmas, Vol. 18, Issue 10 https://doi.org/10.1063/1.3640506	journal	October 2011
X-transport of ions in diverted tokamaks, with application to DIII-D Stacey, Weston M. Physics of Plasmas, Vol. 18, Issue 12 https://doi.org/10.1063/1.3671910	journal	December 2011
Measurements of the deuterium ion toroidal rotation in the DIII-D tokamak and comparison to neoclassical theory Grierson, B. A.; Burrell, K. H.; Heidbrink, W. W. Physics of Plasmas, Vol. 19, Issue 5 https://doi.org/10.1063/1.3694656	journal	May 2012
Ohmic energy confinement saturation and core toroidal rotation reversal in Alcator C-Mod plasmas Rice, J. E.; Greenwald, M. J.; Podpaly, Y. A. Physics of Plasmas, Vol. 19, Issue 5 https://doi.org/10.1063/1.3695213	journal	May 2012
Active spectroscopic measurements of the bulk deuterium properties in the DIII-D tokamak (invited) Grierson, B. A.; Burrell, K. H.; Chrystal, C. Review of Scientific Instruments, Vol. 83, Issue 10 https://doi.org/10.1063/1.4739239	journal	October 2012
Intrinsic rotation produced by ion orbit loss and X-loss Stacey, W. M.; Boedo, J. A.; Evans, T. E. Physics of Plasmas, Vol. 19, Issue 11 https://doi.org/10.1063/1.4768424	journal	November 2012
Neoclassical poloidal and toroidal rotation in tokamaks Kim, Y. B.; Diamond, P. H.; Groebner, R. J. Physics of Fluids B: Plasma Physics, Vol. 3, Issue 8 https://doi.org/10.1063/1.859671	journal	August 1991
Viscous effects in a collisional tokamak plasma with strong rotation Stacey, W. M.; Sigmar, D. J. Physics of Fluids, Vol. 28, Issue 9 https://doi.org/10.1063/1.865240	journal	September 1985
Bootstrap current and neoclassical transport in tokamaks of arbitrary collisionality and aspect ratio Houlberg, W. A.; Shaing, K. C.; Hirshman, S. P. Physics of Plasmas, Vol. 4, Issue 9 https://doi.org/10.1063/1.872465	journal	September 1997
Neoclassical transport of impurities in tokamak plasmas Hirshman, S. P.; Sigmar, D. J. Nuclear Fusion, Vol. 21, Issue 9 https://doi.org/10.1088/0029-5515/21/9/003	journal	September 1981
Rotation and impurity transport in a tokamak plasma with directed neutral-beam injection Stacey, W. M.; Bailey, A. W.; Sigmar, D. J. Nuclear Fusion, Vol. 25, Issue 4 https://doi.org/10.1088/0029-5515/25/4/007	journal	April 1985
Direct ion orbit loss near the plasma edge of a divertor tokamak in the presence of a radial electric field Miyamoto, K. Nuclear Fusion, Vol. 36, Issue 7 https://doi.org/10.1088/0029-5515/36/7/I09	journal	July 1996
Resistive wall mode dynamics and active feedback control in DIII-D Garofalo, A. M.; Chu, M. S.; Fredrickson, E. D. Nuclear Fusion, Vol. 41, Issue 9 https://doi.org/10.1088/0029-5515/41/9/305	journal	September 2001
A design retrospective of the DIII-D tokamak Luxon, J. L. Nuclear Fusion, Vol. 42, Issue 5 https://doi.org/10.1088/0029-5515/42/5/313	journal	May 2002
Toroidal rotation in neutral beam heated discharges in DIII-D deGrassie, J. S.; Baker, D. R.; Burrell, K. H. Nuclear Fusion, Vol. 43, Issue 2 https://doi.org/10.1088/0029-5515/43/2/307	journal	January 2003
Intrinsic toroidal velocity near the edge of DIII-D H-mode plasmas deGrassie, J. S.; Groebner, R. J.; Burrell, K. H. Nuclear Fusion, Vol. 49, Issue 8 https://doi.org/10.1088/0029-5515/49/8/085020	journal	July 2009
Plasma flow due to a loss-cone distribution centred around the outboard edge in DIII-D deGrassie, J. S.; Müller, S. H.; Boedo, J. A. Nuclear Fusion, Vol. 52, Issue 1 https://doi.org/10.1088/0029-5515/52/1/013010	journal	December 2011
Non-diffusive transport in the tokamak edge pedestal Stacey, W. M.; Groebner, R. J.; Evans, T. E. Nuclear Fusion, Vol. 52, Issue 11 https://doi.org/10.1088/0029-5515/52/11/114020	journal	October 2012
Collisionality scaling of main-ion toroidal and poloidal rotation in low torque DIII-D plasmas Grierson, B. A.; Burrell, K. H.; Solomon, W. M. Nuclear Fusion, Vol. 53, Issue 6 https://doi.org/10.1088/0029-5515/53/6/063010	journal	May 2013
Effect of ion orbit loss on distribution of particle, energy and momentum sources into the tokamak scrape-off layer Stacey, W. M. Nuclear Fusion, Vol. 53, Issue 6 https://doi.org/10.1088/0029-5515/53/6/063011	journal	May 2013
Stabilization of external modes in tokamaks by resistive walls and plasma rotation Bondeson, A.; Ward, D. J. Physical Review Letters, Vol. 72, Issue 17 https://doi.org/10.1103/PhysRevLett.72.2709	journal	April 1994
The charge exchange recombination diagnostic system on the DIII-D tokamak Gohil, P.; Burrell, K. H.; Groebner, R. J. [Proceedings] The 14th IEEE/NPSS Symposium Fusion Engineering https://doi.org/10.1109/FUSION.1991.218656	conference	January 1992

Cited By (5)

Improvements to an ion orbit loss calculation in the tokamak edge Wilks, T. M.; Stacey, W. M. Physics of Plasmas, Vol. 23, Issue 12 https://doi.org/10.1063/1.4968219	journal	December 2016
The dependence of ion orbit loss on ion charge and mass Stacey, Weston M. Physics of Plasmas, Vol. 25, Issue 12 https://doi.org/10.1063/1.5048387	journal	December 2018
A Particle-, Momentum-, and Energy-Conserving Fluid Transport Theory for the Tokamak Plasma Edge Stacey, Weston M. Fusion Science and Technology, Vol. 75, Issue 4 https://doi.org/10.1080/15361055.2019.1574529	journal	May 2019
Change in ion orbit loss, intrinsic rotation and particle pinch across the L–H transition in DIII-D plasmas Piper, N. A.; Stacey, W. M.; Groebner, R. J. Plasma Physics and Controlled Fusion, Vol. 61, Issue 5 https://doi.org/10.1088/1361-6587/ab0630	journal	March 2019
Extended fluid transport theory in the tokamak plasma edge Stacey, W. M. Nuclear Fusion, Vol. 57, Issue 6 https://doi.org/10.1088/1741-4326/aa6b34	journal	May 2017

Similar Records

Interpretation of edge pedestal rotation measurements in DIII-D

Journal Article · Mon Jan 14 23:00:00 EST 2008 · Physics of Plasmas · OSTI ID:21069964

Comparison of measured impurity poloidal rotation in DIII-D with neoclassical predictions under low toroidal field conditions

Journal Article · Wed Jun 25 20:00:00 EDT 2014 · Nuclear Fusion · OSTI ID:1352315

Collisionality Scaling of Main-ion Toroidal and Poloidal Rotation in Low Torque DIII-D Plasmas

Technical Report · Wed May 01 00:00:00 EDT 2013 · OSTI ID:1090614

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
intrinsic rotation
momentum transport
rotation

Interpretation of rotation and momentum transport in the DIII-D edge plasma and comparison with neoclassical theory

Citation Formats

References (35)

Cited By (5)

Similar Records

Related Subjects