Testing neoclassical and turbulent effects on poloidal rotation in the core of DIII-D

Chrystal, Colin; Burrell, Keith H.; Grierson, Brian A.; Staebler, Gary M.; Solomon, Wayne M.; Wang, W. X.; Rhodes, Terry L.; Schmitz, Lothar; Kinsey, Jon E.; Lao, Lang L.; deGrassie, John S.; Mordijck, Saskia; Meneghini, Orso

doi:10.1063/1.4887296

Title: Testing neoclassical and turbulent effects on poloidal rotation in the core of DIII-D

Journal Article · Wed Jul 09 00:00:00 EDT 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4887296· OSTI ID:1354824

Chrystal, Colin ^[1]; Burrell, Keith H. ^[2]; Grierson, Brian A. ^[3]; Staebler, Gary M. ^[2]; Solomon, Wayne M. ^[3]; Wang, W. X. ^[3]; Rhodes, Terry L. ^[4]; Schmitz, Lothar ^[4]; Kinsey, Jon E. ^[2]; Lao, Lang L. ^[2]; deGrassie, John S. ^[2]; Mordijck, Saskia ^[5]; Meneghini, Orso ^[6]

Univ. of California San Diego, La Jolla, CA (United States)
General Atomics, San Diego, CA (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Univ. of California, Los Angeles, CA (United States)
College of William and Mary, Williamsburg, VA (United States)
Oak Ridge Associated Univ., Oak Ridge, TN (United States)

Experimental tests of ion poloidal rotation theories have been performed on DIII-D using a novel impurity poloidal rotation diagnostic. These tests show significant disagreements with theoretical predictions in various conditions, including L-mode plasmas with internal transport barriers (ITB), H-mode plasmas, and QH-mode plasmas. The theories tested include standard neoclassical theory, turbulence driven Reynolds stress, and fast-ion friction on the thermal ions. Poloidal rotation is observed to spin up at the formation of an ITB and makes a significant contribution to the measurement of the $$\vec{E}$$ × $$\vec{B}$$ shear that forms the ITB. In ITB cases, neoclassical theory agrees quantitatively with the experimental measurements only in the steep gradient region. Significant quantitative disagreement with neoclassical predictions is seen in the cores of ITB, QH-, and H-mode plasmas, demonstrating that neoclassical theory is an incomplete description of poloidal rotation. The addition of turbulence driven Reynolds stress does not remedy this disagreement; linear stability calculations and Doppler backscattering measurements show that disagreement increases as turbulence levels decline. Furthermore, the effect of fast-ion friction, by itself, does not lead to improved agreement; in QH-mode plasmas, neoclassical predictions are closest to experimental results in plasmas with the largest fast ion friction. Finally, predictions from a new model that combines all three effects show somewhat better agreement in the H-mode case, but discrepancies well outside the experimental error bars remain.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Univ. of California, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: FC02-04ER54698

OSTI ID:: 1354824

Journal Information:: Physics of Plasmas, Vol. 21, Issue 7; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 11 works

Citation information provided by
Web of Science

References (39)

Influence of toroidal rotation on transport and stability in hybrid scenario plasmas in DIII-D Politzer, P. A.; Petty, C. C.; Jayakumar, R. J. Nuclear Fusion, Vol. 48, Issue 7 https://doi.org/10.1088/0029-5515/48/7/075001	journal	May 2008
Beyond paradigm: Turbulence, transport, and the origin of the radial electric field in low to high confinement mode transitions in the DIII‐D tokamak Moyer, R. A.; Burrell, K. H.; Carlstrom, T. N. Physics of Plasmas, Vol. 2, Issue 6 https://doi.org/10.1063/1.871263	journal	June 1995
Effects of E×B velocity shear and magnetic shear on turbulence and transport in magnetic confinement devices Burrell, K. H. Physics of Plasmas, Vol. 4, Issue 5 https://doi.org/10.1063/1.872367	journal	May 1997
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
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
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
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
Toroidal and poloidal momentum transport studies in JET Tala, T.; Andrew, Y.; Crombé, K. Nuclear Fusion, Vol. 47, Issue 8 https://doi.org/10.1088/0029-5515/47/8/036	journal	August 2007
Comparison of poloidal velocity measurements to neoclassical theory on the National Spherical Torus Experiment Bell, R. E.; Andre, R.; Kaye, S. M. Physics of Plasmas, Vol. 17, Issue 8 https://doi.org/10.1063/1.3478571	journal	August 2010
Comparison of measured poloidal rotation in MAST spherical tokamak plasmas with neo-classical predictions Field, A. R.; McCone, J.; Conway, N. J. Plasma Physics and Controlled Fusion, Vol. 51, Issue 10 https://doi.org/10.1088/0741-3335/51/10/105002	journal	September 2009
Calculation of impurity poloidal rotation from measured poloidal asymmetries in the toroidal rotation of a tokamak plasma Chrystal, C.; Burrell, K. H.; Grierson, B. A. Review of Scientific Instruments, Vol. 83, Issue 10 https://doi.org/10.1063/1.4728097	journal	October 2012
Indirect measurement of poloidal rotation using inboard–outboard asymmetry of toroidal rotation and comparison with neoclassical predictions Bortolon, A.; Camenen, Y.; Karpushov, A. N. Nuclear Fusion, Vol. 53, Issue 2 https://doi.org/10.1088/0029-5515/53/2/023002	journal	January 2013
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
New understanding of poloidal rotation measurements in a Tokamak plasma Bell, R. E. The 12th topical conference on atomic processes in plasmas, AIP Conference Proceedings https://doi.org/10.1063/1.1361778	conference	January 2000
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
Reconstruction of current profile parameters and plasma shapes in tokamaks Lao, L. L.; St. John, H.; Stambaugh, R. D. Nuclear Fusion, Vol. 25, Issue 11 https://doi.org/10.1088/0029-5515/25/11/007	journal	November 1985
Poloidal Rotation in TFTR Reversed Shear Plasmas Bell, R. E.; Levinton, F. M.; Batha, S. H. Physical Review Letters, Vol. 81, Issue 7 https://doi.org/10.1103/PhysRevLett.81.1429	journal	August 1998
Core barrier formation near integer q surfaces in DIII-D Austin, M. E.; Burrell, K. H.; Waltz, R. E. Physics of Plasmas, Vol. 13, Issue 8 https://doi.org/10.1063/1.2245579	journal	August 2006
Prompt toroidal momentum balance with collisionless neutral beam injected torque in DIII-D deGrassie, J. S.; Groebner, R. J.; Burrell, K. H. Physics of Plasmas, Vol. 13, Issue 11 https://doi.org/10.1063/1.2374862	journal	November 2006
Flow shear induced fluctuation suppression in finite aspect ratio shaped tokamak plasma Hahm, T. S.; Burrell, K. H. Physics of Plasmas, Vol. 2, Issue 5 https://doi.org/10.1063/1.871313	journal	May 1995
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
Comparison of toroidal rotation velocities of different impurity ions in the DIII-D tokamak Baylor, L. R.; Burrell, K. H.; Groebner, R. J. Physics of Plasmas, Vol. 11, Issue 6 https://doi.org/10.1063/1.1710900	journal	June 2004
Kinetic calculation of neoclassical transport including self-consistent electron and impurity dynamics Belli, E. A.; Candy, J. Plasma Physics and Controlled Fusion, Vol. 50, Issue 9 https://doi.org/10.1088/0741-3335/50/9/095010	journal	July 2008
Self-Regulating Shear Flow Turbulence: A Paradigm for the L to H Transition Diamond, P. H.; Liang, Y. -M.; Carreras, B. A. Physical Review Letters, Vol. 72, Issue 16 https://doi.org/10.1103/PhysRevLett.72.2565	journal	April 1994
Toroidal flow and radial particle flux in tokamak plasmas Callen, J. D.; Cole, A. J.; Hegna, C. C. Physics of Plasmas, Vol. 16, Issue 8 https://doi.org/10.1063/1.3206976	journal	August 2009
Poloidal momentum transport due to drift-waves in toroidal geometry Staebler, G. M. Physics of Plasmas, Vol. 11, Issue 3 https://doi.org/10.1063/1.1647564	journal	March 2004
Turbulent-driven low-frequency sheared E × B flows as the trigger for the H-mode transition Tynan, G. R.; Xu, M.; Diamond, P. H. Nuclear Fusion, Vol. 53, Issue 7 https://doi.org/10.1088/0029-5515/53/7/073053	journal	July 2013
Gyrokinetic theory and simulation of angular momentum transport Waltz, R. E.; Staebler, G. M.; Candy, J. Physics of Plasmas, Vol. 14, Issue 12 https://doi.org/10.1063/1.2824376	journal	December 2007
Erratum: “Gyrokinetic theory and simulation of angular momentum transport” [Phys. Plasmas 14, 122507 (2007)] Waltz, R. E.; Staebler, G. M.; Candy, J. Physics of Plasmas, Vol. 16, Issue 7 https://doi.org/10.1063/1.3167808	journal	July 2009
Comparison of initial value and eigenvalue codes for kinetic toroidal plasma instabilities Kotschenreuther, Mike; Rewoldt, G.; Tang, W. M. Computer Physics Communications, Vol. 88, Issue 2-3 https://doi.org/10.1016/0010-4655(95)00035-E	journal	August 1995
A theory-based transport model with comprehensive physics Staebler, G. M.; Kinsey, J. E.; Waltz, R. E. Physics of Plasmas, Vol. 14, Issue 5 https://doi.org/10.1063/1.2436852	journal	May 2007
A novel, multichannel, comb-frequency Doppler backscatter system Peebles, W. A.; Rhodes, T. L.; Hillesheim, J. C. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3464266	journal	October 2010
Nonlinear flow generation by electrostatic turbulence in tokamaks Wang, W. X.; Diamond, P. H.; Hahm, T. S. Physics of Plasmas, Vol. 17, Issue 7 https://doi.org/10.1063/1.3459096	journal	July 2010
Effects of neutral beam injection on poloidal rotation and energy transport in tokamaks Hinton, F. L.; Kim, Y. ‐B. Physics of Fluids B: Plasma Physics, Vol. 5, Issue 8 https://doi.org/10.1063/1.860687	journal	August 1993
Collisional bulk ion transport and poloidal rotation driven by neutral beam injection Newton, Sarah L.; Helander, Per; Catto, Peter J. Physics of Plasmas, Vol. 14, Issue 6 https://doi.org/10.1063/1.2734181	journal	June 2007
The tokamak Monte Carlo fast ion module NUBEAM in the National Transport Code Collaboration library Pankin, Alexei; McCune, Douglas; Andre, Robert Computer Physics Communications, Vol. 159, Issue 3 https://doi.org/10.1016/j.cpc.2003.11.002	journal	June 2004
Simulations of internal transport barrier formation in tokamak discharges using the GLF23 transport model Kinsey, J. E.; Staebler, G. M.; Waltz, R. E. Physics of Plasmas, Vol. 9, Issue 5 https://doi.org/10.1063/1.1470166	journal	May 2002
Momentum and heat friction forces between fast ions and thermal plasma species Wang, J. P.; Azumi, M.; Tani, K. Nuclear Fusion, Vol. 34, Issue 2 https://doi.org/10.1088/0029-5515/34/2/I06	journal	February 1994
Parallel transport studies of high-Z impurities in the core of Alcator C-Mod plasmas Reinke, M. L.; Hutchinson, I. H.; Rice, J. E. Physics of Plasmas, Vol. 20, Issue 5 https://doi.org/10.1063/1.4802197	journal	May 2013

Cited By (4)

Main ion and impurity edge profile evolution across the L- to H-mode transition on DIII-D Haskey, S. R.; Grierson, B. A.; Chrystal, C. Plasma Physics and Controlled Fusion, Vol. 60, Issue 10 https://doi.org/10.1088/1361-6587/aad702	journal	August 2018
In–out impurity density asymmetry due to the Coriolis force in a rotating tokamak plasma Pan, Chengkang; Wang, Shaojie; Xiao, Xiaotao Nuclear Fusion, Vol. 58, Issue 10 https://doi.org/10.1088/1741-4326/aadaf3	journal	September 2018
Studies of Reynolds stress and the turbulent generation of edge poloidal flows on the HL-2A tokamak Long, T.; Diamond, P. H.; Xu, M. Nuclear Fusion, Vol. 59, Issue 10 https://doi.org/10.1088/1741-4326/ab33cf	journal	August 2019
In-Out impurity density asymmetry due to the Coriolis force in a rotating tokamak plasma Pan, Chengkang; Wang, Shaojie; Xiao, Xiaotao arXiv https://doi.org/10.48550/arxiv.1801.08298	text	January 2018

Similar Records

Testing neoclassical and turbulent effects on poloidal rotation in the core of DIII-D

Journal Article · Tue Jul 15 00:00:00 EDT 2014 · Physics of Plasmas · OSTI ID:1354824

Chrystal, C.; Burrell, K. H.; Staebler, G. M.; +10 more

Effects of beam-driven poloidal rotation on the neoclassical bootstrap current

Conference · Tue Dec 31 00:00:00 EST 1996 · OSTI ID:1354824

Lin-Liu, Y R; Hinton, F L

Poloidal Rotation Dynamics, Radial Electric Field, and Neoclassical Theory in the Jet Internal-Transport-Barrier Region

Journal Article · Fri Oct 07 00:00:00 EDT 2005 · Physical Review Letters · OSTI ID:1354824

Crombe, K; Oost, G van; Andrew, Y; +10 more

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Title: Testing neoclassical and turbulent effects on poloidal rotation in the core of DIII-D

Citation Formats

References (39)

Cited By (4)

Similar Records

Related Subjects