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Title: Understanding and predicting profile structure and parametric scaling of intrinsic rotation

Abstract

This study reports on a recent advance in developing physical understanding and a first-principles-based model for predicting intrinsic rotation profiles in magnetic fusion experiments. It is shown for the first time that turbulent fluctuation-driven residual stress (a non-diffusive component of momentum flux) along with diffusive momentum flux can account for both the shape and magnitude of the observed intrinsic toroidal rotation profile. Both the turbulence intensity gradient and zonal flow E×B shear are identified as major contributors to the generation of the k -asymmetry needed for the residual stress generation. The model predictions of core rotation based on global gyrokinetic simulations agree well with the experimental measurements of main ion toroidal rotation for a set of DIII-D ECH discharges. The validated model is further used to investigate the characteristic dependence of residual stress and intrinsic rotation profile structure on the multi-dimensional parametric space covering the turbulence type, q-profile structure, and up-down asymmetry in magnetic geometry with the goal of developing the physics understanding needed for rotation profile control and optimization. It is shown that in the flat-q profile regime, intrinsic rotations driven by ITG and TEM turbulence are in the opposite direction (i.e., intrinsic rotation reverses). The predictive model alsomore » produces reversed intrinsic rotation for plasmas with weak and normal shear q-profiles.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [2]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. Univ. of California, San Diego, La Jolla, CA (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1419789
Alternate Identifier(s):
OSTI ID: 1374677
Grant/Contract Number:  
AC02-09CH11466; FC02-04ER54698
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 9; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Wang, W. X., Grierson, B. A., Ethier, S., Chen, J., Startsev, E., and Diamond, P. H. Understanding and predicting profile structure and parametric scaling of intrinsic rotation. United States: N. p., 2017. Web. doi:10.1063/1.4997789.
Wang, W. X., Grierson, B. A., Ethier, S., Chen, J., Startsev, E., & Diamond, P. H. Understanding and predicting profile structure and parametric scaling of intrinsic rotation. United States. doi:10.1063/1.4997789.
Wang, W. X., Grierson, B. A., Ethier, S., Chen, J., Startsev, E., and Diamond, P. H. Thu . "Understanding and predicting profile structure and parametric scaling of intrinsic rotation". United States. doi:10.1063/1.4997789. https://www.osti.gov/servlets/purl/1419789.
@article{osti_1419789,
title = {Understanding and predicting profile structure and parametric scaling of intrinsic rotation},
author = {Wang, W. X. and Grierson, B. A. and Ethier, S. and Chen, J. and Startsev, E. and Diamond, P. H.},
abstractNote = {This study reports on a recent advance in developing physical understanding and a first-principles-based model for predicting intrinsic rotation profiles in magnetic fusion experiments. It is shown for the first time that turbulent fluctuation-driven residual stress (a non-diffusive component of momentum flux) along with diffusive momentum flux can account for both the shape and magnitude of the observed intrinsic toroidal rotation profile. Both the turbulence intensity gradient and zonal flow E×B shear are identified as major contributors to the generation of the k∥-asymmetry needed for the residual stress generation. The model predictions of core rotation based on global gyrokinetic simulations agree well with the experimental measurements of main ion toroidal rotation for a set of DIII-D ECH discharges. The validated model is further used to investigate the characteristic dependence of residual stress and intrinsic rotation profile structure on the multi-dimensional parametric space covering the turbulence type, q-profile structure, and up-down asymmetry in magnetic geometry with the goal of developing the physics understanding needed for rotation profile control and optimization. It is shown that in the flat-q profile regime, intrinsic rotations driven by ITG and TEM turbulence are in the opposite direction (i.e., intrinsic rotation reverses). The predictive model also produces reversed intrinsic rotation for plasmas with weak and normal shear q-profiles.},
doi = {10.1063/1.4997789},
journal = {Physics of Plasmas},
number = 9,
volume = 24,
place = {United States},
year = {2017},
month = {8}
}

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Works referenced in this record:

Transport-driven Scrape-Off-Layer flows and the boundary conditions imposed at the magnetic separatrix in a tokamak plasma
journal, September 2004


Intrinsic torque reversals induced by magnetic shear effects on the turbulence spectrum in tokamak plasmasa)
journal, May 2015

  • Lu, Z. X.; Wang, W. X.; Diamond, P. H.
  • Physics of Plasmas, Vol. 22, Issue 5
  • DOI: 10.1063/1.4919395

Momentum and thermal transport in neutral-beam-heated tokamaks
journal, January 1988

  • Mattor, N.; Diamond, P. H.
  • Physics of Fluids, Vol. 31, Issue 5
  • DOI: 10.1063/1.866747

Observation of Spontaneous Toroidal Rotation Inversion in Ohmically Heated Tokamak Plasmas
journal, December 2006


Flow shear induced fluctuation suppression in finite aspect ratio shaped tokamak plasma
journal, May 1995

  • Hahm, T. S.; Burrell, K. H.
  • Physics of Plasmas, Vol. 2, Issue 5
  • DOI: 10.1063/1.871313

Intrinsic rotation and electric field shear
journal, April 2007

  • Gürcan, Ö. D.; Diamond, P. H.; Hahm, T. S.
  • Physics of Plasmas, Vol. 14, Issue 4
  • DOI: 10.1063/1.2717891

Intrinsic rotation in DIII-D
journal, May 2007

  • deGrassie, J. S.; Rice, J. E.; Burrell, K. H.
  • Physics of Plasmas, Vol. 14, Issue 5
  • DOI: 10.1063/1.2539055

Identification of new turbulence contributions to plasma transport and confinement in spherical tokamak regime
journal, October 2015

  • Wang, W. X.; Ethier, S.; Ren, Y.
  • Physics of Plasmas, Vol. 22, Issue 10
  • DOI: 10.1063/1.4933216

Gyrokinetic simulation of momentum transport with residual stress from diamagnetic level velocity shears
journal, April 2011

  • Waltz, R. E.; Staebler, G. M.; Solomon, W. M.
  • Physics of Plasmas, Vol. 18, Issue 4
  • DOI: 10.1063/1.3579481

Intrinsic rotation driven by the electrostatic turbulence in up-down asymmetric toroidal plasmas
journal, June 2009

  • Camenen, Y.; Peeters, A. G.; Angioni, C.
  • Physics of Plasmas, Vol. 16, Issue 6
  • DOI: 10.1063/1.3138747

Residual parallel Reynolds stress due to turbulence intensity gradient in tokamak plasmas
journal, November 2010

  • Gürcan, Ö. D.; Diamond, P. H.; Hennequin, P.
  • Physics of Plasmas, Vol. 17, Issue 11
  • DOI: 10.1063/1.3503624

Linear gyrokinetic calculations of toroidal momentum transport in a tokamak due to the ion temperature gradient mode
journal, July 2005

  • Peeters, A. G.; Angioni, C.
  • Physics of Plasmas, Vol. 12, Issue 7
  • DOI: 10.1063/1.1949608

Characterization of intrinsic rotation drive on DIII-D
journal, May 2011


Shear-induced Reynolds stress at the edge of L-mode tokamak plasmas
journal, September 2012


Measurements of the deuterium ion toroidal rotation in the DIII-D tokamak and comparison to neoclassical theory
journal, May 2012

  • Grierson, B. A.; Burrell, K. H.; Heidbrink, W. W.
  • Physics of Plasmas, Vol. 19, Issue 5
  • DOI: 10.1063/1.3694656

Self-organized criticality: An explanation of the 1/ f noise
journal, July 1987


Momentum transport in electron-dominated NSTX spherical torus plasmas
journal, March 2009


Effects of q -profile structures on intrinsic torque reversals
journal, August 2015


Rotation Reversal Bifurcation and Energy Confinement Saturation in Tokamak Ohmic L -Mode Plasmas
journal, December 2011


Study of ion turbulent transport and profile formations using global gyrokinetic full- f Vlasov simulation
journal, May 2009


Investigation of self-organized criticality behavior of edge plasma transport in Torus experiment of technology oriented research
journal, December 2004

  • Xu, Y. H.; Jachmich, S.; Weynants, R. R.
  • Physics of Plasmas, Vol. 11, Issue 12
  • DOI: 10.1063/1.1810160

An overview of intrinsic torque and momentum transport bifurcations in toroidal plasmas
journal, September 2013


Effects of Magnetic Shear on Toroidal Rotation in Tokamak Plasmas with Lower Hybrid Current Drive
journal, September 2013


Nonlinear flow generation by electrostatic turbulence in tokamaks
journal, July 2010

  • Wang, W. X.; Diamond, P. H.; Hahm, T. S.
  • Physics of Plasmas, Vol. 17, Issue 7
  • DOI: 10.1063/1.3459096

Gyro-kinetic simulation of global turbulent transport properties in tokamak experiments
journal, September 2006

  • Wang, W. X.; Lin, Z.; Tang, W. M.
  • Physics of Plasmas, Vol. 13, Issue 9
  • DOI: 10.1063/1.2338775

Anomalous momentum transport from drift wave turbulence
journal, November 1993

  • Dominguez, R. R.; Staebler, G. M.
  • Physics of Fluids B: Plasma Physics, Vol. 5, Issue 11
  • DOI: 10.1063/1.860610

Anomalous Transport Scaling in the DIII-D Tokamak Matched by Supercomputer Simulation
journal, July 2003


Active spectroscopic measurements of the bulk deuterium properties in the DIII-D tokamak (invited)
journal, October 2012

  • Grierson, B. A.; Burrell, K. H.; Chrystal, C.
  • Review of Scientific Instruments, Vol. 83, Issue 10
  • DOI: 10.1063/1.4739239

Consequences of profile shearing on toroidal momentum transport
journal, June 2011


Avalanchelike bursts in global gyrokinetic simulations
journal, February 2009

  • McMillan, B. F.; Jolliet, S.; Tran, T. M.
  • Physics of Plasmas, Vol. 16, Issue 2
  • DOI: 10.1063/1.3079076

Dependence of intrinsic rotation reversals on collisionality in MAST
journal, February 2015


Observation of Avalanchelike Phenomena in a Magnetically Confined Plasma
journal, February 2000


Toroidal rotation in DIII-D in electron cyclotron heating and Ohmic H-mode discharges
journal, September 2004

  • deGrassie, J. S.; Burrell, K. H.; Baylor, L. R.
  • Physics of Plasmas, Vol. 11, Issue 9
  • DOI: 10.1063/1.1778751

Anomalous parallel momentum transport due to E×B flow shear in a tokamak plasma
journal, September 2009

  • Casson, F. J.; Peeters, A. G.; Camenen, Y.
  • Physics of Plasmas, Vol. 16, Issue 9
  • DOI: 10.1063/1.3227650

Transport-Driven Toroidal Rotation in the Tokamak Edge
journal, February 2012


Up-down symmetry of the turbulent transport of toroidal angular momentum in tokamaks
journal, June 2011

  • Parra, Felix I.; Barnes, Michael; Peeters, Arthur G.
  • Physics of Plasmas, Vol. 18, Issue 6
  • DOI: 10.1063/1.3586332

Main-Ion Intrinsic Toroidal Rotation Profile Driven by Residual Stress Torque from Ion Temperature Gradient Turbulence in the DIII-D Tokamak
journal, January 2017


Experimental evidence of edge intrinsic momentum source driven by kinetic ion loss and edge radial electric fields in tokamaks
journal, September 2016

  • Boedo, J. A.; deGrassie, J. S.; Grierson, B.
  • Physics of Plasmas, Vol. 23, Issue 9
  • DOI: 10.1063/1.4962683

Chapter 2: Plasma confinement and transport
journal, June 2007

  • Physics), E. J. Doyle (Chair Transport; Modelling), W. A. Houlberg (Chair Confinement Da; Edge), Y. Kamada (Chair Pedestal and
  • Nuclear Fusion, Vol. 47, Issue 6
  • DOI: 10.1088/0029-5515/47/6/S02

Transport of parallel momentum by collisionless drift wave turbulence
journal, January 2008

  • Diamond, P. H.; McDevitt, C. J.; Gürcan, Ö. D.
  • Physics of Plasmas, Vol. 15, Issue 1
  • DOI: 10.1063/1.2826436