Predicting core and edge transport barriers in tokamaks using the GLF23 drift-wave transport model

The density and temperature profiles are predicted in core and edge transport barriers in the DIII-D tokamak [J. L. Luxon and L. G. Davis, Fusion Technol. 8, 441 (1985)] using the GLF23 drift-wave model. The GLF23 model has been retuned to yield a better fit to the linear gyrokinetic growth rates for reversed magnetic shear and H-mode pedestal parameters. The turbulent saturation levels are determined using nonlinear gyrokinetic simulations. Using a large profile database, it is found that the retuned and original GLF23 models yield comparable results for discharges with monotonic safety factor profiles and no discernable internal transport barriers (ITBs). Examples of using retuned GLF23 model to predict the temperature profiles in simulations of several DIII-D strongly reversed magnetic shear ITB discharges are provided. Particle transport simulations show that the model is successful in predicting the density profile in discharges without ITBs but that some additional background particle diffusivity is...

[1]  D. Düchs.  Controlled Fusion and Plasma Physics: Report on the Fifth European Conference held in Grenoble, France, 21–25 August 1972 , 1972 .

[2]  J. L. Luxon,et al.  Big Dee - A Flexible Facility Operating Near Breakeven Conditions , 1985 .

[3]  F. Hinton,et al.  Effect of impurity particles on the finite-aspect ratio neoclassical ion thermal conductivity in a tokamak , 1986 .

[4]  Tadashi Sekiguchi,et al.  Plasma Physics and Controlled Nuclear Fusion Research , 1987 .

[5]  J. Weiland,et al.  Simulation of toroidal drift mode turbulence driven by temperature gradients and electron trapping , 1990 .

[6]  Waltz,et al.  Magnetic-field scaling of dimensionally similar tokamak discharges. , 1990, Physical review letters.

[7]  A. T. Ramsey,et al.  Nondimensional transport scaling in the Tokamak Fusion Test Reactor: Is tokamak transport Bohm or gyro‐Bohm? , 1993 .

[8]  J. Cordey,et al.  The scaling of transport with normalized Larmor radius in JET , 1993 .

[9]  P. T. Bonoli,et al.  First results from Alcator‐C‐MOD* , 1994 .

[10]  Steve C. Chiu,et al.  Nondimensional transport scaling in DIII‐D: Bohm versus gyro‐Bohm resolved , 1995 .

[11]  Clifford E Singer,et al.  Theory-based transport modeling of TFTR , 1995 .

[12]  K. H. Burrell,et al.  Flow shear induced fluctuation suppression in finite aspect ratio shaped tokamak plasma , 1995 .

[13]  J. P. Christiansen,et al.  A review of the dimensionless parameter scaling studies , 1996 .

[14]  Glenn Bateman,et al.  Theory-based transport modeling of the gyro-radius experiments , 1996 .

[15]  R. Waltz,et al.  A gyro-Landau-fluid transport model , 1997 .

[16]  C. M. Greenfield,et al.  Enhanced fusion performance due to plasma shape modification of simulated ITER discharges in DIII-D , 1997 .

[17]  W. Houlberg,et al.  Bootstrap current and neoclassical transport in tokamaks of arbitrary collisionality and aspect ratio , 1997 .

[18]  R. Waltz,et al.  Electron heat transport in improved confinement discharges in DIII-D , 1998 .

[19]  DIII-D Team,et al.  The role of radial particle flow on power balance in DIII-D , 1998 .

[20]  Arnold H. Kritz,et al.  Predicting temperature and density profiles in tokamaks , 1998 .

[21]  T. C. Luce,et al.  Scaling of heat transport with beta in the DIII-D tokamak , 1998 .

[22]  T. C. Luce,et al.  Experimental constraints on transport from dimensionless parameter scaling studies , 1998 .

[23]  Marshall N. Rosenbluth,et al.  POLOIDAL FLOW DRIVEN BY ION-TEMPERATURE-GRADIENT TURBULENCE IN TOKAMAKS , 1998 .

[24]  Frank Jenko,et al.  Electron temperature gradient driven turbulence , 1999 .

[25]  H. E. St. John,et al.  Status of Advanced Tokamak Scenario Modeling with Off-Axis Electron Cyclotron Current Drive in DIII-D , 1999 .

[26]  R. L. Miller,et al.  Ion temperature gradient turbulence simulations and plasma flux surface shape , 1999 .

[27]  T. C. Luce,et al.  Scaling of heat transport with collisionality , 1999 .

[28]  M. R. Wade,et al.  Dependence of Heat and Particle Transport on the Ratio of the Ion and Electron Temperatures , 1999 .

[29]  T. Petrie,et al.  Advanced tokamak physics in DIII-D , 2000 .

[30]  Charlson C. Kim,et al.  Comparisons and physics basis of tokamak transport models and turbulence simulations , 2000 .

[31]  G. M. D. Hogeweij,et al.  The International Multi-Tokamak Profile Database , 2000 .

[32]  J. Kinsey,et al.  Non-dimensional scaling of turbulence characteristics and turbulent diffusivity , 2001 .

[33]  L. L. Lao,et al.  Progress toward long-pulse high-performance Advanced Tokamak discharges on the DIII-D tokamak , 2001 .

[34]  M. R. Wade,et al.  Effect of rotation on H-mode transport in DIII–D via changes in the E×B velocity shear , 2002 .

[35]  Jerry M. Kinsey,et al.  BURNING PLASMA PROJECTIONS USING DRIFT WAVE TRANSPORT MODELS AND SCALINGS FOR THE H-MODE PEDESTAL , 2002 .

[36]  R. E. Waltz,et al.  Simulations of internal transport barrier formation in tokamak discharges using the GLF23 transport model , 2002 .

[37]  F. Jenko,et al.  Prediction of significant tokamak turbulence at electron gyroradius scales. , 2002, Physical review letters.

[38]  X. Litaudon,et al.  INCREASED UNDERSTANDING OF THE DYNAMICS AND TRANSPORT IN ITB PLASMAS FROM MULTI-MACHINE COMPARISONS , 2002 .

[39]  F. Ryter,et al.  Theory-based modeling of particle transport in ASDEX Upgrade H-mode plasmas, density peaking, anomalous pinch and collisionality , 2003 .

[40]  R Koch,et al.  PREFACE: 30th EPS Conference on Controlled Fusion and Plasma Physics , 2003 .

[41]  L. L. Lao,et al.  Integrated, advanced tokamak operation on DIII-D , 2003 .

[42]  J. Kinsey,et al.  Safety factor scaling of energy transport in L-mode plasmas on the DIII-D tokamak , 2004 .

[43]  G. Staebler.  Poloidal momentum transport due to drift-waves in toroidal geometry , 2004 .

[44]  E. Joffrin,et al.  Status of and prospects for advanced tokamak regimes from multi-machine comparisons using the 'International Tokamak Physics Activity' database , 2004 .

[45]  A. Kallenbach,et al.  Experimental studies of toroidal momentum transport in ASDEX Upgrade , 2004 .