Integrated modeling of plasma ramp-up in DIII-D ITER-like and high bootstrap current scenario discharges

Wu, M. Q.; Pan, C. K.; Chan, V. S.; Li, G. Q.; Garofalo, A. M.; Jian, X.; Liu, L.; Ren, Q. L.; Chen, J. L.; Gao, X.; Gong, X. Z.; Ding, S. Y.; Qian, J. P.

doi:10.1063/1.5024405

Title: Integrated modeling of plasma ramp-up in DIII-D ITER-like and high bootstrap current scenario discharges

Abstract

Here, time-dependent integrated modeling of DIII-D ITER-like and high bootstrap current plasma ramp-up discharges has been performed with the equilibrium code EFIT, and the transport codes TGYRO and ONETWO. Electron and ion temperature profiles are simulated by TGYRO with the TGLF (SAT0 or VX model) turbulent and NEO neoclassical transport models. The VX model is a new empirical extension of the TGLF turbulent model [Jian et al., Nucl. Fusion 58, 016011 (2018)], which captures the physics of multi-scale interaction between low-k and high-k turbulence from nonlinear gyro-kinetic simulation. This model is demonstrated to accurately model low Ip discharges from the EAST tokamak. Time evolution of the plasma current density profile is simulated by ONETWO with the experimental current ramp-up rate. The general trend of the predicted evolution of the current density profile is consistent with that obtained from the equilibrium reconstruction with Motional Stark effect constraints. The predicted evolution of β_N, l_i, and β_P also agrees well with the experiments. For the ITER-like cases, the predicted electron and ion temperature profiles using TGLF_Sat0 agree closely with the experimental measured profiles, and are demonstrably better than other proposed transport models. For the high bootstrap current case, the predicted electron and ionmore »« less

Authors:

^[1];

^[2]; Chan, V. S. ^[3];

^[2]; Garofalo, A. M. ^[4];

^[5]; Liu, L. ^[6];

^[2]; Chen, J. L. ^[2];

^[2]; Gong, X. Z. ^[2];

^[2]; Qian, J. P. ^[2]

Chinese Academy of Sciences, Hefei (China). Inst. of Plasma Physics; Univ. of Science and Technology of China, Hefei (China)
Chinese Academy of Sciences, Hefei (China). Inst. of Plasma Physics
Univ. of Science and Technology of China, Hefei (China); General Atomics, San Diego, CA (United States)
General Atomics, San Diego, CA (United States)
Huazhong Univ. of Science and Technology, Wuhan (China). State Key Lab. of Advanced Electromagnetic Engineering and Technology
Univ. of Science and Technology of China, Hefei (China)

Publication Date:: 2018-04-25

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

Sponsoring Org.:: USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC)

Contributing Org.:: CFETR Physics Team

OSTI Identifier:: 1540176

Alternate Identifier(s):: OSTI ID: 1434560

Grant/Contract Number:: FC02-04ER54698

Resource Type:: Accepted Manuscript

Journal Name:: Physics of Plasmas

Additional Journal Information:: Journal Volume: 25; Journal Issue: 4; 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


                    Wu, M. Q., Pan, C. K., Chan, V. S., Li, G. Q., Garofalo, A. M., Jian, X., Liu, L., Ren, Q. L., Chen, J. L., Gao, X., Gong, X. Z., Ding, S. Y., and Qian, J. P.. Integrated modeling of plasma ramp-up in DIII-D ITER-like and high bootstrap current scenario discharges.  United States: N. p., 2018. 
Web.  doi:10.1063/1.5024405.

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                    Wu, M. Q., Pan, C. K., Chan, V. S., Li, G. Q., Garofalo, A. M., Jian, X., Liu, L., Ren, Q. L., Chen, J. L., Gao, X., Gong, X. Z., Ding, S. Y., & Qian, J. P.. Integrated modeling of plasma ramp-up in DIII-D ITER-like and high bootstrap current scenario discharges.  United States.  https://doi.org/10.1063/1.5024405

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                    Wu, M. Q., Pan, C. K., Chan, V. S., Li, G. Q., Garofalo, A. M., Jian, X., Liu, L., Ren, Q. L., Chen, J. L., Gao, X., Gong, X. Z., Ding, S. Y., and Qian, J. P.. Wed .  
"Integrated modeling of plasma ramp-up in DIII-D ITER-like and high bootstrap current scenario discharges".  United States.  https://doi.org/10.1063/1.5024405.  https://www.osti.gov/servlets/purl/1540176.

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@article{osti_1540176,

  title        = {Integrated modeling of plasma ramp-up in DIII-D ITER-like and high bootstrap current scenario discharges},

  author       = {Wu, M. Q. and Pan, C. K. and Chan, V. S. and Li, G. Q. and Garofalo, A. M. and Jian, X. and Liu, L. and Ren, Q. L. and Chen, J. L. and Gao, X. and Gong, X. Z. and Ding, S. Y. and Qian, J. P.},

  abstractNote = {Here, time-dependent integrated modeling of DIII-D ITER-like and high bootstrap current plasma ramp-up discharges has been performed with the equilibrium code EFIT, and the transport codes TGYRO and ONETWO. Electron and ion temperature profiles are simulated by TGYRO with the TGLF (SAT0 or VX model) turbulent and NEO neoclassical transport models. The VX model is a new empirical extension of the TGLF turbulent model [Jian et al., Nucl. Fusion 58, 016011 (2018)], which captures the physics of multi-scale interaction between low-k and high-k turbulence from nonlinear gyro-kinetic simulation. This model is demonstrated to accurately model low Ip discharges from the EAST tokamak. Time evolution of the plasma current density profile is simulated by ONETWO with the experimental current ramp-up rate. The general trend of the predicted evolution of the current density profile is consistent with that obtained from the equilibrium reconstruction with Motional Stark effect constraints. The predicted evolution of βN, li, and βP also agrees well with the experiments. For the ITER-like cases, the predicted electron and ion temperature profiles using TGLF_Sat0 agree closely with the experimental measured profiles, and are demonstrably better than other proposed transport models. For the high bootstrap current case, the predicted electron and ion temperature profiles perform better in the VX model. It is discovered that the SAT0 model works well at high IP (>0.76 MA) while the VX model covers a wider range of plasma current (IP > 0.6 MA). The results reported in this paper suggest that the developed integrated modeling could be a candidate for ITER and CFETR ramp-up engineering design modeling.},

  doi          = {10.1063/1.5024405},

  journal      = {Physics of Plasmas},

  number       = 4,

  volume       = 25,

  place        = {United States},

  year         = {2018},

  month        = {4}

}

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Title: Integrated modeling of plasma ramp-up in DIII-D ITER-like and high bootstrap current scenario discharges

Abstract

Citation Formats

Integrated modeling applications for tokamak experiments with OMFIT journal, July 2015

Investigation of transport models in ASDEX Upgrade current ramps journal, April 2013

Integrated Modeling of Tokamak Experiments with OMFIT journal, January 2013

Concept Design of CFETR Tokamak Machine journal, March 2014

Equilibrium analysis of current profiles in tokamaks journal, June 1990

Progress in characterization and modelling of the current ramp-up phase of ASDEX Upgrade discharges journal, May 2012

Trapped gyro-Landau-fluid transport modeling of DIII-D hybrid discharges journal, December 2010

An Eulerian gyrokinetic-Maxwell solver journal, April 2003

Tokamak profile prediction using direct gyrokinetic and neoclassical simulation journal, June 2009

TSC simulation of Ohmic discharges in TFTR journal, March 1993

Advances in the high bootstrap fraction regime on DIII-D towards the Q = 5 mission of ITER steady state journal, March 2017

Physics Design of CFETR: Determination of the Device Engineering Parameters journal, March 2014

Transport physics of ASDEX Upgrade current ramps: experiment and theory journal, November 2010

ITER startup studies in the DIII-D tokamak journal, November 2008

Validation of the thermal transport model used for ITER startup scenario predictions with DIII-D experimental data journal, December 2010

The first transport code simulations using the trapped gyro-Landau-fluid model journal, May 2008

Gyrofluid simulations of turbulence suppression in reversed-shear experiments on the Tokamak Fusion Test Reactor journal, May 1997

Inductive flux usage and its optimization in tokamak operation journal, July 2014

Current ramps in tokamaks: from present experiments to ITER scenarios journal, July 2011

A stable scheme for computation of coupled transport and equilibrium equations in tokamaks journal, February 2013

Gyro-Landau fluid equations for trapped and passing particles journal, October 2005

An Eulerian method for the solution of the multi-species drift-kinetic equation journal, June 2009

Predictions of the near edge transport shortfall in DIII-D L-mode plasmas using the trapped gyro-Landau-fluid model journal, January 2015

Confinement and transport properties during current ramps in the ASDEX Upgrade tokamak journal, March 2011

Understanding and predicting the dynamics of tokamak discharges during startup and rampdown journal, May 2010

Application of an empirical saturation rule to TGLF to unify low- k and high- k turbulence dominated regimes journal, November 2017

Validating the energy transport modeling of the DIII-D and EAST ramp up experiments using TSC journal, May 2017

Multi-scale gyrokinetic simulation of tokamak plasmas: enhanced heat loss due to cross-scale coupling of plasma turbulence journal, December 2015

A review of internal transport barrier physics for steady-state operation of tokamaks journal, March 2004

Investigation of energy transport in DIII-D High- β P EAST-demonstration discharges with the TGLF turbulent and NEO neoclassical transport models journal, January 2017

A new paradigm for E × B velocity shear suppression of gyro-kinetic turbulence and the momentum pinch journal, September 2013

Kinetic calculation of neoclassical transport including self-consistent electron and impurity dynamics journal, July 2008

New Paradigm for Suppression of Gyrokinetic Turbulence by Velocity Shear journal, January 2013

Novel free-boundary equilibrium and transport solver with theory-based models and its validation against ASDEX Upgrade current ramp scenarios journal, November 2013

Resolving the mystery of transport within internal transport barriers journal, May 2014

Compatibility of internal transport barrier with steady-state operation in the high bootstrap fraction regime on DIII-D journal, November 2015

A theory-based transport model with comprehensive physics journal, May 2007

Noninductive plasma initiation and startup in the DIII-D tokamak journal, July 2011

Evaluation of CFETR as a Fusion Nuclear Science Facility using multiple system codes journal, January 2015

Dynamical coupling between magnetic equilibrium and transport in tokamak scenario modelling, with application to current ramps journal, June 2013

Chapter 1: Overview and summary journal, June 2007

Full linearized Fokker–Planck collisions in neoclassical transport simulations journal, December 2011

Simulating ITER plasma startup and rampdown scenarios in the DIII-D tokamak journal, October 2009

Turbulent energy exchange: Calculation and relevance for profile prediction journal, August 2013

Integrated modeling applications for tokamak experiments with OMFIT
journal, July 2015

Investigation of transport models in ASDEX Upgrade current ramps
journal, April 2013

Integrated Modeling of Tokamak Experiments with OMFIT
journal, January 2013

Concept Design of CFETR Tokamak Machine
journal, March 2014

Equilibrium analysis of current profiles in tokamaks
journal, June 1990

Progress in characterization and modelling of the current ramp-up phase of ASDEX Upgrade discharges
journal, May 2012

Trapped gyro-Landau-fluid transport modeling of DIII-D hybrid discharges
journal, December 2010

An Eulerian gyrokinetic-Maxwell solver
journal, April 2003

Tokamak profile prediction using direct gyrokinetic and neoclassical simulation
journal, June 2009

TSC simulation of Ohmic discharges in TFTR
journal, March 1993

Advances in the high bootstrap fraction regime on DIII-D towards the Q = 5 mission of ITER steady state
journal, March 2017

Physics Design of CFETR: Determination of the Device Engineering Parameters
journal, March 2014

Transport physics of ASDEX Upgrade current ramps: experiment and theory
journal, November 2010

ITER startup studies in the DIII-D tokamak
journal, November 2008

Validation of the thermal transport model used for ITER startup scenario predictions with DIII-D experimental data
journal, December 2010

The first transport code simulations using the trapped gyro-Landau-fluid model
journal, May 2008

Gyrofluid simulations of turbulence suppression in reversed-shear experiments on the Tokamak Fusion Test Reactor
journal, May 1997

Inductive flux usage and its optimization in tokamak operation
journal, July 2014

Current ramps in tokamaks: from present experiments to ITER scenarios
journal, July 2011

A stable scheme for computation of coupled transport and equilibrium equations in tokamaks
journal, February 2013

Gyro-Landau fluid equations for trapped and passing particles
journal, October 2005

An Eulerian method for the solution of the multi-species drift-kinetic equation
journal, June 2009

Predictions of the near edge transport shortfall in DIII-D L-mode plasmas using the trapped gyro-Landau-fluid model
journal, January 2015

Confinement and transport properties during current ramps in the ASDEX Upgrade tokamak
journal, March 2011

Understanding and predicting the dynamics of tokamak discharges during startup and rampdown
journal, May 2010

Application of an empirical saturation rule to TGLF to unify low- k and high- k turbulence dominated regimes
journal, November 2017

Validating the energy transport modeling of the DIII-D and EAST ramp up experiments using TSC
journal, May 2017

Multi-scale gyrokinetic simulation of tokamak plasmas: enhanced heat loss due to cross-scale coupling of plasma turbulence
journal, December 2015

A review of internal transport barrier physics for steady-state operation of tokamaks
journal, March 2004

Investigation of energy transport in DIII-D High- β _P EAST-demonstration discharges with the TGLF turbulent and NEO neoclassical transport models
journal, January 2017

A new paradigm for E × B velocity shear suppression of gyro-kinetic turbulence and the momentum pinch
journal, September 2013

Kinetic calculation of neoclassical transport including self-consistent electron and impurity dynamics
journal, July 2008

New Paradigm for Suppression of Gyrokinetic Turbulence by Velocity Shear
journal, January 2013

Novel free-boundary equilibrium and transport solver with theory-based models and its validation against ASDEX Upgrade current ramp scenarios
journal, November 2013

Resolving the mystery of transport within internal transport barriers
journal, May 2014

Compatibility of internal transport barrier with steady-state operation in the high bootstrap fraction regime on DIII-D
journal, November 2015

A theory-based transport model with comprehensive physics
journal, May 2007

Noninductive plasma initiation and startup in the DIII-D tokamak
journal, July 2011

Evaluation of CFETR as a Fusion Nuclear Science Facility using multiple system codes
journal, January 2015

Dynamical coupling between magnetic equilibrium and transport in tokamak scenario modelling, with application to current ramps
journal, June 2013

Chapter 1: Overview and summary
journal, June 2007

Full linearized Fokker–Planck collisions in neoclassical transport simulations
journal, December 2011

Simulating ITER plasma startup and rampdown scenarios in the DIII-D tokamak
journal, October 2009

Turbulent energy exchange: Calculation and relevance for profile prediction
journal, August 2013