Transport modeling of the DIII-D high ${{\beta}_{p}}$ scenario and extrapolations to ITER steady-state operation

McClenaghan, Joseph; Garofalo, Andrea M.; Meneghini, Orso; Smith, Sterling P.; Leuer, James A.; Staebler, Gary M.; Lao, Lang L.; Park, Jin Myung; Ding, Siye Y.; Gong, Xianzu; Qian, Jinping

doi:10.1088/1741-4326/aa79ca

Title: Transport modeling of the DIII-D high $${{\beta}_{p}}$$ scenario and extrapolations to ITER steady-state operation

Journal Article · Thu Aug 03 00:00:00 EDT 2017 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/aa79ca· OSTI ID:1374040

^[1]; Garofalo, Andrea M. ^[2]; Meneghini, Orso ^[2]; Smith, Sterling P. ^[2]; Leuer, James A. ^[2]; Staebler, Gary M. ^[2]; Lao, Lang L. ^[2]; Park, Jin Myung ^[3];

^[4]; Gong, Xianzu ^[4]; Qian, Jinping ^[4]

Oak Ridge Associated Univ., Oak Ridge, TN (United States)
General Atomics, San Diego, CA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Chinese Academy of Sciences, Hefei (People's Republic of China)

In this study, transport modeling of a proposed ITER steady-state scenario based on DIII-D high poloidal-beta ($${{\beta}_{p}}$$ ) discharges finds that ITB formation can occur with either sufficient rotation or a negative central shear q-profile. The high $${{\beta}_{p}}$$ scenario is characterized by a large bootstrap current fraction (80%) which reduces the demands on the external current drive, and a large radius internal transport barrier which is associated with excellent normalized confinement. Modeling predictions of the electron transport in the high $${{\beta}_{p}}$$ scenario improve as $${{q}_{95}}$$ approaches levels similar to typical existing models of ITER steady-state and the ion transport is turbulence dominated. Typical temperature and density profiles from the non-inductive high $${{\beta}_{p}}$$ scenario on DIII-D are scaled according to 0D modeling predictions of the requirements for achieving a $Q=5$ steady-state fusion gain in ITER with 'day one' heating and current drive capabilities. Then, TGLF turbulence modeling is carried out under systematic variations of the toroidal rotation and the core q-profile. A high bootstrap fraction, high $${{\beta}_{p}}$$ scenario is found to be near an ITB formation threshold, and either strong negative central magnetic shear or rotation in a high bootstrap fraction are found to successfully provide the turbulence suppression required to achieve $Q=5$.

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

Sponsoring Organization:: USDOE

Grant/Contract Number:: FC02-04ER54698

OSTI ID:: 1374040

Journal Information:: Nuclear Fusion, Vol. 57, Issue 11; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 19 works

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References (29)

Chapter 6: Steady state operation Gormezano, C.; Sips, A. C. C.; Luce, T. C. Nuclear Fusion, Vol. 47, Issue 6 https://doi.org/10.1088/0029-5515/47/6/S06	journal	June 2007
ITER-FEAT operation Shimomura, Y.; Aymar, R.; Chuyanov, V. A. Nuclear Fusion, Vol. 41, Issue 3 https://doi.org/10.1088/0029-5515/41/3/308	journal	March 2001
Integrated modelling of steady-state scenarios and heating and current drive mixes for ITER Murakami, M.; Park, J. M.; Giruzzi, G. Nuclear Fusion, Vol. 51, Issue 10 https://doi.org/10.1088/0029-5515/51/10/103006	journal	August 2011
Critical Threshold Behavior for Steady-State Internal Transport Barriers in Burning Plasmas García, J.; Giruzzi, G.; Artaud, J. F. Physical Review Letters, Vol. 100, Issue 25 https://doi.org/10.1103/PhysRevLett.100.255004	journal	June 2008
Compatibility of internal transport barrier with steady-state operation in the high bootstrap fraction regime on DIII-D Garofalo, A. M.; Gong, X.; Grierson, B. A. Nuclear Fusion, Vol. 55, Issue 12 https://doi.org/10.1088/0029-5515/55/12/123025	journal	November 2015
Extended JT-60U plasma regimes for high integrated performance Kamada, Y.; Team, Jt-60 Nuclear Fusion, Vol. 41, Issue 10 https://doi.org/10.1088/0029-5515/41/10/302	journal	October 2001
Gyrofluid simulations of turbulence suppression in reversed-shear experiments on the Tokamak Fusion Test Reactor Beer, M. A.; Hammett, G. W.; Rewoldt, G. Physics of Plasmas, Vol. 4, Issue 5 https://doi.org/10.1063/1.872279	journal	May 1997
ITER predictions using the GYRO verified and experimentally validated trapped gyro-Landau fluid transport model Kinsey, J. E.; Staebler, G. M.; Candy, J. Nuclear Fusion, Vol. 51, Issue 8 https://doi.org/10.1088/0029-5515/51/8/083001	journal	June 2011
Integrated fusion simulation with self-consistent core-pedestal coupling Meneghini, O.; Snyder, P. B.; Smith, S. P. Physics of Plasmas, Vol. 23, Issue 4 https://doi.org/10.1063/1.4947204	journal	April 2016
Exploration of the Super H-mode regime on DIII-D and potential advantages for burning plasma devices Solomon, W. M.; Snyder, P. B.; Bortolon, A. Physics of Plasmas, Vol. 23, Issue 5 https://doi.org/10.1063/1.4944822	journal	March 2016
Confinement improvement in the high poloidal beta regime on DIII-D and application to steady-state H-mode on EAST Ding, S.; Garofalo, A. M.; Qian, J. Physics of Plasmas, Vol. 24, Issue 5 https://doi.org/10.1063/1.4982058	journal	May 2017
Tokamak profile prediction using direct gyrokinetic and neoclassical simulation Candy, J.; Holland, C.; Waltz, R. E. Physics of Plasmas, Vol. 16, Issue 6 https://doi.org/10.1063/1.3167820	journal	June 2009
Integrated modeling applications for tokamak experiments with OMFIT Meneghini, O.; Smith, S. P.; Lao, L. L. Nuclear Fusion, Vol. 55, Issue 8 https://doi.org/10.1088/0029-5515/55/8/083008	journal	July 2015
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
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
Nonlinear electromagnetic gyrokinetic equation for plasmas with large mean flows Sugama, H.; Horton, W. Physics of Plasmas, Vol. 5, Issue 7 https://doi.org/10.1063/1.872941	journal	July 1998
Variational moment solutions to the Grad–Shafranov equation Lao, L. L. Physics of Fluids, Vol. 24, Issue 8 https://doi.org/10.1063/1.863562	journal	January 1981
Multi-scale gyrokinetic simulations: Comparison with experiment and implications for predicting turbulence and transport Howard, N. T.; Holland, C.; White, A. E. Physics of Plasmas, Vol. 23, Issue 5 https://doi.org/10.1063/1.4946028	journal	April 2016
The role of zonal flows in the saturation of multi-scale gyrokinetic turbulence Staebler, G. M.; Candy, J.; Howard, N. T. Physics of Plasmas, Vol. 23, Issue 6 https://doi.org/10.1063/1.4954905	journal	June 2016
Fusion Nuclear Science Facility Candidates Stambaugh, R. D.; Chan, V. S.; Garofalo, A. M. Fusion Science and Technology, Vol. 59, Issue 2 https://doi.org/10.13182/FST59-279	journal	February 2011
Physics Basis of a Fusion Development Facility Utilizing the Tokamak Approach Chan, V. S.; Stambaugh, R. D.; Garofalo, A. M. Fusion Science and Technology, Vol. 57, Issue 1 https://doi.org/10.13182/FST10-A9269	journal	January 2010
Mission and Overview of a Fusion Development Facility Garofalo, A. M.; Chan, V. S.; Stambaugh, R. D. IEEE Transactions on Plasma Science, Vol. 38, Issue 3 https://doi.org/10.1109/TPS.2010.2040168	journal	March 2010
Neoclassical conductivity and bootstrap current formulas for general axisymmetric equilibria and arbitrary collisionality regime Sauter, O.; Angioni, C.; Lin-Liu, Y. R. Physics of Plasmas, Vol. 6, Issue 7 https://doi.org/10.1063/1.873240	journal	July 1999
Scaling of the tokamak near the scrape-off layer H-mode power width and implications for ITER Eich, T.; Leonard, A. W.; Pitts, R. A. Nuclear Fusion, Vol. 53, Issue 9 https://doi.org/10.1088/0029-5515/53/9/093031	journal	August 2013
ADX: a high field, high power density, advanced divertor and RF tokamak LaBombard, B.; Marmar, E.; Irby, J. Nuclear Fusion, Vol. 55, Issue 5 https://doi.org/10.1088/0029-5515/55/5/053020	journal	April 2015
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
A first-principles predictive model of the pedestal height and width: development, testing and ITER optimization with the EPED model Snyder, P. B.; Groebner, R. J.; Hughes, J. W. Nuclear Fusion, Vol. 51, Issue 10 https://doi.org/10.1088/0029-5515/51/10/103016	journal	August 2011
Dependence of intrinsic torque and momentum confinement on normalized gyroradius and collisionality in the DIII-D tokamak Chrystal, C.; Grierson, B. A.; Solomon, W. M. Physics of Plasmas, Vol. 24, Issue 4 https://doi.org/10.1063/1.4978563	journal	April 2017
Resolving the mystery of transport within internal transport barriers Staebler, G. M.; Kinsey, J. E.; Belli, E. A. Physics of Plasmas, Vol. 21, Issue 5 https://doi.org/10.1063/1.4875334	journal	May 2014

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Transport barriers in bootstrap-driven tokamaks Staebler, G. M.; Garofalo, A. M.; Pan, C. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5019282	journal	May 2018
Progress of physics understanding for long pulse high-performance plasmas on EAST towards the steady-state operation of ITER and CFETR Huang, J.; Gong, X.; Garofalo, A. M. Plasma Physics and Controlled Fusion, Vol. 62, Issue 1 https://doi.org/10.1088/1361-6587/ab56a5	journal	December 2019
Scaling laws from theory-based modeling for different regimes in the DEMO fusion reactor Palermo, F.; Fable, E.; Angioni, C. Nuclear Fusion, Vol. 59, Issue 9 https://doi.org/10.1088/1741-4326/ab276f	journal	July 2019
Shafranov shift bifurcation of turbulent transport in the high β _p scenario on DIII-D McClenaghan, J.; Garofalo, A. M.; Staebler, G. M. Nuclear Fusion, Vol. 59, Issue 12 https://doi.org/10.1088/1741-4326/ab4086	journal	September 2019
The dominant micro-turbulence instabilities in the lower q ₉₅ high β _p plasmas on DIII-D and predict-first extrapolation Ding, S.; Jian, X.; Garofalo, A. M. Nuclear Fusion, Vol. 60, Issue 1 https://doi.org/10.1088/1741-4326/ab5152	journal	November 2019

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