Integrated fusion simulation with self-consistent core-pedestal coupling

O. Meneghini; P. B. Snyder; S. P. Smith; J. Candy; G. M. Staebler; E. A. Belli; L. L. Lao; J. M. Park; D. L. Green; W. Elwasif; B. A. Grierson; C. Holland

doi:10.1063/1.4947204

Integrated fusion simulation with self-consistent core-pedestal coupling

O. Meneghini, P. B. Snyder, S. P. Smith, J. Candy, G. M. Staebler, E. A. Belli, L. L. Lao, J. M. Park, D. L. Green, W. Elwasif, B. A. Grierson, C. Holland

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Abstract

Accurate prediction of fusion performance in present and future tokamaks requires taking into account the strong interplay between core transport, pedestal structure, current profile, and plasma equilibrium. An integrated modeling workflow capable of calculating the steady-state self-consistent solution to this strongly coupled problem has been developed. The workflow leverages state-of-the-art components for collisional and turbulent core transport, equilibrium and pedestal stability. Testing against a DIII-D discharge shows that the workflow is capable of robustly predicting the kinetic profiles (electron and ion temperature and electron density) from the axis to the separatrix in a good agreement with the experiments. An example application is presented, showing self-consistent optimization for the fusion performance of the 15 MA D-T ITER baseline scenario as functions of the pedestal density and ion effective charge Z_eff.

Original language	English
Article number	042507
Journal	Physics of Plasmas
Volume	23
Issue number	4
DOIs	https://doi.org/10.1063/1.4947204
State	Published - Apr 1 2016

Funding

This work was supported by the Office of Science of the U.S. Department of Energy under Contract Nos. DE-SC0012656 (GA AToM SciDAC), DE-AC05-00OR22725 (ORNL AToM SciDAC), DE-SC0012633 (UCSD AToM SciDAC), DE-FG02-95ER54309 (GA theory), DE-FC02-06ER54873 (ESL), and DE-FC02-04ER54698 (DIII-D). This research used resources of the National Energy Research Scientific Computing Center (NERSC), a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.

Funders	Funder number
DOE Office of Science	DE-AC02-05CH11231
U.S. Department of Energy	DE-AC05-00OR22725, DE-SC0012656
Office of Science
Oak Ridge National Laboratory	DE-SC0012633, DE-FC02-04ER54698, DE-FC02-06ER54873, DE-FG02-95ER54309

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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abstract = "Accurate prediction of fusion performance in present and future tokamaks requires taking into account the strong interplay between core transport, pedestal structure, current profile, and plasma equilibrium. An integrated modeling workflow capable of calculating the steady-state self-consistent solution to this strongly coupled problem has been developed. The workflow leverages state-of-the-art components for collisional and turbulent core transport, equilibrium and pedestal stability. Testing against a DIII-D discharge shows that the workflow is capable of robustly predicting the kinetic profiles (electron and ion temperature and electron density) from the axis to the separatrix in a good agreement with the experiments. An example application is presented, showing self-consistent optimization for the fusion performance of the 15 MA D-T ITER baseline scenario as functions of the pedestal density and ion effective charge Zeff.",

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AU - Meneghini, O.

AU - Snyder, P. B.

AU - Smith, S. P.

AU - Candy, J.

AU - Staebler, G. M.

AU - Belli, E. A.

AU - Lao, L. L.

AU - Park, J. M.

AU - Green, D. L.

AU - Elwasif, W.

AU - Grierson, B. A.

AU - Holland, C.

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AB - Accurate prediction of fusion performance in present and future tokamaks requires taking into account the strong interplay between core transport, pedestal structure, current profile, and plasma equilibrium. An integrated modeling workflow capable of calculating the steady-state self-consistent solution to this strongly coupled problem has been developed. The workflow leverages state-of-the-art components for collisional and turbulent core transport, equilibrium and pedestal stability. Testing against a DIII-D discharge shows that the workflow is capable of robustly predicting the kinetic profiles (electron and ion temperature and electron density) from the axis to the separatrix in a good agreement with the experiments. An example application is presented, showing self-consistent optimization for the fusion performance of the 15 MA D-T ITER baseline scenario as functions of the pedestal density and ion effective charge Zeff.

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Integrated fusion simulation with self-consistent core-pedestal coupling

Abstract

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UN SDGs

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