Integrated fusion simulation with self-consistent core-pedestal coupling

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

doi:10.1063/1.4947204

Integrated fusion simulation with self-consistent core-pedestal coupling

Journal Article · Wed Apr 20 04:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4947204· OSTI ID:1319224

Meneghini, O. ^[1]; Snyder, P. B. ^[1]; Smith, S. P. ^[1]; Candy, J. ^[1]; ^[1]; ^[1]; Lao, L. L. ^[1]; Park, J. M. ^[2]; Green, D. L. ^[2]; ^[2]; Grierson, B. A. ^[3]; Holland, C. ^[4]

General Atomics, San Diego, CA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Univ. of California, San Diego, CA (United States)

In this study, 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. Validation against DIII-D discharges shows that the workflow is capable of robustly pre- dicting the kinetic profiles (electron and ion temperature and electron density) from the axis to the separatrix in 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.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1319224

Alternate ID(s):: OSTI ID: 1248239
OSTI ID: 1372261
OSTI ID: 1489411

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 4 Vol. 23; ISSN 1070-664X; ISSN PHPAEN

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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