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Title: Integrated fusion simulation with self-consistent core-pedestal coupling

Abstract

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.

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [2];  [2]; ORCiD logo [2];  [3];  [4]
  1. General Atomics, San Diego, CA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  4. Univ. of California, San Diego, CA (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1319224
Alternate Identifier(s):
OSTI ID: 1248239; OSTI ID: 1372261; OSTI ID: 1489411
Grant/Contract Number:  
AC05-00OR22725; FC02-06ER54873; AC02-05CH11231; FC02-04ER54698; FG02-95ER54309; SC0012633; SC0012656
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; 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; plasma transport properties; turbulence simulations; turbulent transport processes; plasma pressure; plasma temperature

Citation Formats

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., and Holland, C. Integrated fusion simulation with self-consistent core-pedestal coupling. United States: N. p., 2016. Web. doi:10.1063/1.4947204.
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. Integrated fusion simulation with self-consistent core-pedestal coupling. United States. doi:10.1063/1.4947204.
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., and Holland, C. Wed . "Integrated fusion simulation with self-consistent core-pedestal coupling". United States. doi:10.1063/1.4947204. https://www.osti.gov/servlets/purl/1319224.
@article{osti_1319224,
title = {Integrated fusion simulation with self-consistent core-pedestal coupling},
author = {Meneghini, O. and Snyder, P. B. and Smith, S. P. and Candy, J. and Staebler, G. M. and Belli, E. A. and Lao, L. L. and Park, J. M. and Green, D. L. and Elwasif, W. and Grierson, B. A. and Holland, C.},
abstractNote = {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 Zeff.},
doi = {10.1063/1.4947204},
journal = {Physics of Plasmas},
number = 4,
volume = 23,
place = {United States},
year = {2016},
month = {4}
}

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Cited by: 6 works
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Figures / Tables:

FIG. 1 FIG. 1: a) Self-consistent prediction of the electron temperature profile and comparison with the experimental measurements for a DIII-D discharge. Self-consistency is achieved by means of an iterative workflow in which the global pressure that is input to the pedestal model (EPED1) is updated based on the core-transport prediction (TGYRO)more » at the previous step. b) The solution is unique, with the initial guess of the normalized pressure βN having little effect on the final profile.« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.