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Title: Modeling and Preparation for Experimental Testing of Heat Fluxes on W7-X Divertor Scraper Elements

Simulations of heat fluxes to the plasma facing components in the Wendelstein 7-X stellarator will be tested in its next operational phase. The simulations consist of core transport calculations that determine the evolution of the kinetic profiles and the toroidal current, which modifies the fluxes to the divertor, as the magnetic geometry changes. An additional divertor component, the scraper element, was designed to protect the edges of the primary divertor throughout this evolution during certain high-power long-pulse operational scenarios. The effect of unknown parameters of the heat flux calculations, namely, the cross-field thermal diffusivity and the magnetic field structure, is explored. The predicted scaling of the heat flux widths and magnitudes is presented, along with a new method of calculating the 3-D magnetic field structure required to perform the flux calculations.
Authors:
ORCiD logo [1] ; ORCiD logo [1] ;  [2] ; ORCiD logo [3] ;  [3] ; ORCiD logo [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Wisconsin, Madison, WI (United States)
  3. Max Planck Institute for Plasma Physics, Greifswald (Germany)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Plasma Science
Additional Journal Information:
Journal Volume: 46; Journal Issue: 5; Journal ID: ISSN 0093-3813
Publisher:
IEEE
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Fusion reactors; plasma simulation; plasma transport processes; Wendelstein 7-X (W7-X)
OSTI Identifier:
1488732

Lore, Jeremy D., Cianciosa, Mark R., Frerichs, Heinke, Geiger, J., Hoelbe, H., and Boscary, J.. Modeling and Preparation for Experimental Testing of Heat Fluxes on W7-X Divertor Scraper Elements. United States: N. p., Web. doi:10.1109/TPS.2017.2780624.
Lore, Jeremy D., Cianciosa, Mark R., Frerichs, Heinke, Geiger, J., Hoelbe, H., & Boscary, J.. Modeling and Preparation for Experimental Testing of Heat Fluxes on W7-X Divertor Scraper Elements. United States. doi:10.1109/TPS.2017.2780624.
Lore, Jeremy D., Cianciosa, Mark R., Frerichs, Heinke, Geiger, J., Hoelbe, H., and Boscary, J.. 2017. "Modeling and Preparation for Experimental Testing of Heat Fluxes on W7-X Divertor Scraper Elements". United States. doi:10.1109/TPS.2017.2780624. https://www.osti.gov/servlets/purl/1488732.
@article{osti_1488732,
title = {Modeling and Preparation for Experimental Testing of Heat Fluxes on W7-X Divertor Scraper Elements},
author = {Lore, Jeremy D. and Cianciosa, Mark R. and Frerichs, Heinke and Geiger, J. and Hoelbe, H. and Boscary, J.},
abstractNote = {Simulations of heat fluxes to the plasma facing components in the Wendelstein 7-X stellarator will be tested in its next operational phase. The simulations consist of core transport calculations that determine the evolution of the kinetic profiles and the toroidal current, which modifies the fluxes to the divertor, as the magnetic geometry changes. An additional divertor component, the scraper element, was designed to protect the edges of the primary divertor throughout this evolution during certain high-power long-pulse operational scenarios. The effect of unknown parameters of the heat flux calculations, namely, the cross-field thermal diffusivity and the magnetic field structure, is explored. The predicted scaling of the heat flux widths and magnitudes is presented, along with a new method of calculating the 3-D magnetic field structure required to perform the flux calculations.},
doi = {10.1109/TPS.2017.2780624},
journal = {IEEE Transactions on Plasma Science},
number = 5,
volume = 46,
place = {United States},
year = {2017},
month = {12}
}