EMC3-EIRENE modelling of toroidally-localized divertor gas injection experiments on Alcator C-Mod

Lore, Jeremy D.; Reinke, M. L.; LaBombard, Brian; Lipschultz, B.; Churchill, R. M.; Pitts, R. A.; Feng, Y.

doi:10.1016/j.jnucmat.2014.09.053

Title: EMC3-EIRENE modelling of toroidally-localized divertor gas injection experiments on Alcator C-Mod

Journal Article · Tue Sep 30 00:00:00 EDT 2014 · Journal of Nuclear Materials

DOI:https://doi.org/10.1016/j.jnucmat.2014.09.053· OSTI ID:1286776

Lore, Jeremy D. ^[1]; Reinke, M. L. ^[2]; LaBombard, Brian ^[3]; Lipschultz, B. ^[2]; Churchill, R. M. ^[3]; Pitts, R. A. ^[4]; Feng, Y. ^[5]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of York (United Kingdom). York Plasma Inst., Dept. of Physics
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
ITER Organization, St. Paul Lez Durance (France)
Max Planck Inst. for Plasma Physics, Garching (Germany)

Experiments on Alcator C-Mod with toroidally and poloidally localized divertor nitrogen injection have been modeled using the three-dimensional edge transport code EMC3-EIRENE to elucidate the mechanisms driving measured toroidal asymmetries. In these experiments five toroidally distributed gas injectors in the private flux region were sequentially activated in separate discharges resulting in clear evidence of toroidal asymmetries in radiated power and nitrogen line emission as well as a ~50% toroidal modulation in electron pressure at the divertor target. The pressure modulation is qualitatively reproduced by the modelling, with the simulation yielding a toroidal asymmetry in the heat flow to the outer strike point. Finally, toroidal variation in impurity line emission is qualitatively matched in the scrape-off layer above the strike point, however kinetic corrections and cross-field drifts are likely required to quantitatively reproduce impurity behavior in the private flux region and electron temperatures and densities directly in front of the target.

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

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725; FC02-99ER54512

OSTI ID:: 1286776

Journal Information:: Journal of Nuclear Materials, Vol. 463; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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References (12)

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Cited By (3)

Investigation of edge impurity transport and divertor fluxes by toroidally localized lithium injection on EAST with EMC3-EIRENE Xie, T.; Dai, S. Y.; Sun, Z. Plasma Physics and Controlled Fusion, Vol. 61, Issue 11 https://doi.org/10.1088/1361-6587/ab434a	journal	October 2019
3D effects of neon injection positions on the toroidally symmetric/asymmetric heat flux distribution on EAST Liu, B.; Dai, S. Y.; Kawamura, G. Plasma Physics and Controlled Fusion, Vol. 62, Issue 3 https://doi.org/10.1088/1361-6587/ab6072	journal	January 2020
EMC3-EIRENE modelling of edge plasma and impurity emissions compared with the liquid lithium limiter experiment on EAST Xie, T.; Dai, S. Y.; Zuo, G. Z. Nuclear Fusion, Vol. 58, Issue 10 https://doi.org/10.1088/1741-4326/aad42f	journal	August 2018

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