Implementation of the 3D edge plasma code EMC3-EIRENE on NSTX

Lore, J. D.; Canik, J. M.; Feng, Y.; Ahn, J. -W.; Maingi, R.; Soukhanovskii, V.

doi:10.1088/0029-5515/52/5/054012

Title: Implementation of the 3D edge plasma code EMC3-EIRENE on NSTX

Journal Article · Wed May 09 00:00:00 EDT 2012 · Nuclear Fusion

DOI:https://doi.org/10.1088/0029-5515/52/5/054012· OSTI ID:1239217

Lore, J. D. ^[1]; Canik, J. M. ^[2]; Feng, Y. ^[3]; Ahn, J. -W. ^[2]; Maingi, R. ^[2]; Soukhanovskii, V. ^[4]

Oak Ridge Institute for Science and Education, Oak Ridge, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Max-Planck-Institut fur Plasmaphysik, Greifswald (Germany)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

The 3D edge transport code EMC3-EIRENE has been applied for the first time to the NSTX spherical tokamak. A new disconnected double null grid has been developed to allow the simulation of plasma where the radial separation of the inner and outer separatrix is less than characteristic widths (e.g. heat flux width) at the midplane. Modelling results are presented for both an axisymmetric case and a case where 3D magnetic field is applied in an n = 3 configuration. In the vacuum approximation, the perturbed field consists of a wide region of destroyed flux surfaces and helical lobes which are a mixture of long and short connection length field lines formed by the separatrix manifolds. This structure is reflected in coupled 3D plasma fluid (EMC3) and kinetic neutral particle (EIRENE) simulations. The helical lobes extending inside of the unperturbed separatrix are filled in by hot plasma from the core. The intersection of the lobes with the divertor results in a striated flux footprint pattern on the target plates. As a result, profiles of divertor heat and particle fluxes are compared with experimental data, and possible sources of discrepancy are discussed.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1239217

Report Number(s):: LLNL-JRNL-489125; TRN: US1600616

Journal Information:: Nuclear Fusion, Vol. 52, Issue 5; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 31 works

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Impact of screening of resonant magnetic perturbations in three dimensional edge plasma transport simulations for DIII-D Frerichs, H.; Reiter, D.; Schmitz, O. Physics of Plasmas, Vol. 19, Issue 5 https://doi.org/10.1063/1.4714616	journal	May 2012
Exploration of magnetic perturbation effects on advanced divertor configurations in NSTX-U Frerichs, H.; Schmitz, O.; Waters, I. Physics of Plasmas, Vol. 23, Issue 6, Article No. 062517 https://doi.org/10.1063/1.4954816	journal	June 2016

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