3D equilibrium reconstruction with islands

Cianciosa, M.; Hirshman, S. P.; Seal, S. K.; Shafer, M. W.

doi:10.1088/1361-6587/aaaf90

Title: 3D equilibrium reconstruction with islands

Journal Article · Thu Feb 15 00:00:00 EST 2018 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/1361-6587/aaaf90· OSTI ID:1424449

^[1]; Hirshman, S. P. ^[1]; Seal, S. K. ^[1];

^[1]

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

This study presents the development of a 3D equilibrium reconstruction tool and the results of the first-ever reconstruction of an island equilibrium. The SIESTA non-nested equilibrium solver has been coupled to the V3FIT 3D equilibrium reconstruction code. Computed from a coupled VMEC and SIESTA model, synthetic signals are matched to measured signals by finding an optimal set of equilibrium parameters. By using the normalized pressure in place of normalized flux, non-equilibrium quantities needed by diagnostic signals can be efficiently mapped to the equilibrium. The effectiveness of this tool is demonstrated by reconstructing an island equilibrium of a DIII-D inner wall limited L-mode case with an n = 1 error field applied. Finally, flat spots in Thomson and ECE temperature diagnostics show the reconstructed islands have the correct size and phase.

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

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: AC05-00OR22725; AC02-05CH11231; FG02-04ER54761; FC02-04ER54698

OSTI ID:: 1424449

Journal Information:: Plasma Physics and Controlled Fusion, Vol. 60, Issue 4; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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