The spectral basis of optimal error field correction on DIII-D

Paz-Soldan, Carlos A.; Buttery, Richard J.; Garofalo, Andrea M.; Hanson, Jeremy M.; La Haye, Robert J.; Lanctot, Matthew J.; Park, Jong -Ku; Solomon, Wayne M.; Strait, Edward J.

doi:10.1088/0029-5515/54/7/073013

Title: The spectral basis of optimal error field correction on DIII-D

Journal Article · Mon Apr 28 00:00:00 EDT 2014 · Nuclear Fusion

DOI:https://doi.org/10.1088/0029-5515/54/7/073013· OSTI ID:1354748

Paz-Soldan, Carlos A. ^[1]; Buttery, Richard J. ^[2]; Garofalo, Andrea M. ^[2]; Hanson, Jeremy M. ^[3]; La Haye, Robert J. ^[2]; Lanctot, Matthew J. ^[2]; Park, Jong -Ku ^[4]; Solomon, Wayne M. ^[4]; Strait, Edward J. ^[2]

Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States)
General Atomics, San Diego, CA (United States)
Columbia Univ., New York, NY (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Here, experimental optimum error field correction (EFC) currents found in a wide breadth of dedicated experiments on DIII-D are shown to be consistent with the currents required to null the poloidal harmonics of the vacuum field which drive the kink mode near the plasma edge. This allows the identification of empirical metrics which predict optimal EFC currents with accuracy comparable to that of first- principles modeling which includes the ideal plasma response. While further metric refinements are desirable, this work suggests optimal EFC currents can be effectively fed-forward based purely on knowledge of the vacuum error field and basic equilibrium properties which are routinely calculated in real-time.

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Research Organization:: General Atomics, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: FC02-04ER54698

OSTI ID:: 1354748

Journal Information:: Nuclear Fusion, Vol. 54, Issue 7; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 38 works

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Equilibrium drives of the low and high field side n = 2 plasma response and impact on global confinement Paz-Soldan, C.; Logan, N. C.; Haskey, S. R. Nuclear Fusion, Vol. 56, Issue 5 https://doi.org/10.1088/0029-5515/56/5/056001	journal	April 2016
Magnetic polarization measurements of the multi-modal plasma response to 3D fields in the EAST tokamak Logan, N. C.; Cui, L.; Wang, H. Nuclear Fusion, Vol. 58, Issue 7 https://doi.org/10.1088/1741-4326/aac129	journal	May 2018
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Title: The spectral basis of optimal error field correction on DIII-D

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