Numerical optimization of three-dimensional coils for NSTX-U

Lazerson, S. A.; Park, J. -K.; Logan, N.; Boozer, A.

doi:10.1088/0741-3335/57/10/104001

Title: Numerical optimization of three-dimensional coils for NSTX-U

Journal Article · Thu Sep 03 00:00:00 EDT 2015 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/0741-3335/57/10/104001· OSTI ID:1255635

^[1]; Park, J. -K. ^[1]; Logan, N. ^[1]; Boozer, A. ^[2]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Columbia Univ., New York, NY (United States)

A tool for the calculation of optimal three-dimensional (3D) perturbative magnetic fields in tokamaks has been developed. The IPECOPT code builds upon the stellarator optimization code STELLOPT to allow for optimization of linear ideal magnetohydrodynamic perturbed equilibrium (IPEC). This tool has been applied to NSTX-U equilibria, addressing which fields are the most effective at driving NTV torques. The NTV torque calculation is performed by the PENT code. Optimization of the normal field spectrum shows that fields with n = 1 character can drive a large core torque. It is also shown that fields with n = 3 features are capable of driving edge torque and some core torque. Coil current optimization (using the planned in-vessel and existing RWM coils) on NSTX-U suggest the planned coils set is adequate for core and edge torque control. In conclusion, comparison between error field correction experiments on DIII-D and the optimizer show good agreement.

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Research Organization:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

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

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1255635

Alternate ID(s):: OSTI ID: 1238861

Report Number(s):: PPPL-5181

Journal Information:: Plasma Physics and Controlled Fusion, Vol. 57, Issue 10; 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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Mitigation of Alfvénic activity by 3D magnetic perturbations on NSTX Kramer, G. J.; Bortolon, A.; Ferraro, N. M. Plasma Physics and Controlled Fusion, Vol. 58, Issue 8 https://doi.org/10.1088/0741-3335/58/8/085003	journal	July 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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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
tokamak
equilibrium
optimization
torque
rotation
in-vessel coils

Title: Numerical optimization of three-dimensional coils for NSTX-U

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