Numerical optimization of three-dimensional coils for NSTX-U
Abstract
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.
- Authors:
-
[1];
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Columbia Univ., New York, NY (United States)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1255635
- Alternate Identifier(s):
- OSTI ID: 1238861
- Report Number(s):
- PPPL-5181
Journal ID: ISSN 0741-3335
- Grant/Contract Number:
- AC02-09CH11466
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Plasma Physics and Controlled Fusion
- Additional Journal Information:
- Journal Volume: 57; Journal Issue: 10; Journal ID: ISSN 0741-3335
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; tokamak; equilibrium; optimization; torque; rotation; in-vessel coils
Citation Formats
Lazerson, S. A., Park, J. -K., Logan, N., and Boozer, A. Numerical optimization of three-dimensional coils for NSTX-U. United States: N. p., 2015.
Web. doi:10.1088/0741-3335/57/10/104001.
Lazerson, S. A., Park, J. -K., Logan, N., & Boozer, A. Numerical optimization of three-dimensional coils for NSTX-U. United States. https://doi.org/10.1088/0741-3335/57/10/104001
Lazerson, S. A., Park, J. -K., Logan, N., and Boozer, A. Thu .
"Numerical optimization of three-dimensional coils for NSTX-U". United States. https://doi.org/10.1088/0741-3335/57/10/104001. https://www.osti.gov/servlets/purl/1255635.
@article{osti_1255635,
title = {Numerical optimization of three-dimensional coils for NSTX-U},
author = {Lazerson, S. A. and Park, J. -K. and Logan, N. and Boozer, A.},
abstractNote = {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.},
doi = {10.1088/0741-3335/57/10/104001},
journal = {Plasma Physics and Controlled Fusion},
number = 10,
volume = 57,
place = {United States},
year = {Thu Sep 03 00:00:00 EDT 2015},
month = {Thu Sep 03 00:00:00 EDT 2015}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Cited by: 6 works
Citation information provided by
Web of Science
Web of Science
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Overview of the physics and engineering design of NSTX upgrade
journal, July 2012
- Menard, J. E.; Gerhardt, S.; Bell, M.
- Nuclear Fusion, Vol. 52, Issue 8
Physics issues of compact drift optimized stellarators
journal, June 2001
- Spong, D. A.; Hirshman, S. P.; Berry, L. A.
- Nuclear Fusion, Vol. 41, Issue 6
Steepest-descent moment method for three-dimensional magnetohydrodynamic equilibria
journal, January 1983
- Hirshman, S. P.
- Physics of Fluids, Vol. 26, Issue 12
Computation of three-dimensional tokamak and spherical torus equilibria
journal, May 2007
- Park, Jong-kyu; Boozer, Allen H.; Glasser, Alan H.
- Physics of Plasmas, Vol. 14, Issue 5
Neoclassical toroidal viscosity in perturbed equilibria with general tokamak geometry
journal, December 2013
- Logan, Nikolas C.; Park, Jong-Kyu; Kim, Kimin
- Physics of Plasmas, Vol. 20, Issue 12
Critical error fields for locked mode instability in tokamaks
journal, March 1992
- La Haye, R. J.; Fitzpatrick, R.; Hender, T. C.
- Physics of Fluids B: Plasma Physics, Vol. 4, Issue 7
Using external coils to correct field errors in tokamaks
journal, January 1999
- Hanson, J. D.
- IEEE Transactions on Plasma Science, Vol. 27, Issue 6
Correcting small magnetic field non-axisymmetries
journal, March 1994
- Hanson, J. D.
- Nuclear Fusion, Vol. 34, Issue 3
The resistive wall mode and feedback control physics design in NSTX
journal, March 2004
- Sabbagh, S. A.; Bialek, J. M.; Bell, R. E.
- Nuclear Fusion, Vol. 44, Issue 4
Investigation of resistive wall mode stabilization physics in high-beta plasmas using applied non-axisymmetric fields in NSTX
journal, August 2007
- Sontag, A. C.; Sabbagh, S. A.; Zhu, W.
- Nuclear Fusion, Vol. 47, Issue 8
Resistive wall mode stabilization with internal feedback coils in DIII-D
journal, May 2004
- Strait, E. J.; Bialek, J. M.; Bogatu, I. N.
- Physics of Plasmas, Vol. 11, Issue 5
RMP ELM suppression in DIII-D plasmas with ITER similar shapes and collisionalities
journal, January 2008
- Evans, T. E.; Fenstermacher, M. E.; Moyer, R. A.
- Nuclear Fusion, Vol. 48, Issue 2
Edge stability and transport control with resonant magnetic perturbations in collisionless tokamak plasmas
journal, May 2006
- Evans, Todd E.; Moyer, Richard A.; Burrell, Keith H.
- Nature Physics, Vol. 2, Issue 6
The physics of large and small edge localized modes
journal, May 2000
- Suttrop, W.
- Plasma Physics and Controlled Fusion, Vol. 42, Issue 5A
Characteristics of type I ELM energy and particle losses in existing devices and their extrapolation to ITER
journal, August 2003
- Loarte, A.; Saibene, G.; Sartori, R.
- Plasma Physics and Controlled Fusion, Vol. 45, Issue 9
Error Field Amplification and Rotation Damping in Tokamak Plasmas
journal, May 2001
- Boozer, Allen H.
- Physical Review Letters, Vol. 86, Issue 22
Influence of the dynamic ergodic divertor on transport properties in TEXTOR
journal, June 2007
- Finken, K. H.; Unterberg, B.; Xu, Y.
- Nuclear Fusion, Vol. 47, Issue 7
Solution of stellarator boundary value problems with external currents
journal, May 1987
- Merkel, P.
- Nuclear Fusion, Vol. 27, Issue 5
Designing Coils for Compact Stellarators
journal, March 2002
- Strickler, Dennis J.; Berry, Lee A.; Hirshman, Steven P.
- Fusion Science and Technology, Vol. 41, Issue 2
3D magnetic fields and plasma rotation in RFX-mod tokamak plasmas
journal, September 2013
- Piron, L.; Bonfiglio, D.; Piovesan, P.
- Nuclear Fusion, Vol. 53, Issue 11
Ideal MHD stability calculations in axisymmetric toroidal coordinate systems
journal, January 1983
- Grimm, R. C.; Dewar, R. L.; Manickam, J.
- Journal of Computational Physics, Vol. 49, Issue 1
Adiabatic invariants and the equilibrium of magnetically trapped particles
journal, February 1967
- Hastie, R. J.; Taylor, J. B.; Haas, F. A.
- Annals of Physics, Vol. 41, Issue 2
Nonambipolar Transport by Trapped Particles in Tokamaks
journal, February 2009
- Park, Jong-kyu; Boozer, Allen H.; Menard, Jonathan E.
- Physical Review Letters, Vol. 102, Issue 6
The solution of nonlinear inverse problems and the Levenberg-Marquardt method
journal, July 2007
- Pujol, Jose
- GEOPHYSICS, Vol. 72, Issue 4
Particle swarm optimization: An overview
journal, August 2007
- Poli, Riccardo; Kennedy, James; Blackwell, Tim
- Swarm Intelligence, Vol. 1, Issue 1
The importance of matched poloidal spectra to error field correction in DIII-D
journal, July 2014
- Paz-Soldan, C.; Lanctot, M. J.; Logan, N. C.
- Physics of Plasmas, Vol. 21, Issue 7
Study of in-vessel nonaxisymmetric ELM suppression coil concepts for ITER
journal, January 2008
- Schaffer, M. J.; Menard, J. E.; Aldan, M. P.
- Nuclear Fusion, Vol. 48, Issue 2
Works referencing / citing this record:
Mitigation of Alfvénic activity by 3D magnetic perturbations on NSTX
journal, July 2016
- Kramer, G. J.; Bortolon, A.; Ferraro, N. M.
- Plasma Physics and Controlled Fusion, Vol. 58, Issue 8
Magnetic polarization measurements of the multi-modal plasma response to 3D fields in the EAST tokamak
journal, May 2018
- Logan, N. C.; Cui, L.; Wang, H.
- Nuclear Fusion, Vol. 58, Issue 7