A new stabilizing regime of tearing mode entrainment in the presence of a static error field
Abstract
Uncorrected static error fields (EFs) in axisymmetric fusion devices are one of the few remaining serious obstacles for advancing the present tokamak-based approach to a practical reactor. Magnetohydrodynamic tearing modes (TMs) lock to them, causing sudden losses of confinement known as disruptions. Recently, a hypothesis has been proposed that there may exist a self-healing stable regime in which a static resonant EF is effectively shielded by forcing these TMs to slowly rotate inductively by the applied non-axisymmetric field (Inoue et al 2017 Nucl. Fusion 57 116020; Inoue et al 2018 Plasma. Phys. Control. Fusion 60 025003; Inoue et al 2018 Preprint: 2018 IAEA Fusion Energy Conf. TH/P4-24). This is based on non-linear, resistive, reduced magnetohydrodynamic simulations using a cylindrical single helicity model. Proof-of-principle experiments in the DIII-D device showed that the magnetic mode structure on the plasma surface is qualitatively consistent with the simulation prediction. However, radial mode profiles revealed qualitatively different behavior. This led to a revised hypothesis that in actual non-circular toroidal devices, a tearing layer in forced rotation induces a shielding process at other rational surfaces when we take into account multiple resonant Fourier components. The time evolution experiment of the radial penetration is supportive of thismore »
- Authors:
-
[2];
[1];
[1];
[4];
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- National Inst. for Quantum and Radiological Science and Technology, Ibaraki (Japan)
- Oak Ridge Association Univ., Oak Ridge, TN (United States)
- General Atomics, San Diego, CA (United States)
- Columbia Univ., New York, NY (United States)
- Massachusetts Inst. of Technology, MA (United States). Lab. for Nuclear Science
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- General Atomics, San Diego, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1568810
- Alternate Identifier(s):
- OSTI ID: 1570111
- Grant/Contract Number:
- FC02-04ER54698; AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Fusion
- Additional Journal Information:
- Journal Volume: 59; Journal Issue: 12; Journal ID: ISSN 0029-5515
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; tearing mode locking; disruption; bifurcation
Citation Formats
Okabayashi, M., Inoue, S., Logan, N. C., Taylor, N. Z., Strait, E. J., de Grassie, J., Ferraro, N., Hanson, J., Jardin, S., La Haye, R. J., Liu, Y. Q., Paz-Soldan, C., Sugiyama, L., and Wingen, A. A new stabilizing regime of tearing mode entrainment in the presence of a static error field. United States: N. p., 2019.
Web. doi:10.1088/1741-4326/ab37d2.
Okabayashi, M., Inoue, S., Logan, N. C., Taylor, N. Z., Strait, E. J., de Grassie, J., Ferraro, N., Hanson, J., Jardin, S., La Haye, R. J., Liu, Y. Q., Paz-Soldan, C., Sugiyama, L., & Wingen, A. A new stabilizing regime of tearing mode entrainment in the presence of a static error field. United States. https://doi.org/10.1088/1741-4326/ab37d2
Okabayashi, M., Inoue, S., Logan, N. C., Taylor, N. Z., Strait, E. J., de Grassie, J., Ferraro, N., Hanson, J., Jardin, S., La Haye, R. J., Liu, Y. Q., Paz-Soldan, C., Sugiyama, L., and Wingen, A. Mon .
"A new stabilizing regime of tearing mode entrainment in the presence of a static error field". United States. https://doi.org/10.1088/1741-4326/ab37d2. https://www.osti.gov/servlets/purl/1568810.
@article{osti_1568810,
title = {A new stabilizing regime of tearing mode entrainment in the presence of a static error field},
author = {Okabayashi, M. and Inoue, S. and Logan, N. C. and Taylor, N. Z. and Strait, E. J. and de Grassie, J. and Ferraro, N. and Hanson, J. and Jardin, S. and La Haye, R. J. and Liu, Y. Q. and Paz-Soldan, C. and Sugiyama, L. and Wingen, A.},
abstractNote = {Uncorrected static error fields (EFs) in axisymmetric fusion devices are one of the few remaining serious obstacles for advancing the present tokamak-based approach to a practical reactor. Magnetohydrodynamic tearing modes (TMs) lock to them, causing sudden losses of confinement known as disruptions. Recently, a hypothesis has been proposed that there may exist a self-healing stable regime in which a static resonant EF is effectively shielded by forcing these TMs to slowly rotate inductively by the applied non-axisymmetric field (Inoue et al 2017 Nucl. Fusion 57 116020; Inoue et al 2018 Plasma. Phys. Control. Fusion 60 025003; Inoue et al 2018 Preprint: 2018 IAEA Fusion Energy Conf. TH/P4-24). This is based on non-linear, resistive, reduced magnetohydrodynamic simulations using a cylindrical single helicity model. Proof-of-principle experiments in the DIII-D device showed that the magnetic mode structure on the plasma surface is qualitatively consistent with the simulation prediction. However, radial mode profiles revealed qualitatively different behavior. This led to a revised hypothesis that in actual non-circular toroidal devices, a tearing layer in forced rotation induces a shielding process at other rational surfaces when we take into account multiple resonant Fourier components. The time evolution experiment of the radial penetration is supportive of this hypothesis.},
doi = {10.1088/1741-4326/ab37d2},
journal = {Nuclear Fusion},
number = 12,
volume = 59,
place = {United States},
year = {Mon Sep 30 00:00:00 EDT 2019},
month = {Mon Sep 30 00:00:00 EDT 2019}
}
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Works referenced in this record:
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
Active stabilization of error field penetration via control field and bifurcation of its stable frequency range
journal, August 2017
- Inoue, S.; Shiraishi, J.; Takechi, M.
- Nuclear Fusion, Vol. 57, Issue 11
Measurement of the electromagnetic torque in rotating DIII-D plasmas
journal, March 2010
- Logan, N. C.; Strait, E. J.; Reimerdes, H.
- Plasma Physics and Controlled Fusion, Vol. 52, Issue 4
Steepest-descent moment method for three-dimensional magnetohydrodynamic equilibria
journal, January 1983
- Hirshman, S. P.
- Physics of Fluids, Vol. 26, Issue 12
Effect of resonant magnetic perturbations on COMPASS-C tokamak discharges
journal, December 1992
- Hender, T. C.; Fitzpatrick, R.; Morris, A. W.
- Nuclear Fusion, Vol. 32, Issue 12
Avoiding Tokamak Disruptions by Applying Static Magnetic Fields That Align Locked Modes with Stabilizing Wave-Driven Currents
journal, October 2015
- Volpe, F. A.; Hyatt, A.; La Haye, R. J.
- Physical Review Letters, Vol. 115, Issue 17
Stabilization of the resistive wall mode using a fake rotating shell
journal, July 1996
- Fitzpatrick, Richard; Jensen, Torkil H.
- Physics of Plasmas, Vol. 3, Issue 7
Interaction of tearing modes with external structures in cylindrical geometry (plasma)
journal, July 1993
- Fitzpatrick, R.
- Nuclear Fusion, Vol. 33, Issue 7
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
Bifurcated states of a rotating tokamak plasma in the presence of a static error-field
journal, September 1998
- Fitzpatrick, Richard
- Physics of Plasmas, Vol. 5, Issue 9
The rotating wall effect on the error field induced torque and the error field shielding in tokamaks
journal, March 2009
- Pustovitov, V. D.
- Nuclear Fusion, Vol. 49, Issue 4
An active feedback recovery technique from disruption events induced by m = 2, n = 1 tearing modes in ohmically heated tokamak plasmas
journal, March 2015
- Zanca, P.; Paccagnella, R.; Finotti, C.
- Nuclear Fusion, Vol. 55, Issue 4
Avoidance of tearing mode locking with electro-magnetic torque introduced by feedback-based mode rotation control in DIII-D and RFX-mod
journal, November 2016
- Okabayashi, M.; Zanca, P.; Strait, E. J.
- Nuclear Fusion, Vol. 57, Issue 1
Active control of 2/1 magnetic islands in a tokamak
journal, May 1998
- Navratil, G. A.; Cates, C.; Mauel, M. E.
- Physics of Plasmas, Vol. 5, Issue 5
Advanced techniques for neoclassical tearing mode control in DIII-D
journal, October 2009
- Volpe, F. A. G.; Austin, M. E.; La Haye, R. J.
- Physics of Plasmas, Vol. 16, Issue 10
Feedback stabilization of disruption precursors in a tokamak
journal, March 1990
- Morris, A. W.; Hender, T. C.; Hugill, J.
- Physical Review Letters, Vol. 64, Issue 11
Effect of an external helical field on a rotating magnetic island
journal, November 1992
- Kurita, G.; Tuda, T.; Azumi, M.
- Nuclear Fusion, Vol. 32, Issue 11
Chapter 3: MHD stability, operational limits and disruptions
journal, June 2007
- Hender, T. C.; Wesley, J. C.; Bialek, J.
- Nuclear Fusion, Vol. 47, Issue 6
A rotating shell and stabilization of the tokamak resistive wall mode
journal, December 2000
- Gimblett, C. G.; Hastie, R. J.
- Physics of Plasmas, Vol. 7, Issue 12
Dependence of locked mode behavior on frequency and polarity of a rotating external magnetic perturbation
journal, November 2017
- Inoue, S.; Shiraishi, J.; Takechi, M.
- Plasma Physics and Controlled Fusion, Vol. 60, Issue 2
Avoiding Tokamak disruptions by applying static magnetic fields that align locked modes with stabilizing wave-driven currents
text, January 2015
- Volpe, F. A.; Hyatt, A.; La Haye, R. J.
- arXiv
Works referencing / citing this record:
27th IAEA Fusion Energy Conference: summary of sessions EX/C, EX/S and PPC
journal, January 2020
- Campbell, D. J.
- Nuclear Fusion, Vol. 60, Issue 2