Dynamics of MHD instabilities near a ferromagnetic wall

Hughes, P. E.; Levesque, J. P.; Navratil, G. A.

doi:10.1088/1741-4326/aade58

Title: Dynamics of MHD instabilities near a ferromagnetic wall

Journal Article · 24 September 2018 · Nuclear Fusion

DOI: https://doi.org/10.1088/1741-4326/aade58 · OSTI ID:1485135

^[1]; Levesque, J. P.; Navratil, G. A.

Columbia University

Prospective fusion component testing and DEMO power reactor concepts are expected to employ low-activation ferritic steels because of their ability to withstand the high neutron flux of the reactor environment. However, theory suggests that ferromagnetic material may amplify certain external MHD instabilities. Using its ferromagnetic-resistive wall mode (FRWM) upgrade, the High Beta Tokamak-Extended Pulse (HBT-EP) experiment has observed approximately doubled growth rates when operating with a close-fitting ferromagnetic first wall, compared to operation with a stainless steel first wall. The presence of a ferromagnetic wall correlates with earlier disruptions, and FRWM growth rates increase with decreasing mode rotation, as expected due to the increased skin depth allowing greater mode interaction with the bulk ferromagnetic material. It is also seen that introducing low-n asymmetries into the toroidal distribution of ferromagnetic material, similar to the ITER test blanket module toroidal asymmetry, changes the phase preference of rotating modes; meanwhile, a similar change in purely conducting material does not significantly change the mode's phase preference.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Columbia Univ., New York, NY (United States)

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

Grant/Contract Number:: FG02-86ER53222

OSTI ID:: 1485135

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 12 Vol. 58; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

References (27)

Low-activation ferritic and martensitic steels for fusion application Kohyama, A.; Hishinuma, A.; Gelles, D. S. Journal of Nuclear Materials, Vol. 233-237 https://doi.org/10.1016/S0022-3115(96)00327-3	journal	October 1996
Evaluation of magnetic fields due to the ferromagnetic vacuum vessel and their influence on plasma discharge in tokamak devices Nakayama, T.; Abe, M.; Tadokoro, T. Journal of Nuclear Materials, Vol. 271-272 https://doi.org/10.1016/S0022-3115(98)00806-X	journal	May 1999
Preparation of interfaces in ITER for integrating the Test Blanket Systems Giancarli, L.; Bede, O.; Beloglazov, S. Fusion Engineering and Design, Vol. 85, Issue 10-12 https://doi.org/10.1016/j.fusengdes.2010.06.005	journal	December 2010
Analysis of the impacts of the J-TEXT TBM mock-up on the equilibrium magnetic field Zhang, Zhengqing; Rao, Bo; Zhang, Ming Fusion Engineering and Design, Vol. 109-111 https://doi.org/10.1016/j.fusengdes.2016.02.057	journal	November 2016
Low-activation ferritic and martensitic steels for fusion application Kohyama, A.; Hishinuma, A.; Gelles, D. S. Journal of Nuclear Materials, Vol. 233-237 https://doi.org/10.1016/s0022-3115(96)00327-3	journal	October 1996
Evaluation of magnetic fields due to the ferromagnetic vacuum vessel and their influence on plasma discharge in tokamak devices Nakayama, T.; Abe, M.; Tadokoro, T. Journal of Nuclear Materials, Vol. 271-272 https://doi.org/10.1016/s0022-3115(98)00806-x	journal	May 1999
Fusion materials science: Overview of challenges and recent progress Zinkle, Steven J. Physics of Plasmas, Vol. 12, Issue 5 https://doi.org/10.1063/1.1880013	journal	May 2005
Resistive ferromagnetic wall modes in theory and experiment Pustovitov, V. D. Physics of Plasmas, Vol. 16, Issue 5 https://doi.org/10.1063/1.3129803	journal	May 2009
Ferromagnetic effects in the theory of slow and fast resistive wall modes in tokamaks Pustovitov, V. D.; Yanovskiy, V. V. Physics of Plasmas, Vol. 21, Issue 2 https://doi.org/10.1063/1.4867176	journal	February 2014
Rotational stabilization of the resistive wall modes in tokamaks with a ferritic wall Pustovitov, V. D.; Yanovskiy, V. V. Physics of Plasmas, Vol. 22, Issue 3 https://doi.org/10.1063/1.4915129	journal	March 2015
Active and passive kink mode studies in a tokamak with a movable ferromagnetic walla) Levesque, J. P.; Hughes, P. E.; Bialek, J. Physics of Plasmas, Vol. 22, Issue 5 https://doi.org/10.1063/1.4918360	journal	May 2015
Design and installation of a ferromagnetic wall in tokamak geometry Hughes, P. E.; Levesque, J. P.; Rivera, N. Review of Scientific Instruments, Vol. 86, Issue 10 https://doi.org/10.1063/1.4932312	journal	October 2015
The biorthogonal decomposition as a tool for investigating fluctuations in plasmas Dudok de Wit, T.; Pecquet, A. ‐L.; Vallet, J. ‐C. Physics of Plasmas, Vol. 1, Issue 10 https://doi.org/10.1063/1.870481	journal	October 1994
Hydromagnetic stability of tokamaks Wesson, J. A. Nuclear Fusion, Vol. 18, Issue 1 https://doi.org/10.1088/0029-5515/18/1/010	journal	January 1978
High performance tokamak experiments with a ferritic steel wall on JFT-2M Tsuzuki, K.; Kimura, H.; Kawashima, H. Nuclear Fusion, Vol. 43, Issue 10 https://doi.org/10.1088/0029-5515/43/10/033	journal	October 2003
Ferromagnetic and resistive wall effects on the beta limit in a tokamak Kurita, G.; Tuda, T.; Azumi, M. Nuclear Fusion, Vol. 43, Issue 9 https://doi.org/10.1088/0029-5515/43/9/319	journal	August 2003
Compatibility of reduced activation ferritic steel wall with high performance plasma on JFT-2M Tsuzuki, K.; Kamiya, K.; Shinohara, K. Nuclear Fusion, Vol. 46, Issue 11 https://doi.org/10.1088/0029-5515/46/11/010	journal	October 2006
Ferritic insertion for reduction of toroidal magnetic field ripple on JT-60U Shinohara, K.; Sakurai, S.; Ishikawa, M. Nuclear Fusion, Vol. 47, Issue 8 https://doi.org/10.1088/0029-5515/47/8/034	journal	August 2007
ITER test blanket module error field simulation experiments at DIII-D Schaffer, M. J.; Snipes, J. A.; Gohil, P. Nuclear Fusion, Vol. 51, Issue 10 https://doi.org/10.1088/0029-5515/51/10/103028	journal	September 2011
Multimode observations and 3D magnetic control of the boundary of a tokamak plasma Levesque, J. P.; Rath, N.; Shiraki, D. Nuclear Fusion, Vol. 53, Issue 7 https://doi.org/10.1088/0029-5515/53/7/073037	journal	June 2013
The high beta tokamak-extended pulse magnetohydrodynamic mode control research program Maurer, D. A.; Bialek, J.; Byrne, P. J. Plasma Physics and Controlled Fusion, Vol. 53, Issue 7 https://doi.org/10.1088/0741-3335/53/7/074016	journal	May 2011
Improved feedback control of wall stabilized kink modes with different plasma–wall couplings and mode rotation Peng, Q.; Levesque, J. P.; Stoafer, C. C. Plasma Physics and Controlled Fusion, Vol. 58, Issue 4 https://doi.org/10.1088/0741-3335/58/4/045001	journal	January 2016
A path to stable low-torque plasma operation in ITER with test blanket modules Lanctot, M. J.; Snipes, J. A.; Reimerdes, H. Nuclear Fusion, Vol. 57, Issue 3 https://doi.org/10.1088/1741-4326/57/3/036004	journal	December 2016
Observation of Resistive and Ferritic Wall Modes in a Line-Tied Pinch Bergerson, W. F.; Hannum, D. A.; Hegna, C. C. Physical Review Letters, Vol. 101, Issue 23 https://doi.org/10.1103/PhysRevLett.101.235005	journal	December 2008
Stabilization of external modes in tokamaks by resistive walls and plasma rotation Bondeson, A.; Ward, D. J. Physical Review Letters, Vol. 72, Issue 17 https://doi.org/10.1103/PhysRevLett.72.2709	journal	April 1994
Observation of Resistive and Ferritic Wall Modes in a Line-Tied Pinch Bergerson, W. F.; Hannum, D. A.; Hegna, C. C. Physical Review Letters, Vol. 101, Issue 23 https://doi.org/10.1103/physrevlett.101.235005	journal	December 2008
Stabilization of external modes in tokamaks by resistive walls and plasma rotation Bondeson, A.; Ward, D. J. Physical Review Letters, Vol. 72, Issue 17 https://doi.org/10.1103/physrevlett.72.2709	journal	April 1994

Cited By (1)

Mode rotation control in a tokamak with a feedback-driven biased electrode Brooks, J. W.; Stewart, I. G.; Boyer, M. D. Review of Scientific Instruments, Vol. 90, Issue 2 https://doi.org/10.1063/1.5062271	journal	February 2019

Similar Records

Design and installation of a ferromagnetic wall in tokamak geometry

Journal Article · 2015 · Review of Scientific Instruments · OSTI ID:1469383

Hughes, P. E.; Levesque, J. P.; Rivera, N.; +2 more

Design and installation of a ferromagnetic wall in tokamak geometry

Journal Article · 2015 · Review of Scientific Instruments · OSTI ID:22482559

Levesque, J. P.; Rivera, N.; Mauel, M. E.; +1 more

Active and passive kink mode studies in a tokamak with a movable ferromagnetic wall

Journal Article · 2015 · Physics of Plasmas · OSTI ID:22410383

Levesque, J. P.; Hughes, P. E.; Bialek, J.; +6 more

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ferromagnetic resistive wall mode
magnetohydrodynamics
plasma instabilities
tokamaks

Title: Dynamics of MHD instabilities near a ferromagnetic wall

Citation Formats

References (27)

Cited By (1)

Similar Records

Related Subjects