Avoiding Tokamak Disruptions by Applying Static Magnetic Fields That Align Locked Modes with Stabilizing Wave-Driven Currents [Avoiding Tokamak Disruptions by Magnetically Aligning Locked Modes with Stabilizing Wave-Driven Currents]

Volpe, F. A.; Hyatt, Alan; La Haye, Robert J.; Lanctot, Matthew J.; Lohr, John; Prater, Ronald; Strait, Edward J.; Welander, Anders

doi:10.1103/PhysRevLett.115.175002

Title: Avoiding Tokamak Disruptions by Applying Static Magnetic Fields That Align Locked Modes with Stabilizing Wave-Driven Currents [Avoiding Tokamak Disruptions by Magnetically Aligning Locked Modes with Stabilizing Wave-Driven Currents]

Journal Article · Mon Oct 19 00:00:00 EDT 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.115.175002· OSTI ID:1376858

Volpe, F. A. ^[1]; Hyatt, Alan ^[2]; La Haye, Robert J. ^[2]; Lanctot, Matthew J. ^[2]; Lohr, John ^[2]; Prater, Ronald ^[2]; Strait, Edward J. ^[2]; Welander, Anders ^[2]

Columbia Univ., New York, NY (United States)
General Atomics, San Diego, CA (United States)

The international ITER tokamak has the objective of demonstrating the scientific feasibility of magnetic confinement fusion as a source of energy. A concern towards the achievement of this goal is represented by major disruptions: complete losses of confinement often initiated by a non-rotating ('locked') magnetic island created by magnetic reconnection. During disruptions, energy and particles accumulated in the plasma volume over many seconds are lost in a few milliseconds and released on the plasma-facing materials. In addition, multi-MA level currents flowing in the tokamak plasma for its sustainment and confinement are lost, also in milliseconds, thus terminating the plasma discharge and causing electromagnetic stresses that, if unmitigated, could lead to excessive device wear. Moreover it is shown that magnetic perturbations can be used to avoid disruptions by "guiding" the magnetic island to lock in a position where it is accessible to millimetre wave beams that fully stabilize it.

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

Sponsoring Organization:: USDOE

Grant/Contract Number:: FC02-04ER54698

OSTI ID:: 1376858

Journal Information:: Physical Review Letters, Vol. 115, Issue 17; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 30 works

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Helical variation of density profiles and fluctuations in the tokamak pedestal with applied 3D fields and implications for confinement Wilcox, R. S.; Rhodes, T. L.; Shafer, M. W. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5024378	journal	May 2018
RF current condensation in magnetic islands and associated hysteresis phenomena Rodríguez, E.; Reiman, A. H.; Fisch, N. J. Physics of Plasmas, Vol. 26, Issue 9 https://doi.org/10.1063/1.5118424	journal	September 2019
Relationship between locked modes and thermal quenches in DIII-D Sweeney, R.; Choi, W.; Austin, M. Nuclear Fusion, Vol. 58, Issue 5 https://doi.org/10.1088/1741-4326/aaaf0a	journal	March 2018
Suppression of explosive bursts triggered by neo-classical tearing mode in reversed magnetic shear tokamak plasmas via ECCD Liu, Tong; Wang, Zheng-Xiong; Wang, Jialei Nuclear Fusion, Vol. 58, Issue 7 https://doi.org/10.1088/1741-4326/aac527	journal	June 2018
Plasma response to rotating resonant magnetic perturbations with a locked mode in the J-TEXT tokamak Wang, Nengchao; Rao, Bo; Hu, Qiming Nuclear Fusion, Vol. 59, Issue 2 https://doi.org/10.1088/1741-4326/aaf4a3	journal	January 2019
Impact of n = 1 field on the non-axisymmetric magnetic perturbations associated with the edge localized mode crashes in the ASDEX Upgrade tokamak Wang, Nengchao; Liang, Yunfeng; Igochine, Valentin Nuclear Fusion, Vol. 59, Issue 5 https://doi.org/10.1088/1741-4326/ab0f82	journal	March 2019
Progress in disruption prevention for ITER Strait, E. J.; Barr, J. L.; Baruzzo, M. Nuclear Fusion, Vol. 59, Issue 11 https://doi.org/10.1088/1741-4326/ab15de	journal	June 2019
A new stabilizing regime of tearing mode entrainment in the presence of a static error field Okabayashi, M.; Inoue, S.; Logan, N. C. Nuclear Fusion, Vol. 59, Issue 12 https://doi.org/10.1088/1741-4326/ab37d2	journal	September 2019
Control of neoclassical tearing mode by synergetic effects of resonant magnetic perturbation and electron cyclotron current drive in reversed magnetic shear tokamak plasmas Tang, Weikang; Wang, Zheng-Xiong; Wei, Lai Nuclear Fusion, Vol. 60, Issue 2 https://doi.org/10.1088/1741-4326/ab61d5	journal	January 2020
Effects of resonant magnetic perturbation on locked mode of neoclassical tearing modes Tang, Weikang; Wei, Lai; Wang, Zhengxiong Plasma Science and Technology, Vol. 21, Issue 6 https://doi.org/10.1088/2058-6272/ab0a18	journal	April 2019
Effects of resonant magnetic perturbation on locked mode of neo-classical tearing modes Tang, Weikang; Wei, Lai; Wang, Zheng-Xiong arXiv https://doi.org/10.48550/arxiv.1907.12937	text	January 2019

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