Neoclassical tearing mode control using vertical shifts on MAST

Thomas  O'Gorman; Kieran Gibson; Jack Arthur Snape; Graham Naylor; I. T. Chapman

Neoclassical tearing mode control using vertical shifts on MAST

Thomas O'Gorman, Kieran Gibson, Jack Arthur Snape, Graham Naylor, I. T. Chapman

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

Triggered vertical shifts of the MAST spherical tokamak plasma have been found to stabilize 2/1 neoclassical tearing modes (NTMs) for a number of MAST shots, without impacting on core confinement. This stabilization is a result of favourable modifications of the density, temperature and pressure profiles at the location of an NTM by means of a brief transition from high (H) to low (L) confinement mode. Using this method, the high confinement phase can typically be recovered, and the NTM removed, within 20 ms of onset.

Original language	English
Pages (from-to)	82002
Journal	Nuclear Fusion
Volume	54
Issue number	8
Publication status	Published - 2014

Access to Document

http://stacks.iop.org/0029-5515/54/i=8/a=082002

Cite this

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title = "Neoclassical tearing mode control using vertical shifts on MAST",

abstract = "Triggered vertical shifts of the MAST spherical tokamak plasma have been found to stabilize 2/1 neoclassical tearing modes (NTMs) for a number of MAST shots, without impacting on core confinement. This stabilization is a result of favourable modifications of the density, temperature and pressure profiles at the location of an NTM by means of a brief transition from high (H) to low (L) confinement mode. Using this method, the high confinement phase can typically be recovered, and the NTM removed, within 20 ms of onset.",

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T1 - Neoclassical tearing mode control using vertical shifts on MAST

AU - O'Gorman, Thomas

AU - Gibson, Kieran

AU - Snape, Jack Arthur

AU - Naylor, Graham

AU - Chapman, I. T.

PY - 2014

Y1 - 2014

N2 - Triggered vertical shifts of the MAST spherical tokamak plasma have been found to stabilize 2/1 neoclassical tearing modes (NTMs) for a number of MAST shots, without impacting on core confinement. This stabilization is a result of favourable modifications of the density, temperature and pressure profiles at the location of an NTM by means of a brief transition from high (H) to low (L) confinement mode. Using this method, the high confinement phase can typically be recovered, and the NTM removed, within 20 ms of onset.

AB - Triggered vertical shifts of the MAST spherical tokamak plasma have been found to stabilize 2/1 neoclassical tearing modes (NTMs) for a number of MAST shots, without impacting on core confinement. This stabilization is a result of favourable modifications of the density, temperature and pressure profiles at the location of an NTM by means of a brief transition from high (H) to low (L) confinement mode. Using this method, the high confinement phase can typically be recovered, and the NTM removed, within 20 ms of onset.

M3 - Article

SN - 0029-5515

VL - 54

SP - 82002

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 8

ER -