Observation of Edge Instability Limiting the Pedestal Growth in Tokamak Plasmas
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Diallo-2014-Observation of edge instability.pdf
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Author(s)
Diallo, A.
Davis, E.
Theiler, C.
Snyder, P.
Canik, J.
Walk, J.
Churchill, M.
Delgado-Aparicio, Luis
White, A.
Hughes, Jerry W., Jr.
Date Issued
March 2014
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Diallo, A., J. W. Hughes, M. Greenwald, B. LaBombard, E. Davis, S-G. Baek, C. Theiler, et al. “Observation of Edge Instability Limiting the Pedestal Growth in Tokamak Plasmas.” Physical Review Letters 112, no. 11 (March 2014). © 2014 American Physical Society
Version
Final published version
Abstract
With fusion device performance hinging on the edge pedestal pressure, it is imperative to experimentally understand the physical mechanism dictating the pedestal characteristics and to validate and improve pedestal predictive models. This Letter reports direct evidence of density and magnetic fluctuations showing the stiff onset of an edge instability leading to the saturation of the pedestal on the Alcator C-Mod tokamak. Edge stability analyses indicate that the pedestal is unstable to both ballooning mode and kinetic ballooning mode in agreement with observations.
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.112.115001
