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APS » Journals » Phys. Rev. Lett. » Volume 96 » Issue 19
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Phys. Rev. Lett. 96, 195003 (2006) [4 pages]

Observation of High-Field-Side Crash and Heat Transfer during Sawtooth Oscillation in Magnetically Confined Plasmas

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H. K. Park1, N. C. Luhmann, Jr.2, A. J. H. Donné3, I. G. J. Classen3, C. W. Domier2, E. Mazzucato1, T. Munsat4, M. J. van de Pol3, Z. Xia2, and TEXTOR team
1Princeton Plasma Physics Laboratory, Princeton, New Jersey, USA
2University of California at Davis, Davis, California, USA
3FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, P.O. Box 1207, 3430 BE Nieuwegein, The Netherlands
4University of Colorado at Boulder, Boulder, Colorado, USA
5Forschungszentrum Jülich GmbH, Institut für Plasmaphysik, Association EURATOM-FZJ, D-52425 Jülich, Germany

Received 6 December 2005; published 19 May 2006

High resolution (temporal and spatial), two-dimensional images of electron temperature fluctuations during sawtooth oscillations were employed to study the crash process and heat transfer in magnetically confined toroidal plasmas. The combination of kink and local pressure driven instabilities leads to a small poloidally localized puncture in the magnetic surface at both the low and the high field sides of the poloidal plane. This observation closely resembles the “fingering event” of the ballooning mode model with the high-m mode only predicted at the low field side.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.195003
DOI:
10.1103/PhysRevLett.96.195003
PACS:
52.35.Vd, 52.55.−s

*Partners in the Trilateral Euregio Cluster.

 
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