Experimental Observation of the Blob-Generation Mechanism from Interchange Waves in a Plasma

I. Furno, B. Labit, M. Podestà, A. Fasoli, S. H. Müller, F. M. Poli, P. Ricci, C. Theiler, S. Brunner, A. Diallo, and J. Graves
Phys. Rev. Lett. 100, 055004 – Published 6 February 2008
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Abstract

The mechanism for blob generation in a toroidal magnetized plasma is investigated using time-resolved measurements of two-dimensional structures of electron density, temperature, and plasma potential. The blobs are observed to form from a radially elongated structure that is sheared off by the E×B flow. The structure is generated by an interchange wave that increases in amplitude and extends radially in response to a decrease of the radial pressure scale length. The dependence of the blob amplitude upon the pressure radial scale length is discussed.

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  • Received 16 June 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.055004

©2008 American Physical Society

Authors & Affiliations

I. Furno1, B. Labit1, M. Podestà1, A. Fasoli1, S. H. Müller1,2, F. M. Poli1, P. Ricci1, C. Theiler1, S. Brunner1, A. Diallo1, and J. Graves1

  • 1Centre de Recherches en Physique des Plasmas-Ecole Polytechnique Fédérale de Lausanne, Association EURATOM-Confédération Suisse, CH-1015 Lausanne, Switzerland
  • 2Center for Energy Research, University of California, San Diego, La Jolla, California 92093, USA

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Issue

Vol. 100, Iss. 5 — 8 February 2008

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