Characterization of intermittent bursts at the edge of the CASTOR tokamak

Journal Article · Mon Sep 15 04:00:00 EDT 2008 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X08090031· OSTI ID:21399978

Nanobashvili, I ^[1]; Devynck, P ^[2]; Nanobashvili, S ^[1]; Peleman, P ^[3]; Stockel, J ^[4]; Van Oost, G ^[3]

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1. Andronikashvili Institute of Physics (Georgia)
2. CEA/DSM/DRFC Cadarache, Association EURATOM-CEA (France)
3. Ghent University, Department of Applied Physics (Belgium)
4. Association EURATOM/IPP.CR, Institute of Plasma Physics (Czech Republic)

Temporal characteristics of density bursts in the scrape-off layer of the CASTOR tokamak were investigated. Intermittent positive bursts of density are observed by means of a radial array of Langmuir probes. Globally (comparing the closest and furthermost radial positions with respect to the center of the discharge chamber) we observe a radial decrease of average burst rate together with a radial increase of the average burst duration. Recently, we observed a monotonic radial decrease of average burst rate together with an increase of the average burst duration in the Tore Supra tokamak [1, 2], but the decay length is significantly shorter than in CASTOR. This is most probably due to radially elongated turbulent events (streamers), which govern the radial transport at the edge of the CASTOR tokamak [3] and are responsible for the appearance of density bursts.

• OSTI ID: 21399978
• Journal Information: Plasma Physics Reports, Journal Name: Plasma Physics Reports Journal Issue: 9 Vol. 34; ISSN PPHREM; ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOUNDARY LAYERS
CASTOR TOKAMAK
CLOSED PLASMA DEVICES
DENSITY
ELECTRIC PROBES
LANGMUIR PROBE
LAYERS
PHYSICAL PROPERTIES
PLASMA SCRAPE-OFF LAYER
PROBES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TORE SUPRA TOKAMAK