Results 271 to 280 of about 3,423,360 (305)

On scrape off layer plasma transport

Physics Letters A, 2001
Abstract Qualitative physical picture describing fast convective radial plasma transport in tokamak scrape off layer is suggested. It is based on the hypothesis of detachment of high density plasma blobs from the bulk plasma due to turbulence effects resulting in plasma stratification in the region around separatrix.
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Scrape-off layer intermittency in the Castor tokamak

Physics of Plasmas, 1999
Spatial–temporal intermittency of floating potential and ion saturation current fluctuations is analyzed by using data obtained from two probes arrays in the scrape-off layer of the CASTOR tokamak [Proceedings of the 1996 International Conference on Plasma Physics (Nagoya) (International Atomic Energy Agency, Vienna, 1997), Vol. I, p. 322].
M. V. A. P. Heller, Z. A. Brasilio, I. L. Caldas, J. Stöckel, J. Petrzilka   +4 more
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Scrape-off layer tokamak plasma turbulence

Physics of Plasmas, 2012
Two-dimensional (2D) interchange turbulence in the scrape-off layer of tokamak plasmas and their subsequent contribution to anomalous plasma transport has been studied in recent years using electron continuity, current balance, and electron energy equations.
N. Bisai, R. Singh, P. K. Kaw
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Scrape-off layer measurements in DIII-D

Journal of Nuclear Materials, 1992
In this paper, scrape-off layer measurements in DIII-D are presented as a function of the main discharge plasma parameters. A systematic study is under way to understand and predict the behavior of the edge and divertor plasma in DIII-D and this scaling behavior will be crucial for the design of ITER.
J.G. Watkins, R.A. Moyer, D.N. Hill, D. Buchenauer, T.N. Carlstrom, R. Conn, J. Cuthbertson, R. Doerner, R. Lehmer, M.A. Mahdavi, R.T. McGrath, L. Schmitz, R. Stambaugh   +12 more
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On “Recycling” Instability of the Scrape-off Layer Plasma

Plasma Physics Reports, 2021
A new type of scrape-off layer plasma instability associated with radial inhomogeneity of plasma density, contact of plasma with conducting material surfaces, and neutral recycling is presented. In order to elucidate the physics of this instability, the simplest possible setup is analyzed.
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Effects of poloidally asymmetric sources in the scrape-off layer

Journal of Nuclear Materials, 1990
Abstract Significant in-outboard and up-down asymmetries of power load and plasma parameters at the divertor plates have been observed in several tokamaks. In this paper we study the problem considering the idealized situation of two divertor chambers connected by straight magnetic field lines, under the assumption that the plates are electrically ...
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Towards Finite Element Modeling of the Tokamak Scrape‐Off Layer

Contributions to Plasma Physics, 1992
AbstractFinite elements provide a natural and flexible method for two‐dimensional fluid modeling of the tokamak scrape‐off layer. Here we present the first results obtained with the FELS code [1] on an unstructured grid, for the case of a toroidal limiter.
ZANINO, Roberto, PAOLINI M, RUSSO A.
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Parallel flow in the JET scrape-off layer

Plasma Physics and Controlled Fusion, 2000
Parallel plasma flows with Mach number M≈0.5 have been measured in the JET scrape-off layer (SOL). These flows show a maximum some 10-20 mm mid-plane outside the separatrix, and decrease towards the separatrix. The flow reverses when BT and IP are reversed, but is asymmetric about zero.
S K Erents, A V Chankin, G F Matthews, P C Stangeby   +3 more
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A model for the turbulence in the scrape-off layer of tokamaks

Nuclear Fusion, 1991
The fluid theory of electrostatic perturbations in a scrape-off layer (SOL) plasma is analysed. The main difficulty is that the edge is theoretically found to be stable, while experimentally it is unstable. A possible explanation relies on the fact that the commonly used ballooning representation is not correct in the SOL. An alternative representation
X. Garbet, L. Laurent, J.-P. Roubin, A. Samain   +3 more
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Heat transport in the JET scrape-off layer

Nuclear Fusion, 1998
The DIVIMP/NIMBUS onion skin model (OSM) has been used to calculate 2-D plasma distributions of ne, Te and Ti in the JET edge, based on boundary conditions measured across the targets with built-in Langmuir probes. Ohmic, L mode and ELMy H mode discharges were analysed.
S.K Erents, P.C Stangeby
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