Results 221 to 230 of about 2,926 (263)

Scrape-off layer reflectometer for Alcator C-Mod

Review of Scientific Instruments, 2008
A two-frequency x-mode reflectometer operating from 100 to 146 GHz is deployed on Alcator C-Mod to measure the density profile and fluctuations in the scrape-off layer (SOL) immediately in front of the new J-port ICRF antenna and the new C-port lower hybrid launcher. The reflectometer covers densities from 1016 to 1020 m−3 at 5–5.4 T.
G R, Hanson, J B, Wilgen, C, Lau, Y, Lin, G M, Wallace, S J, Wukitch   +5 more
openaire   +2 more sources

Theory of the scrape-off layer for arbitrary collisionality

Journal of Nuclear Materials, 1980
Abstract A two-dimensional analysis of the plasma boundary in a tokamak with any given set of toroidal target plates (as in a poloidal divertor or in a toroidal limiter system) is presented. The related boundary value problem for the drift kinetic equation of plasma ions with arbitrary collisionality is converted into a Hilbert problem for several ...
openaire   +2 more sources

Characterisation of the scrape-off layer plasma in the FTU tokamak

Journal of Nuclear Materials, 1995
Abstract The average values of the scrape-off layer (SOL) plasma quantities of FTU, density, temperature, e-folding lengths are studied as a function of the main plasma parameters and satisfactorily compared with 2D model predictions. The cause of their poloidal asymmetry is investigated and attributed to the variation of the magnetic line connection
Ridolfini, Vp, Zagorski, R, Crisanti, F, Granucci, G, Mazzitelli, G, Pieroni, L, ROMANELLI, FRANCESCO   +6 more
openaire   +3 more sources

Scrape-off layer reflectometer for Alcator C-Mod

Review of Scientific Instruments, 2010
A swept-frequency X-mode reflectometer is being built for Alcator C-Mod to measure the scrape-off layer density profiles at the top, middle, and bottom locations in front of both the new lower hybrid launcher and the new ion cyclotron range of frequencies antenna.
Cornwall, Lau, Greg, Hanson, John, Wilgen, Yijun, Lin, Steve, Wukitch   +4 more
openaire   +2 more sources

Dynamics of Impurities in the Scrape‐Off Layer

Contributions to Plasma Physics, 1988
AbstractImpurity modelling of the Scrape‐Off Layer, SOL, is reviewed. Simple analytic models are sometimes adequate for relating central impurity levels to edge plasma conditions and for explaining the patterns of net erosion/deposition found on limiters. More sophisticated approaches, which are also necessary, are categorized and reviewed.
openaire   +1 more source

Modeling of supersonic plasma flow in the scrape-off layer

Journal of Computational Physics, 2007
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Oleksandr Marchuk, Mikhail Z. Tokar
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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
openaire   +1 more source

Study of the Ionization Rate in the Scrape-off Layer

Contributions To Plasma Physics, 2004
AbstractThe purpose of this work is to study the effect of multi‐step ionization on the tokamak scrape‐of layer (SOL). Using particle‐in‐cell (PIC) simulations we show that this effect strongly influences the divertor plasma. Our results suggest that, at least for high‐recycling regimes, multi‐step ionization should necessarily be included in SOL ...
D Tskhakaya, S Kuhn
exaly   +2 more sources

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
openaire   +1 more source