Results 261 to 270 of about 28,655 (296)

Computational Modelling of a Purely Neoclassical Scrape-Off Layer

Contributions to Plasma Physics, 2002
We study the Scrape-off Layer of ASDEX Upgrade in a scenario where the neoclassical transport phenomena are dominant with respect to the anomalous contributions. To represent such a neoclassical scenario, we implemented the expressions for the energy and momentum radial transport, toroidicity effects being introduced automatically by the tokamak ...
SUBBA, Fabio, X. BONNIN, R. SCHNEIDER, S. KUHN   +3 more
openaire   +3 more sources

Kinetic modeling of scrape-off layer plasmas

Physics of Plasmas, 1996
Electron transport along open field lines in the diverted scrape-off layer of a tokamak is studied numerically via a kinetic Fokker–Planck approach. The method allows calculation of the distribution function in a situation where large parallel temperature gradients are maintained by collisional relaxation and, at the same time, superthermal electrons ...
K. Kupfer, R. W. Harvey, O. Sauter, M. J. Schaffer, G. M. Staebler   +4 more
openaire   +1 more source

Modelling of Scrape‐Off Layer Biasing Experiments

Contributions to Plasma Physics, 1996
AbstractBased on the extended B2‐code a method has been developed to simulate electrode as well as divertor biasing experiments. To improve the convergence speed of the code a new implicit discretisation scheme for the potential equation based on the Braginski equations was implemented, incorporating viscosity and pressure gradient effects in the ...
M. van Schoor, M. Baelmans, R. R. Weynants   +2 more
openaire   +1 more source

3D Scrape-off layer modelling with BoRiS

Journal of Nuclear Materials, 2005
Abstract The 3D fluid transport code BoRiS is applied to a hydrogen plasma and a neutral fluid in a stellarator-like geometry equipped with a poloidal ring limiter. The results demonstrate the capability of dealing with 3D effects which can be related to both the influence of the geometry and the plasma–neutral interaction as well. The setup used has
Riemann, J., Borchardt, M., Schneider, R., Mutzke, A.   +3 more
openaire   +2 more sources

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.
openaire   +2 more sources

Parametric Study of Biased Scrape‐Off Layer

Contributions to Plasma Physics, 1992
AbstractThe particle and energy balance equations in the scrape‐off layer (SOL) plasma are solved analytically in a rectangular domain. The parallel flow is supposed to be convective, whereas the cross field flow is assumed diffusive, with modifications due to a radial E field.
openaire   +1 more source

Scrape-off layer turbulence modulated by Mirnov oscillations

Czechoslovak Journal of Physics, 2005
We investigate plasma turbulence at the scrape-off layer of TCABR tokamak. We apply a power spectral analysis to the magnetic Mirnov oscillations and electrostatic fluctuations, to quantify statistical properties and to estimate the turbulence-driven radial-particle flux.
M. V. A. P. Heller, I. L. Caldas, A. A. Ferreira, E. A. O. Saettone, A. Vannucci, I. C. Nascimento, J. H. F. Severo   +6 more
openaire   +1 more source

Interchange turbulence in the TCV scrape-off layer

Plasma Physics and Controlled Fusion, 2005
Probe measurements of electrostatic plasma fluctuations in the scrape-off layer (SOL) of the TCV tokamak are compared with the results from two-dimensional interchange turbulence simulations. Excellent agreement is found for both the radial variation of statistical moments and temporal correlations, clearly indicating that turbulent transport in the ...
O E Garcia, J Horacek, R A Pitts, A H Nielsen, W Fundamenski, J P Graves, V Naulin, J Juul Rasmussen   +7 more
openaire   +1 more source

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

Scrape off layer modelling studies for SST-I

Journal of Nuclear Materials, 1999
Abstract SOL modelling results for SST-1 (SST Team, Proceedings of the 16th IEEE/NPSS Symposium on Fusion Engineering, Champaign, IL, vol. II, 1995, p. 481) show a sheath limited flow regime. This is due to the low edge densities required by lower hybrid current drive (LHCD), coupled with high power input per unit volume.
Warrier, M., Jaishankar, S., Deshpande, S., Coster, D., Schneider, R., Chaturvedi, S., Srinivasan, R., Braams, B.   +7 more
openaire   +2 more sources