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Fusion Technology, 1998
The objective of this lecture is to introduce the subject of plasma edge physics. Although this is a rapidly moving target at the various related research frontiers, the basics are generally accepted, and only these will be discussed here. In particular we will restrict ourself to a classical fluid picture for the plasma transport along the B-field ...
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The objective of this lecture is to introduce the subject of plasma edge physics. Although this is a rapidly moving target at the various related research frontiers, the basics are generally accepted, and only these will be discussed here. In particular we will restrict ourself to a classical fluid picture for the plasma transport along the B-field ...
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Edge transport in fusion plasmas
Plasma Physics and Controlled Fusion, 2007It has long been recognized that the plasma edge and the interaction of the plasma with material interfaces through the scrape-off layer (SOL) is crucial for the successful operation of future fusion machines, e.g. ITER. Tremendous progress has been achieved in the last decade in diagnosing, modelling and understanding this plasma region.
V Naulin, W Fundamenski, R Zagorski
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Recurrence in plasma edge turbulence
Physics of Plasmas, 2001Common statistics of turbulent electrostatic fluctuations observed at the plasma edge and scrape-off layer are analyzed in three tokamak devices that have different configurations. The statistics of experimental data collected using fixed sampling time is the same than the statistics of the time for which the oscillation return to a specified reference
M. S. Baptista +5 more
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Marfe: an edge plasma phenomenon
Nuclear Fusion, 1984A tokamak edge phenomenon, dubbed the 'marfe' (for multifaceted asymmetric radiation from the edge), is described. This phenomenon, observed in medium- to high-density Alcator C discharges, is characterized by greatly increased radiation, density and density fluctuations, and decreased temperature in a relatively small volume at the inner major radius ...
B. Lipschultz +6 more
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Plasma edge research on TEXTOR
Plasma Physics and Controlled Fusion, 1987The relations between plasma wall interaction and plasma core properties are studied by spectroscopic methods applied to the emission of neutral particles at the plasma boundary. The interdependence between the structure of the scrape-off layer (SOL), particle-fluxes and impurity release are analyzed. In particular, the importance of molecule formation
U Samm +10 more
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Kinetic effects in edge plasma: kinetic modeling for edge plasma and detached divertor
Plasma Physics and Controlled Fusion, 2017Detached divertor is considered a solution for the heat control in magnetic-confinement fusion reactors. Numerical simulations using the comprehensive divertor codes based on the plasma fluid modeling are indispensable for the design of the detached divertor in future reactors.
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Plasma sheath transmission factors for tokamak edge plasmas
The Physics of Fluids, 1984Simple analytic relations are derived for the floating potential of a solid object in contact with a magnetized plasma as a function of the electron/ion mass ratio, the electron/ion temperature ratio, and the secondary electron emission coefficient. Simple analytic relations are also obtained for the sheath transmission factors, i.e., the particle and ...
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Edge Plasma in Snowflake Divertor
Contributions to Plasma Physics, 2010AbstractThe snowflake divertor (Ryutov 2007, Phys. Plasmas 14, 064502) uses a 2nd order null of the poloidal magnetic field instead of the 1st order null used in the standard divertor. This leads to a number of interesting geometric properties such as stronger fanning of the poloidal flux, stronger magnetic shear in the edge region, larger radiating ...
M.V. Umansky +3 more
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Plasma edge model for tokamaks
Journal of Nuclear Materials, 1980Abstract The discharge characteristics in fusion experiments, particularly tokamaks, are often determined by the coupling between the core plasma and the region between the limiter and the vacuum wall. A zero dimensional scrape-off model is developed which incorporates the essential atomic physics and plasma/wall interactions.
M.R. Gordinier, R.W. Conn
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Molecular Diagnostics of Cold Edge Plasmas
2005The presence of molecules in cold edge plasmas requires detailed investigations on the basis of simple diagnostic methods. For this purposes, the powerful tool of molecular emission spectroscopy in the visible spectral range is introduced. Applications to divertor plasmas of fusion experiments (AS-DEX Upgrade) are shown.
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