Results 131 to 140 of about 131,113 (167)

Molecular Diagnostics of Cold Edge Plasmas

2005
The 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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Edge plasma and fluctuations in TFTR

Journal of Nuclear Materials, 1992
Edge fluctuations and their associated transport have been measured in TFTR with a fast reciprocating drive shaft fitted with a Langmuir probe array specially designed to withstand high power density and to provide spatial resolution required for fluctuation measurements.
Tsui, H., Manos, D., Rudyj, A., Rtiz, C., Wootton, A.   +4 more
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Dust-plasma interactions In the plasma edge region

2016
This thesis concerns the interaction of small, particulate, solid matter - 'dust' - with plasmas, in the plasma edge region where such dust is commonly found. Dust in this region can have a significant impact on a variety of industrial plasma applications, and it is low-temperature industrial plasmas that form the focus of this work.
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Neoclassical theory of the plasma edge

Physics of Fluids B: Plasma Physics, 1993
Tokamak neoclassical theory is extended to the plasma edge region, where the gradient scale lengths of density, temperature, and rotation speed are comparable to the ion poloidal gyroradius, and where vθBφ/vthBθ∼O(1). A new drift due to viscosity is found to be important.
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Turbulent transport and the plasma edge

Journal of Nuclear Materials, 2007
Abstract In magnetically confined fusion experiments, turbulent transport dominates over collisional transport in the edge gradient region and in the scrape-off layer (SOL). Traditionally concepts as Fick’s law are used to describe turbulent transport by effective diffusion coefficients and convective velocities.
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Overview of Plasma Edge Physics

Fusion Science and Technology, 2006
Basic properties of the plasma edge in magnetically confined fusion plasmas are summarised. Starting from the magnetic topology of tokamaks we describe the transport of the scrape-off layer including drifts and the consequences of the electrostatic Debye sheath in front of the plasma facing components.
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Thermal Instabilities in the Plasma Edge

Contributions to Plasma Physics, 2000
A body of theory for the prediction of thermal instabilities in the plasma edge and application to interpretation of experimental phenomena are summarized. The evidence suggests that thermal instabilities are involved in the formation of “divertor MARFEs” and MARFEs in the edge plasma, in confinement degradation over the course of a discharge, and in ...
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Modeling and Meshing for Tokamak Edge Plasma Simulations

Computer Physics Communications, 2023
Usman Riaz, E. Seegyoung Seol, Robert Hager, Mark S. Shephard   +3 more
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Impurity transport at the plasma edge

Journal of Nuclear Materials, 1990
Abstract Of the three major links in the chain connecting plasma edge conditions to central impurity levels, that is, (a) production (b) edge transport (c) central transport, edge transport is the weakest link in that it is the most complex, least understood and hardest to measure directly.
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Properties of the Tokamak Edge Plasma

Contributions to Plasma Physics, 1988
AbstractA short review of some features of the edge plasma in limiter tokamaks is given. The limits of the simple 1‐D SOL model and the relation between the core plasma are discussed. MARFE phenomena and detached plasma are closely connected with the particle and energy balance of the SOL.
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