Transport-Driven Scrape-off Layer Flows and the Boundary Conditions Imposed at the Magnetic Separatrix in a Tokamak Plasma
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چکیده
منابع مشابه
The Scrape - Off - Layer in Alcator C - Mod – Transport , Turbulence , and Flows
Research on the scrape-off-layer plasma of the Alcator C-Mod Tokamak is reviewed. The research has focused on understanding the transport of energy and particles both parallel and perpendicular to the magnetic field. Large differences between the inboard, high-field side scrape-off-layer and the outboard, low-field side are found. On the outboard side large levels of anomalous cross-field trans...
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The tokamak scrape-off-layer (SOL) is a primary component of the interface between the core plasma and the material surfaces of the vacuum vessel. Investigations on the Mega-Ampere Spherical Tokamak (MAST) have been undertaken in an effort to characterise the filamentary nature of the SOL and to assess the influence of this intermittency on traditional steady-state approximations of the plasma ...
متن کاملParticle transport in the scrape-off layer and its relationship to discharge density limit in Alcator C-Mod*
Cross-field particle transport in the scrape-off layer ~SOL! of Alcator C-Mod @Phys. Plasmas 1, 1511 ~1994!# can be characterized by an effective particle diffusivity (Deff) that increases markedly with distance from the separatrix. As a consequence, recycling onto the main-chamber walls is large compared to plasma flows into the divertor volume. The SOL exhibits a two-layer structure: Steep gr...
متن کاملPFC / JA - 96 - 5 The Influence of Anomalous Diffusion on Parallel Ion Transport in Edge Plasmas
In edge plasmas, such as the tokamak scrape-off layer, transport parallel and perpendicular to the magnetic field are strongly coupled. It is shown that this leads to an unconventional form of the parallel transport laws. In particular, if the radial transport is governed by anomalous diffusion, the parallel ion transport cannot be entirely classical. This general phenomenon is demonstrated exp...
متن کاملConvective transport in the scrape-off layer of tokamaks
A detailed study of blob formation, dynamics, and the associated convective transport in the scrape-off layer sSOLd of tokamak plasmas is presented. Dissipation level in the system, in addition to the blob size, is shown to play an important role in determining whether a blob propagates as a coherent object. Nonlinear SOL interchange/ballooning modes are shown to be capable of creating blobs ne...
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تاریخ انتشار 2004