Electrostatic Analysis of the Tokamak Edge Plasma PDF Download
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Author: Robert W. Motley
Publisher:
ISBN:
Category :
Languages : en
Pages : 35
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Book Description
Author: Robert W. Motley
Publisher:
ISBN:
Category :
Languages : en
Pages : 35
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The intrusion of an equipotential poloidal limiter into the edge plasma of a circular tokamak discharge distorts the axisymmetry in two ways: (1) it (partially) shorts out the top-to-bottom Pfirsch-Schlueter driving potentials, and (2) it creates zones of back current flow into the limiter. The resulting boundary mismatch between the outer layers and the inner axisymmetric Pfirsch-Schlueter layer provides free energy to drive the edge plasma unstable. Special limiters are proposed to symmetrize the edge plasma and thereby reduce the electrical and MHD activity in the boundary layer.
Author:
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Category : Controlled fusion
Languages : en
Pages : 160
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Author:
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Category : Power resources
Languages : en
Pages : 782
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Author:
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ISBN:
Category :
Languages : en
Pages :
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The edge plasma plays key roles in tokamak devices: generates the edge transport-barrier yielding the L-H core confinement transition, distributes the core charged-particle energy to surrounding material surfaces, shields the core from impurities, and removes helium ash in fusion plasmas. The transport of density, momentum, and energy in the near-separatrix edge region, and the corresponding self-consistent electrostatic potential, require a two-dimensional description, here incorporated into the UEDGE code. In the direction across the B-field, both turbulent transport and classical cross-field flows are important. The role of classical flows is analyzed in detail in the presence of an assumed diffusive turbulent transport. Results and explanations are given for the generation of radial electric field near the separatrix, edge plasma asymmetries and differences between double-null DIII-D and NSTX devices, comparisons with DIII-D diagnostics for single-null divertor, and core/edge transport coupling.
Author: Martin Kubic
Publisher: LAP Lambert Academic Publishing
ISBN: 9783847328711
Category :
Languages : en
Pages : 68
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Book Description
The study of edge plasma physics in tokamaks has developed rapidly in recent years and is now considered as one of the major research areas of magnetic fusion. Edge probe techniques are a necessary experimental contribution to such studies, providing information about the plasma flux to the walls of the reactor. The experiments that were carried out on the Tore Supra tokamak to investigate the scrape-off layer conditions in presence of multiple discrete limiters are presented. The baseline of the scenario is to limit the discharge on discrete limiters on the low field side of the tokamak chamber, increasing the minor radius while the safety factor is kept at a constant value 4.8. Analytical tools for 3D magnetic connection analysis and magnetic field mapping together with a new method for LCFS evaluation are also presented."
Author: Xin Wang
Publisher:
ISBN:
Category :
Languages : en
Pages : 208
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Author: Samuli Saarelma
Publisher:
ISBN: 9789512276004
Category :
Languages : en
Pages : 84
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Author: Hong Xiao
Publisher:
ISBN:
Category : Tokamaks
Languages : en
Pages : 208
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Author: Jan Horáček
Publisher:
ISBN:
Category :
Languages : en
Pages : 171
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