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  Elongation and current scalings of local global energy transport

Becker, G. (2002). Elongation and current scalings of local global energy transport. Nuclear Fusion, 42(4), L8-L9.

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 Creators:
Becker, G.1, Author              
Affiliations:
1Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856309              

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 Abstract: The scaling of local and global energy confinement with elongation kappa and current in L- and H-mode plasmas is explored. It is shown that the elongation enters global confinement only through the : geometrical quantities of plasma volume and surface area. while local transport does not contribute. The global scaling tau(E) proportional to kappa(0.8) is caused by W proportional to n T-0 V with the volume V proportional to kappa and the surface area leading to T-0 proportional to kappa(-0.2). Empirical scalings of the effective heat diffusivity chi with kappa, the current inside a flux surface I (x). B-p and q are presented. Applying I (x) makes chi independent Of kappa, while a formulation with q yields strong implicit and explicit kappa dependences.

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Language(s): eng - English
 Dates: 2002-04
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 15593
ISI: 000175742700002
 Degree: -

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Title: Nuclear Fusion
  Alternative Title : Nucl. Fusion
Source Genre: Journal
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Pages: - Volume / Issue: 42 (4) Sequence Number: - Start / End Page: L8 - L9 Identifier: ISSN: 0029-5515