Multi-machine comparisons of H-mode separatrix densities and edge profile behaviour in the ITPA SOL and Divertor Physics Topical Group

Edge profile data for H-mode discharges in 6 tokamaks have been analysed with the main focus on the edge density profile as well as electron temperature and density gradient lengths and steep gradient zone widths. A uniform procedure of data treatment and assignment of the separatrix position via po...

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Bibliographic Details
Published in:	Journal of nuclear materials Vol. 337-339; pp. 381 - 385
Main Authors:	Kallenbach, A., Asakura, N., Kirk, A., Korotkov, A., Mahdavi, M.A., Mossessian, D., Porter, G.D.
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-03-2005
Subjects:	Edge transport Hydrogen recycling SOL plasma 52.55.Fa 52.25.Fi Hydrogen recycling P0600 Edge transport 52.65.−y SOL plasma
Online Access:	Get full text
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Summary:	Edge profile data for H-mode discharges in 6 tokamaks have been analysed with the main focus on the edge density profile as well as electron temperature and density gradient lengths and steep gradient zone widths. A uniform procedure of data treatment and assignment of the separatrix position via power balance allowed to put the multi-machine data on an even base. The machine size appears to be the leading parameter for the width of the steep edge transport barrier gradient zone, as well as for the temperature decay length at the separatrix. Effects associated with neutral penetration physics are visible in the edge density profile.
Bibliography:	SourceType-Scholarly Journals-2 ObjectType-Feature-2 ObjectType-Conference Paper-1 content type line 23 SourceType-Conference Papers & Proceedings-1 ObjectType-Article-3
ISSN:	0022-3115 1873-4820
DOI:	10.1016/j.jnucmat.2004.10.099