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An international database for the study of the formation of ITBs in tokamaks
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2002 (English)In: Plasma Physics and Controlled Fusion, ISSN 0741-3335, E-ISSN 1361-6587, Vol. 44, A391-A398 p.Article in journal (Refereed) Published
Abstract [en]

For the first time, data from eight,different tokamaks have been combined in an international database for internal transport barriers (ITBs). An analysis of the data for the formation of an ITB with dominant ion heating shows a clear dependence of the threshold power on the minor radius and line-averaged electron density for the formation of ion ITBs. The dependence of ITB formation on the toroidal magnetic field is weak. For the formation of ITBs with dominant electron heating, the database is smaller, but for the threshold power a strong increase with plasma size and a weak toroidal field dependence could also be identified. Based on these results, an expression for the power required to form an ITB is given using global variables only. These results give a basis for the analysis of the database using local values (like magnetic shear) and a detailed comparison with theory-based models.

Place, publisher, year, edition, pages
2002. Vol. 44, A391-A398 p.
URN: urn:nbn:se:kth:diva-22717DOI: 10.1088/0741-3335/44/5A/342ISI: 000184555900043OAI: diva2:341415
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Hellsten, Torbjörn A. K.
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Alfvén Laboratory
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