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Based on the ITER edge database, comparisons among the major tokamaks with respect to systematic SOL-width behaviour are presented in terms of free-form regression analysis. Emphasis is placed on OH-L plasmas as this data is most abundant and coherent. Despite differences in size, wall-conditioning and divertor configuration, broadly similar trends are found in the regimes of low- and high-recycling and partially-detached divertor operation. In the low-recycling regime all machines appear to underlie a size scaling. Operation at high q95, high densities with respect to the Greenwald limit, or high powers leads to SOL widths considerably in excess of the values indicated by this simple scaling, and are documented in the form of machine-specific or machine-group-specific parametric expressions.

Additional information

Bibliographic Reference: Article: Journal of Nuclear Materials, 266-269 (1999), 99-108
Record Number: 199910758 / Last updated on: 1999-05-21
Original language: en
Available languages: en