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- Solano, E. R., et al.
(author)
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Observation of Confined Current Ribbon in JET Plasmas
- 2010
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In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 104:18, s. 185003-
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Journal article (peer-reviewed)abstract
- We report the identification of a localized current structure inside the JET plasma. It is a field-aligned closed helical ribbon, carrying current in the same direction as the background current profile (cocurrent), rotating toroidally with the ion velocity (corotating). It appears to be located at a flat spot in the plasma pressure profile, at the top of the pedestal. The structure appears spontaneously in low density, high rotation plasmas, and can last up to 1.4 s, a time comparable to a local resistive time. It considerably delays the appearance of the first edge localized mode.
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