Observation of Confined Current Ribbon in JET Plasmas
2010 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 104, no 18, 185003- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2010. Vol. 104, no 18, 185003- p.
IdentifiersURN: urn:nbn:se:kth:diva-27900DOI: 10.1103/PhysRevLett.104.185003ISI: 000277417500031ScopusID: 2-s2.0-77952063771OAI: oai:DiVA.org:kth-27900DiVA: diva2:383080
QC 201101042011-01-042011-01-032011-01-04Bibliographically approved