Observation of confined current ribbon in JET plasmas

E. R. Solano, P. J. Lomas, B. Alper, G. S. Xu, Y. Andrew, G. Arnoux, A. Boboc, L. Barrera, P. Belo, M. N.A. Beurskens, M. Brix, K. Crombe, E. De La Luna, S. Devaux, T. Eich, S. Gerasimov, C. Giroud, D. Harting, D. Howell, A. HuberG. Kocsis, A. Korotkov, A. Lopez-Fraguas, M. F.F. Nave, E. Rachlew, F. Rimini, S. Saarelma, A. Sirinelli, S. D. Pinches, H. Thomsen, L. Zabeo, D. Zarzoso

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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.

Original languageEnglish
Article number185003
JournalPhysical review letters
Volume104
Issue number18
DOIs
Publication statusPublished - May 7 2010

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Solano, E. R., Lomas, P. J., Alper, B., Xu, G. S., Andrew, Y., Arnoux, G., Boboc, A., Barrera, L., Belo, P., Beurskens, M. N. A., Brix, M., Crombe, K., De La Luna, E., Devaux, S., Eich, T., Gerasimov, S., Giroud, C., Harting, D., Howell, D., ... Zarzoso, D. (2010). Observation of confined current ribbon in JET plasmas. Physical review letters, 104(18), [185003]. https://doi.org/10.1103/PhysRevLett.104.185003