Interplay between intrinsic plasma rotation and magnetic island evolution in disruptive discharges

• Type: Article in International Scientific Journal
• Date: 2016

Authors

G. Ronchi (Author) Other; J. H. F. Severo (Author) Other; F. Salzedas (Author) FEUP; R. M. O. Galvão (Author) Other; E. K. Sanada (Author) Other

Journal

Title: Plasma Physics Reports

Serial No. 1063-780X Vol. 42 No. 5

Pages: 465-471

ISSN: 1063-780X

Publisher: Pleiades Publishing

Indexing

ISI Web of Science

Scopus

INSPEC

Other information

DOI: 10.1134/S1063780X16050159

Abstract (EN): The behavior of the intrinsic toroidal rotation of the plasma column during the growth and eventual saturation of m/n = 2/1 magnetic islands, triggered by programmed density rise, has been carefully investigated in disruptive discharges in TCABR. The results show that, as the island starts to grow and rotate at a speed larger than that of the plasma column, the angular frequency of the intrinsic toroidal rotation increases and that of the island decreases, following the expectation of synchronization. As the island saturates at a large size, just before a major disruption, the angular speed of the intrinsic rotation decreases quite rapidly, even though the island keeps still rotating at a reduced speed. This decrease of the toroidal rotation is quite reproducible and can be considered as an indicative of disruption.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7