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Mhd stability limits to the operation parameters of the ft tokamak

TitleMhd stability limits to the operation parameters of the ft tokamak
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication1986
AuthorsAlladio, F., Bardotti G., Bartiromo R., Bracco G., Bombarda F., Buceti G., Buratti P., Caiaffa E., Cesario R., Crisanti F., De Angelis R., De Marco F., De Pretis M., Frigione D., Giannella R., Grolli M., Mancuso S., Marinucci M., Mazzitelli G., Orsitto F., Pericoli-Ridolfini V., Pieroni L., Podda S., Righetti G.B., Romanelli F., Santi D., Segre S.E., Tuccillo A.A., Tudisco O., Vlad G., Zanza V., and Iacono Roberto
JournalNuclear Fusion
Volume26
Pagination11-22
ISSN00295515
KeywordsDISCHARGES, INSTABILITIES, MAGNETOHYDRODYNAMICS, PLASMAS - Stability, TOKAMAK DEVICES
Abstract

{A systematic study of the macroscopic instabilities limiting the accessible operation parameters has been performed on the Ohmic discharges of the FT tokamak at BT = 40 and 60 kG. The MHD fluctuation behaviour and the modifications of the profiles associated with the precursor of the disruption are discussed in detail for the cases of breaking through qL, = 3, low-qL operation, disruptions at the high- density limit and disruptions following the disappearance of the sawtooth activity. In all these cases the power balance terms that appear associated with the development of the MHD instabilities are dominant either in the centre or at the edge of the discharge and so the transport in the intermediate confinement zone does not seem to be affected during the precursor of the disruption. The loop voltage negative spike of the disruption itself is found to be associated with the appearance of a burst of m = 3

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-0022463984&doi=10.1088%2f0029-5515%2f26%2f1%2f002&partnerID=40&md5=da1e9a04adc6607d78e30e304342bd2d
DOI10.1088/0029-5515/26/1/002
Citation KeyAlladio198611