title: Nature of monster sawteeth and their relationship to Alfven instabilities in tokamaks
abstract: A correlation is explored between the presence of energetic particle modes (EPM) and long-period sawtooth oscillations in tokamak plasmas heated by rf waves. The eventual crash of these sawteeth is explained in terms of the loss of the stabilizing fast particles due to the EPM. The absence of long-period sawteeth in high q(a) discharges is explained in terms of ion loss due to toroidal Alfven eigenmodes.
authors.affiliation: Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA.
authors.initials: S
authors.lastname: Bernabei
authors.initials: MG
authors.lastname: Bell
authors.initials: RV
authors.lastname: Budny
authors.initials: ED
authors.lastname: Fredrickson
authors.initials: NN
authors.lastname: Gorelenkov
authors.initials: JC
authors.lastname: Hosea
authors.initials: R
authors.lastname: Majeski
authors.initials: E
authors.lastname: Mazzucato
authors.initials: CK
authors.lastname: Phillips
authors.initials: G
authors.lastname: Schilling
authors.initials: JR
authors.lastname: Wilson