Nature of monster sawteeth and their relationship to Alfven instabilities in tokamaks
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.
Bernabei
S
Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA.
Bell
MG
Budny
RV
Fredrickson
ED
Gorelenkov
NN
Hosea
JC
Majeski
R
Mazzucato
E
Phillips
CK
Schilling
G
Wilson
JR