Structure of low-frequency oscillations during the disruptive instability in the TFR tokamak

The behaviour of the m=0, n=0; m=1, n=1 and m=2, n=1 low-frequency oscillations has been studied within the framework of the current disruption in TFR. The experimental observations show the fundamental role of the m=2 mode in triggering and growth of the instability, the existence of two m=1 modes near the q=1 surface, one of which is directly connected with the m=2 mode. (author)