Download Magnetic Island Dynamics under External Magnetic Perturbation in

Magnetic Island and Plasma Rotation under
External Resonant Magnetic Perturbation in the T-10 Tokamak
EX/P1-46
N.V. Ivanov1, L.G. Eliseev1, A.M. Kakurin1, A.V. Melnikov1,2, S.V. Perfilov1
1National Research Centre “Kurchatov Institute”, Moscow, Russia
2National Research Nuclear University MEPhI, Moscow, Russia
VMODE 
VExB 
[km/s]
VMODE
VExB
[km/s]
3.0
2.5
2.0
1.5
1.0
0.5
0.0
1.0
0.8
0.6
0.4
0.2
0.0
• Phase velocity of the mode rotation is
measured with a set of poloidal magnetic
field sensors
Modelling
Experiment
• Plasma rotation velocity at the q = 2
magnetic surface in the direction of the
mode phase velocity is measured with the
heavy ion beam diagnostic
0
1
2 3 4 5 6
-4
BAMPL [10 T]
7
0
1
2 3 4 5 6
-4
BAMPL [10 T]
Dependences of mode (blue crosses and
blue dash curves) and plasma (red circles
and red solid curves) velocities on mode
amplitude: average velocities (top panels)
and ranges of velocity fluctuations
(bottom panels)
7
• Fluctuations of both mode and plasma
velocities are observed at high mode
amplitude
• On the contrary, the mode velocity
fluctuations are not accompanied by
fluctuations of plasma velocity at low
mode amplitude  a decoupling between
mode and plasma rotation velocities due
to plasma resistivity