The reduction of neoclassical tearing modes by ECCD is demonstrated experimentally. It is
shown that with an averaged ECCD power of only 4-8% of the total heating power injected
into the discharge, the island width can be reduced by 40%, provided that the centre of
deposition is very close to the resonant surface. The reduction in mode amplitude results in
a partial recovery of the loss of stored energy induced by the mode. This experimental result
is well reproduced by modelling calculations.

The reduction of neoclassical tearing modes by ECCD is demonstrated experimentally. It is
shown that with an averaged ECCD power of only 4-8% of the total heating power injected
into the discharge, the island width can be reduced by 40%, provided that the centre of
deposition is very close to the resonant surface. The reduction in mode amplitude results in
a partial recovery of the loss of stored energy induced by the mode. This experimental result
is well reproduced by modelling calculations.