The detailed electron temperature profile (spatial resolution: 0.86 cm
) of a low density JFT-2M plasma is measured with the TV Thomson scatt
ering system (TVTS). Flat profiles showing the electron temperature sh
apes of m = 2/n = 1 islands are presented, which are in contrast to th
at without islands. On the other hand, the m = 2/n = 1 islands are eff
ectively suppressed with local ECRH heating.