ECE IMAGING ON TEXT-U

The principles of plasma electron cyclotron (EC) radiometry are review ed. The aim is to lay the groundwork for discussion of new high perfor mance electron cyclotron emission (ECE) detectors. One example is that of heterodyne arrays. Preliminary results are presented of data obtai ned with a novel ECE imaging system on TEXT-U based on such an array. A variety of preliminary experiments have already been performed with this system where the ultimate space and time resolutions of ECE are a ttained. As examples we cite average electron temperature profile meas urements with 1 cm resolution, high frequency fluctuations and their v ertical chord correlation, magnetohydrodynamic mode reconstruction and magnetic island detection. (C) 1997 Elsevier Science S.A.