ECE DIAGNOSTIC ON ITER IN THE PRESENCE OF

The E'ffects of superthermals on ECE T.-l1leasurf'ments ill t.he mre plasma of ITER are investi­ gat.ed on the basis of a model distribution function fo\' which a generalized Kirchhoff's law is valid. On varying both t.he spatial profiles and the position of t.he superthermals. the feasibility of T.­ measurements using the first harmonic ordinary-mode as well as the sE'cond harmonic extraordinary­ modE' is assessed in respect to the accuracy requirement. set by ITER.