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The study of electron cyclotron emission (ECE) at frequencies for which the plasma is optically thin may give information on electron density of thermal plasmas or may help to identify and diagnose suprathermal electrons. In addition, finite optical thickness may give rise to systematic errors in the standard measurement of electron temperature, at least near the plasma edge, such that boundaries in plasma parameters for a reliable temperature measurement should be identified. The results presented in this paper were obtained on FTU tokamak (major radius R(0) = 0.935 m, limiter radius a = 0.3 m, central toroidal magnetic field B(0) less than or equal to 8 T) by means of an absolutely calibrated Fourier transform spectrometer, with a time resolution of 5 ms and a spatial resolution of 0.03 m.

Additional information

Authors: BURATTI P, ENEA, Centro Ricerche Energia Frascati, Roma (IT);ZERBINI M, ENEA, Centro Ricerche Energia Frascati, Roma (IT)
Bibliographic Reference: Report: RT/NUCL/92/26 EN (1992) 9 pp.
Availability: Available from Servizio Studi e Documentazione, ENEA, Centro Ricerche Energia Frascati, C.P. 65-00044 Frascati, Roma (IT)
Record Number: 199310965 / Last updated on: 1994-11-29
Original language: en
Available languages: en