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Abstract

Measurements of Ion Cyclotron Emission (ICE) from JET tokamak plasmas have been using ICRF antennae on the low field side. From ohmically heated D**+ plasmas a spectrum rich in harmonic peaks was detected in the range (10-100) MHz. The harmonic spacing is proportional to the magnetic field strength and the intensity depends approximately ? exponentially on the plasma current. Within operational limits, variations in plasma density did not appear to play a role. ICRF heated plasmas, on the other hand, emit a complex spectrum with harmonics of the RF generator frequency (f-o) as well as new peaks at nf-o/2 (n = 1, 3, 5...). The absolute ICE intensity has, for the ohmic case, been compared with the expected blackbody level of the ion cyclotron emission.

Additional information

Authors: COTTRELL G A JET JOINT UNDERTAKING, ABINGDON (UK), JET JOINT UNDERTAKING, ABINGDON (UK)
Bibliographic Reference: WRITE TO THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON, OX14 3EA (UK), MENTIONING REPORT JET-P(85)13, 1985
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