A large CdTe-based tomographic system has been installed two years ago on t
he TORE SUPRA tokamak, for a detailed investigation of the dynamics of fast
electrons generated by radio-frequency waves in Fusion plasmas, as a funct
ion of time, space and energy. With 59 chords and 8 energy channels per lin
e-of-sight, this diagnostic is the largest in the fusion community dedicate
d to hard X-ray studies emitted by the plasma between 20 and 200 keV. A des
cription of the tomography as well as its performance in the aggressive env
ironment (gamma, neutrons, time-varying magnetic field) is presented. (C) 2
001 Elsevier Science B.V. All rights reserved.