Characterisation of radiation and flux measurements on a neutraliser plateof the Tore Supra ergodic divertor

A recent extensive experimental study of impurity production and penetratio n for various density regimes is described. Deuterium and carbon emissions near a neutraliser plate (NP! of the Tore Supra Ergodic Divertor (ED) has b een measured with an absolutely calibrated visible endoscope, for high- and low-density plasma regimes. From these radiation measurements, we have ded uced an effective carbon flux, and at an order-of-magnitude estimate of the NP erosion: 50 m for the fall 1999 experimental ED campaign (approximate t o 500 shots). Combining the measured carbon and deuterium fluxes, we deduce a global experimental carbon sputtering yield for the NP in the range 2 x- 10(-2)-3 x 10(-1) for ohmic pulses, showing evidence of the importance of c arbon self-sputtering, (C) 2001 Elsevier Science B.V. All rights reserved.