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A recent experimental study of impurity production and penetration for various density regimes is described. Deuterium and carbon emissions near a neutralizer plate (NP) of the Tore Supra ergodic divertor (ED) has been measured with an absolutely calibrated visible endoscope, for high- and low-density plasma regimes. From these radiation measurements, an effective carbon flux has been deduced, and at an order-of magnitude estimate of the NP erosion: 50m for the fall 1999 experimental ED campaign (approximately 500 shots). Combining the measured carbon and deuterium fluxed, a global experimental carbon sputtering yield for the NP has been deduced in the range 2 x 10E-2 3 x 10E-1 for ohmic pulses, showing evidence of the importance of carbon self-sputtering.

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Authors: POSPIESZCZYK A, Forschungszentrum J?lich GmbH, Institut f?r Plasmaphysik (DE);HOGAN J, Oak Ridge National Laboratory, Fusion Energy Division, Oak Ridge, TN (US);CORRE Y ET AL, CEA, Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An article published in: Journal of Nuclear Materials, Vol.290-293 (2001), pp.250-254
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