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Abstract

Deposited carbon layers observed in the tokamak Tore Supra have been sampled in order to quantify their deuterium content using D({3}He,p){4}He Nuclear reaction Analysis. The results show two trends coming out in Tore Supra: the D/C ratio in wetted deposited carbon layers is less than 1% and the D concentration depth profile decreases rapidly from the first micrometers of the plasma facing sub-surface, while the D/C ratio in shadowed carbon deposited layers reaches about 10% and shows a more constant profile along the probed depth. Although the present NRA measurements did not allow inventorying accurately the total D content in Tore Supra since all the carbon deposited layers were not examined and since the detection capability of the NRA technique is depth-limited, the estimated D inventory is to find to be about 6x10E22D.

Additional information

Authors: BROSSET C, Departement de Recherches sur la Fusion Controlee, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);KHODJA H, Laboratoire Pierre Sue, CEA/CNRS, CEA Saclay, Gif sur Yvette (FR)
Bibliographic Reference: An oral paper given at: 16th Int. Conf. on Plasma Surface Interaction in controlled Fusion Devices Organised by: Massachusetts Institute of Technology, Plasma Science & Fusion Center, Cambridge (US) Held at: Holiday Inn By The Bay, Portla
Availability: Available from Association EURATOM-CEA, Departement de Recherches sur la Fusion Controlee, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: dirdrfc@drfc.cad.cea.fr
Record Number: 200417579 / Last updated on: 2004-06-28
Original language: en
Available languages: en