Raman spectroscopy and X-ray diffraction studies of some deposited carbon layers in Tore Supra
Carbon deposited layers collected in Tore Supra on the neutralizers, on the toroidal pumped limiter and on the vertical outboard limiter have been analyzed by X-ray diffraction and Raman spectroscopy. Both techniques show that are highly disordered, mainly consisting in graphite-like nanoparticles. They are not similar to amorphous or hydrogenated amorphous carbons: this is consistent with the low amount of deuterium found trapped inside. Their structure can be related to their vicinity to plasma, particle bombardment inducing high temperature and preventing full amorphization. Samples exposed to the highest fluence in the machine show the largest degree of disorder, with probably a minor contribution of three dimensional disorder which may be due to the formation of bonds with deuterium.
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: firstname.lastname@example.org
Record Number: 200417637 / Last updated on: 2004-07-13
Original language: en
Available languages: en