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Abstract

Graphite is an interesting material for plasma-facing components in fusion experiments, mainly because of its low atomic number and its excellent thermal properties. Nevertheless, it contains a large amount of gaseous impurities, which can be released by plasma-surface interaction, and affect the purity of the deuterium-tritium plasma. To investigate the outgassing behaviour of graphites, CFCs and doped C composites, a facility has been set up to perform outgassing tests on samples (dimensions 0.02 x 0.02 x 0.005 m), as a function of temperature in the range between 373 and 1873 K. The experimental apparatus, designed to work in UHV conditions, allows outgassing measurements by a quadrupole mass spectrometer (1-200 AMU), using two different methods. This report describes the test facility, the quadrupole calibration and quantitative outgassing measurements on SEP CARB N112 and DUNLOP V graphites.

Additional information

Authors: ENEA, ENEA, Centro Ricerche Energia Frascati, Roma (IT)
Bibliographic Reference: Report: ENEA RT/ERG/FUS/93/17 EN (1993) 66 pp.
Availability: Available from Servizio Studi e Documentazione, ENEA, Centro Ricerche Energia Frascati, C.P. 65-00044 Frascati, Roma (IT)
Record Number: 199411242 / Last updated on: 1994-11-25
Category: PUBLICATION
Original language: en
Available languages: en
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