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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 large amounts of gaseous impurities, which can be released by plasma-surface interaction and which 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, 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. The test facility, the quadrupole calibration and quantitative outgassing measurements on SEP CARB N112 and DUNLOP V graphites are described.

Additional information

Authors: ALESSANDRINI C, ENEA, Centro Ricerche Energia Frascati, Roma (IT);APICELLA M L, ENEA, Centro Ricerche Energia Frascati, Roma (IT);VERDINI L, ENEA, Centro Ricerche Energia Frascati, Roma (IT)
Bibliographic Reference: Paper presented: 6th International Conference on Fusion Reactor Materials (ICFRM-6), Stresa (IT), September 27 - October 1, 1993
Availability: Available from (1) as Paper EN 37751 ORA
Record Number: 199311319 / Last updated on: 1994-11-28
Original language: en
Available languages: en
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