SURFACE CONDITIONING TECHNIQUE IN THE FTU VACUUM CHAMBER
The FTU vacuum wall is completely covered by thermal shields. In this work are described and discussed the wall conditioning techniques performed on 1:1 scale toroidal sector to assure the ultimate pressure foreseen (< 2.6 . 10-6- Pa). An ultimate pressure of 6.2.10-7- Pa has been obtained after baking at 190 degrees C. An improvement factor 8 in the ultimate pressure has been obtained by using glow discharge in H-2 for five hours at 100 degrees C. Influence of the geometry of the vacuum vessel has been discussed.
Bibliographic Reference: 14TH SOFT CONFERENCE, AVIGNON (FRANCE), SEPT. 8-12, 1986 VOL. 1, PP. 521-526 1895 P., 1986, VOL. 1 AND VOL. 2, ISBN 0 08 034935 8 WRITE TO PERGAMON PRESS, HEADINGTON HILL HALL, OXFORD, OX3 0BW (UK), PRICE: UKL 220 (FOR BOTH VOLS.)
Record Number: 1989126050401 / Last updated on: 1989-01-01
Available languages: en