Ultrahigh vacuum system for ISABELLE full cell
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A vacuum system consisting of a 40 m long 8. 8-cm-diam stainless steel tube, pumped by seven pumping stations, has been assembled using automatic welding methods. All components have been fired at 950 degree C in a vacuum furnace at a pressure less than 1 multiplied by 10** minus **4 Torr. Each pumping station contains a Ti-sublimator, a 20 l/s ion pump and a UHV gage. After assembly, the entire system was baked out at 250 degree C for 24 h. A pressure less than 1 multiplied by 10** minus **1**1 Torr was reached after titanium flash. A discussion is presented of (a) surface treatment of stainless for 10** minus **1**1 Torr operation, (b) bake out and conditioning cycle to read 1 multiplied by 10** minus **1**1 Torr, and (c) leak checking at low pressures.
Journal of Vacuum Science and Technology
author list (cited authors)
Skelton, R., Briggs, J., Chou, T. S., Foerster, C., & Stattel, P.
complete list of authors
Skelton, R||Briggs, J||Chou, TS||Foerster, C||Stattel, P