DocumentCode :
828436
Title :
Ultrahigh Vacuum Technology for Storage Rings
Author :
Fischer, E.
Author_Institution :
CERN Geneva, Switzerland
Volume :
24
Issue :
3
fYear :
1977
fDate :
6/1/1977 12:00:00 AM
Firstpage :
1227
Lastpage :
1232
Abstract :
Present UHV technology permits producing pressures of 10-9 to 10-11 torr in the aperture-limited vacuum chambers of storage rings. Very disturbing pressure rises occur in electron storage rings from synchrotron light and in proton storage rings from ion bombardment. This has prompted the development of special cleaning and bakeout procedures on chambers before installation and in situ. In some cases, cleaning and baking alone are not sufficient and a pumping action distributed all along the pipes must be provided for. A controversy exists whether one should use, for future superconducting storage rings, a cold (4 K), cool (77 K) or warm (293 K) bore vacuum chamber. Experiments are in progress to supply the basic facts needed for taking decisions.
Keywords :
Cleaning; Electrons; Laser excitation; Manufacturing; Ovens; Particle beams; Protons; Storage rings; Synchrotrons; Vacuum technology;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/TNS.1977.4328903
Filename :
4328903
Link To Document :
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