DocumentCode :
839292
Title :
Implications of the Low Field Levels in the LEP Magnets
Author :
Gourber, J.P. ; Resegotti, L.
Author_Institution :
ISR Division, CERN CH-1211 Geneva 23
Volume :
26
Issue :
3
fYear :
1979
fDate :
6/1/1979 12:00:00 AM
Firstpage :
3185
Lastpage :
3187
Abstract :
For the C-shaped laminated magnet cores, which have been adopted in the recent versions of LEP, advantage has been taken of the required low field levels to reduce the filling factor to less than one third. This both improves the performance and considerably reduces the price of the magnets. Starting from magnetic measurements on different steels, and by using a semi-quantitative model, it is shown that a satisfactory field uniformity can be maintained at an injection field of 0.017 T with a medium grade, low carbon steel, owing to the mutual compensation between the reduction in permeability with field level and the effect of coercivity. A novel method is being developed for fabricating these magnets using a cement mortar to fill the interlamination spaces and bind the laminations together. A 60 cm long, ¿-scale model has produced excellent mechanical and magnetic results.
Keywords :
Coercive force; Filling; Lamination; Length measurement; Magnetic cores; Magnetic field measurement; Magnets; Permeability; Saturation magnetization; Steel;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/TNS.1979.4329978
Filename :
4329978
Link To Document :
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