DocumentCode
906932
Title
An Electromagnetic Calorimeter for Use in a Strong Magnetic Field at LEP Based on CEREN 25 Lead Glass and Vacuum Photo-Triodes
Author
Brown, R.M. ; Evans, W.M. ; Gee, C.N.P. ; Jeffreys, P.W. ; Patrick, G.N. ; Rousseau, M.D. ; Saunders, B.J. ; Sproston, M.
Author_Institution
Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OXll OOX
Volume
32
Issue
1
fYear
1985
Firstpage
736
Lastpage
740
Abstract
The end-caps of the lead glass calorimeter being built for the OPAL experiment at LEP will be required to operate in axial magnetic fields up to 1 Tesla. The technique adopted uses CEREN 25 glass instrumented with vacuum photo-triodes (single stage photomultipliers). We report results from tests on single modules in electron beams while subject to strong magnetic fields, which prove the viability of this design. The method results in excellent linearity, resolution and stability. The best energy resolution so far achieved is 5.3%//E at zero field with a degradation of less than 1.0%//E for magnetic fields up to 1 Tesla.
Keywords
Electromagnetic fields; Electron beams; Energy resolution; Glass; Instruments; Linearity; Magnetic fields; Photomultipliers; Testing; Vacuum technology;
fLanguage
English
Journal_Title
Nuclear Science, IEEE Transactions on
Publisher
ieee
ISSN
0018-9499
Type
jour
DOI
10.1109/TNS.1985.4336933
Filename
4336933
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