DocumentCode
1057506
Title
A study of gas mixtures for the ATLAS MDT
Author
Zhao, T. ; He, L.
Author_Institution
Visual Techniques Lab., Washington Univ., Seattle, WA, USA
Volume
43
Issue
3
fYear
1996
fDate
6/1/1996 12:00:00 AM
Firstpage
1188
Lastpage
1193
Abstract
Results of a gas study for the ATLAS Monitored Drift Tubes (MDT) are reported. The electron drift velocity, Lorentz angle and tube radius to drift time relations are calculated for selected gas mixtures by using the CERN drift chamber simulation code GARFIELD/MAGBOLTZ. The drift tube efficiency, gas gain, avalanche size and self-quenching streamer (SQS) mode fraction as functions of anode voltage are measured by using radioactive sources. Discussions of the results, including effects of nitrogen and water vapor, are presented
Keywords
drift chambers; gas mixtures; streamer chambers; ATLAS; GARFIELD/MAGBOLTZ; H2O; Lorentz angle; Monitored Drift Tubes; N2; anode voltage; avalanche size; drift time; drift tube efficiency; electron drift velocity; gas gain; gas mixtures; radioactive source; self-quenching streamer mode fraction; tube radius; water vapor; Anodes; Atmosphere; Electron mobility; Helium; Hydrocarbons; Laboratories; Linearity; Nitrogen; Physics; Voltage;
fLanguage
English
Journal_Title
Nuclear Science, IEEE Transactions on
Publisher
ieee
ISSN
0018-9499
Type
jour
DOI
10.1109/23.506661
Filename
506661
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