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Performance of 2nd Generation BaBar Resistive Plate Chambers [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 2005.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
24 pages : digital, PDF file
Additional Creators:
Stanford Linear Accelerator Center, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
The BaBar detector has operated nearly 200 Resistive Plate Chambers (RPCs), constructed as part of an upgrade of the forward endcap muon detector, for the past two years. The RPCs experience widely different background and luminosity-driven singles rates (0.01-10 Hz/cm²) depending on position within the endcap. Some regions have integrated over 0.3 C/cm². RPC efficiency measured with cosmic rays is high and stable. The average efficiency measured with beam is also high. However, a few of the highest rate RPCs have suffered efficiency losses of 5-15%. Although constructed with improved techniques and minimal use of linseed oil, many of the RPCs, which are operated in streamer mode, have shown increased dark currents and noise rates that are correlated with the direction of the gas flow and the integrated current. Studies of the above aging effects are presented and correlated with detector operating conditions.
Report Numbers:
E 1.99:slac-pub-11044
slac-pub-11044
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Note:
Published through SciTech Connect.
07/12/2005.
"slac-pub-11044"
Nuclear Instruments and Methods in Physics Research, Section A 552 ISSN 0168-9002; NIMAER FT
Lange, D.J.; Wright, D.M.; Calabrese, R.; Cheng, C.H.; Pappagallo, M.; Finocchiaro, G.; Calcaterra, A.; de Sangro, R.; Messner, R.; Piccolo, M.; Patteri, P.; Bettoni, D.; Luppi, E.; Baldini, R.; Zallo, A.; Anulli, F.; Wisniewski, William J.; Cibinetto, G.; Andreotti, M.; Negrini, M.; Capra, R.
Funding Information:
AC02-76SF00515
View MARC record | catkey: 14708998