Experience with the BaBar resistive plate chambers

Author

Band, Henry R.

Author_Institution

Wisconsin Univ., Madison, WI, USA

Volume

5

fYear

2003

fDate

19-25 Oct. 2003

Firstpage

3735

Abstract

The BaBar detector has operated over 2000 m² of resistive plates chambers (RPCs) as muon and neutral hadron detectors since 1999. Most of the original RPC production have lost significant efficiency and many are now completely inefficient. Both the linseed oil used to coat the inner surfaces and the graphite coating on the outer surfaces are implicated as contributors to the efficiency loss which was accelerated by the operation of the RPCs at 29 to 34°C during the first summer. RPCs from 2 more recent production runs have been installed and tested. The most recent RPCs have exhibited stable efficiencies and high voltage plateaus during the first 8 months of service. Some have shown increased dark currents and noise rates.

Keywords

muon detection; position sensitive particle detectors; streamer chambers; 29 to 34 degC; 8 month; BaBar Resistive Plate Chambers; BaBar detector; RPC; dark currents; efficiency loss; graphite coating; linseed oil; muon detectors; neutral hadron detectors; noise rates; production runs; voltage plateaus; Detectors; Forward contracts; Insulation; Mesons; Petroleum; Production; Steel; Strips; Testing; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2003 IEEE

ISSN

1082-3654

Print_ISBN

0-7803-8257-9

Type

conf

DOI

10.1109/NSSMIC.2003.1352718

Filename

1352718