Experience with the Resistive Plate Chamber in the Babar Experiment

Details Experience with the Resistive Plate Chamber in the Babar Experiment Experience with the Resistive Plate Chamber in the Babar Experiment

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apsp.conf.1022b&link_type=abstract

ASTROPARTICLE, PARTICLE AND SPACE PHYSICS, DETECTORS AND MEDICAL PHYSICS APPLICATIONS . Proceedings of the 9th Conference . Held

Physics

Medical Physics

Scientific paper

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 and beam is high and stable. However, a few of the highest rate RPCs have suffered efficiency losses of 5-15%. Although constructed with improved techniques 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.

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