Speaker
Alessandro Paoloni
(LNF)
Description
OPERA is an experiment dedicated to the observation of numu into
nutau oscillations through tau appearance on the CNGS beam.
The experiment is composed by two identical super-modules, each
with a target section (made of emulsion/lead bricks alternated to
a scintillator Target Tracker) and a muon spectromter (instrumented
with bakelite electrodes RPCs and drift tubes).
The OPERA RPC system is composed of about 1000 RPCs for an
instrumented area of 3000 m2.
The RPCs are operated in streamer mode and flushed with the gas mixture
Ar/R134a/isobutane/SF6=75.4/20/4/0.6 at five refills/day in open flow.
The present performances of the RPC system after six years of
operation are presented.
The aging status of the detector is also described.
Primary author
Alessandro Paoloni
(LNF)
