Speaker
Mirco Andreotti
(INFN Ferrara)
Description
The new barrel Instrumented Flux Return (IFR) of BABAR detector will be
reported here. Limited Stramer Tubes (LSTs) have been chosen to replace
the existing RPCs as active elements of the barrel IFR. The layout of the new
detector will be discussed: in particular, a cell bigger than the standard one
has been used to improve efficiency and reliability. The extruded profile is
coated with a resistive layer of graphite having a typical surface resistivity
between 0.2 and 0.4 MOhm/square. The tubes are assembled in modules
and installed in 12 active layers of each sextant of the IFR. The streamer
coordinate z (along the beam direction) is read out by detecting signals
induced on external strips, while the coordinate phi (azimuthal angle around
the beam direction) is read out by detecting signals on the wires. Innovative
solutions, as the Z-strip planes which cover each entire layer of a sextant
and are decoupled from the modules, will be discussed, as well as the
performance and the operating behavior of the detector.
Primary authors
Gianluigi Cibinetto
(INFN Ferrara)
Mirco Andreotti
(INFN Ferrara)
