Speaker
Description
The timing Resistive Plate Chambers (tRPCs) detectors are generally
characterized by a multi-gap structure with multiples floating high resistivity
glass electrodes. These features restrict their field of application to medium sized
areas experiments. In this presentation we show the performance of two
single thin-gap RPCs prototypes designed to work as an intermediate solution
between tRPCs and RPCs. The detectors are characterized by a 0.2 mm gas
gap, 0.4 mm thick phenolic glass electrodes and a Front-End electronics with
2 fC threshold. Phenolic glass, instead of bakelite, has been selected for its
mechanical strength even in thin sheets despite the high bulk resistivity. The
combination of this parameters allows to gain significant factors both in terms
of rate capability and temporal resolution. Test with 180 GeV/c muons beam
with and without gamma radiation background have been performed showing
the possibility of achieving a time resolution better than 150 ps, operating up to
4 kHz/cm2 at 80% of efficiency. This solution has been studied in two configurations:
two detectors with independent pick-up electrodes and gas volumes,
and one detector with one read-out electrode picking up the signal from two
shared gas volumes. The characterization of all the detector figures of merit is
described and compared to the traditional solutions.
