Speaker
Description
For the next generation high interaction rate experiments or for the upgrade at higher luminosities of the running ones, the development of detectors with high counting rate capabilities and aging effects mitigation is a paramount topic in the detector research field. Using a low resistivity glass (~10$^{10}$ $\Omega$cm) in the assembling of timing Multi-gap Resistive Plate Chambers (MSMGRPCs), a high detection efficiency and excellent time resolution was proved up to 30 kHz/cm${^2}$, with exposure over the whole active area. To address the mitigation of the aging effects, a new MSMGRPC architecture, based on discrete spacers (replacing the classical fishing line) and direct injection of the gas flow through the gas gaps, was developed. Dedicated aging investigations of the chambers with the new design assessed the long-term performance. Direct flow MSMGRPCs, with the same inner geometry but with different granularities (5 cm$^2$, 8.6 cm$^2$ and 17.6 cm$^2$ readout cell/strip size) were assembled and preliminary tested in the detector laboratory. Different types of discrete spacers were investigated. The performance of the chambers assembled with the chosen type of spacers, (time resolution, efficiency and hit position resolutions), was further tested in-beam, in real operation conditions with reaction products, at SIS18 accelerator of GSI Darmstadt. In addition, in order to accurately evaluate their performance in the detection of minimum ionizing particles, they were tested in a cosmic-ray tracking setup. Construction details of the chambers, in-beam and cosmic ray experimental setups together with the obtained results in terms of high detection efficiency, very good time resolution and two-dimensional position resolutions in both in-beam and cosmic rays tests will be presented. Moreover, the integration of direct flow MSMGRPCs with different granularities in a large area module for a modular implementation in large scale high energy experiments will be discussed.