Speaker
Description
Future high-energy experiments require advanced gaseous detectors that combine excellent space and time resolution with high-rate capability and operational robustness in harsh environments. The μ-RWELL, a single-stage resistive Micro-Pattern Gaseous Detector developed by the authors, achieves typical gas gains of 2×10^4, space resolution below 100 μm, and time resolution in the range of 5-6 ns. To meet increasingly stringent performance demands, particularly for the LHCb muon system upgrade, we have developed the G-RWELL: a novel hybrid MPGD layout that integrates a single GEM pre-amplification stage atop a standard μ-RWELL.
The G-RWELL has been characterised through extensive laboratory and beam tests (in 2024 and 2025), demonstrating superior gain and timing performance compared to the classical μ-RWELL. Efficiency and time resolution were evaluated at the CERN T10-PS beamline using muon beams and a dedicated front-end electronics system (FATIC3), confirming the advantages of the two-stage amplification. A detailed comparison was carried out across different detector sizes (active areas of 10×10, 25×30, and 25×60 cm²). Moreover, various transfer gap distances (2 and 3 mm) were explored, enabling a thorough characterisation of the detector over a broad range of amplification, transfer, and drift field settings. This configuration significantly enhances detector performance, ensuring highly stable operation at gas gains up to 10^5 and achieving time resolutions down to 3.8 ns. Moreover, the increase in gas gain will open the possibility to use the detector as 2D tracker and preliminary tests have been performed in collaboration with EIC Rome Tor Vergata group, achieving space resolution better than 150um over a wide range of incidence angles (0-30°).
These results establish the G-RWELL as a robust and high-performance detector concept for the next generation of high-rate experimental environments.
| Position | Postdoc |
|---|---|
| Affiliation | Laboratori Nazionali di Frascati - INFN |
| Country | Italy |
