PoS - Proceedings of Science
Volume 414 - 41st International Conference on High Energy physics (ICHEP2022) - Detectors for Future Facilities, R&D, novel techniques
The u-RWELL technology or the pre-shower and muon detectors of the IDEA detector
R. Farinelli*, A. Amoroso, I. Balossino, G. Bencivenni, M. Bertani, V. Cafaro, G. Cibinetto, E. De Lucia, D. Dominici, F. Evangelisti, G. Felici, M. Gatta, I. Garzia, P. Giacomelli, M. Giovannetti, S. Gramigna, L. Lavezzi, M. Melchiorri, G. Mezzadri, G. Morello, G. Papalino, M. Poli Lener, M. Scodeggio and S. Sosio
Full text: pdf
Pre-published on: November 16, 2022
Published on: June 15, 2023
In view of the construction of a circular $e^+e^-$ collider, like FCC-ee, the scientific community of RD-FCC is conceiving the IDEA apparatus: the Innovative Detector for Electron-positron Accelerator.
The detector is composed, from the innermost region going outward, of a central tracker, the magnet, the pre-shower, the calorimeter and the muon system.
The micro-Resistive WELL technology has been proposed for the realization of the pre-shower and the muon counters with proper tuning of the detector parameters due to the different requirements of the two systems. In particular, the readout strip pitch will be 400$\,\mu$m for the pre-shower and 1$\,$mm for the muon stations. This is possible thanks to the industrialization of the production process, which started to make the technology cost-effective. A key role in this task is represented by the choice to make the apparatus systems modular.
Other requirements for the detectors are a spatial resolution of the order of 100$\,\mu$m for the pre-shower and a reasonable total number of front-end channels for the muon system.
The optimization of the surface resistivity with a fixed strip pitch was achieved by the construction of a set of prototypes with an active area of 5$\times$40$\,$cm$^{2}$ and 40$\,$cm long strips. For the pre-shower prototypes, the resistive stage has been chosen with a surface resistivity $\rho_S$ ranging from 10 to 80$\,$M$\Omega/\square$, while for the muon ones $\rho_S$ is about 20$\,$M$\Omega/\square$. All these detectors have been exposed in October 2021 to a muon/pion beam at the CERN SPS. The very positive results obtained open the way for a completely new and competitive MPDG tracking device for high-energy physics experiments.
DOI: https://doi.org/10.22323/1.414.0333
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