Speaker
Description
In the framework of the ECFA‑DRD4 project, we have developed high‑precision Time‑of‑Flight (TOF) detectors based on thin, high‑refractive‑index Cherenkov radiators read out by arrays of silicon photomultipliers (SiPMs). The concept exploits the prompt nature of Cherenkov emission to achieve ultimate system‑level time resolution.
The main factors affecting the timing performance were investigated through comprehensive Monte Carlo simulations, whose predictions were subsequently validated with experimental beam‑test data. Prototype detectors equipped with Hamamatsu SiPM arrays and various window materials—including fused silica and MgF₂—were tested at the CERN PS T10 beam line using "off-the-shelf" readout electronics. A time resolution better than 30 ps was achieved at single SiPM pixel level with 100% charged‑particle detection efficiency. The measured time resolution shows the expected improvement with the number of fired SiPM channels, scaling approximately as (1/\sqrt{N_{\text{SiPM}}}) within experimental uncertainties.
These results demonstrate that a TOF detector based on thin fused‑silica radiators coupled to SiPM arrays represents a significant advancement for next‑generation particle‑identification systems targeting higher momenta and will be essential for pile‑up mitigation and 4D tracking in future high‑luminosity collider environments.
Future directions for further improving the already promising results achieved will also be discussed.