The multi-pad PICOSEC-Micromegas is an improved detector prototype with a segmented anode, consisting of 19 hexagonal pads. Detailed studies are performed with data collected in a muon beam over four representative pads. We demonstrate that such a device, scalable to a larger area, provides excellent time resolution and detection efficiency. As expected from earlier single-cell device studies, we measure a time resolution of approximately 25 picoseconds for charged particles hitting near the anode pad centers, and up to 30 picoseconds at the pad edges. Here, we study in detail the effect of drift gap thickness non-uniformity on the timing performance and evaluate impact position based corrections to obtain a uniform timing response over the full detector coverage.
@article{arxiv.2012.00545,
title = {Timing performance of a multi-pad PICOSEC-Micromegas detector prototype},
author = {S. Aune and J. Bortfeldt and F. Brunbauer and C. David and D. Desforge and G. Fanourakis and M. Gallinaro and F. García and I. Giomataris and T. Gustavsson and F. J. Iguaz and M. Kebbiri and K. Kordas and C. Lampoudis and P. Legou and M. Lisowska and J. Liu and M. Lupberger and O. Maillard and I. Manthos and H. Müller and E. Oliveri and T. Papaevangelou and K. Paraschou and M. Pomorski and B. Qi and F. Resnati and L. Ropelewski and D. Sampsonidis and L. Scharenberg and T. Schneider and L. Sohl and M. van Stenis and A. Tsiamis and Y. Tsipolitis and S. E. Tzamarias and A. Utrobicic and R. Veenhof and X. Wang and S. White and Z. Zhang and Y. Zhou},
journal= {arXiv preprint arXiv:2012.00545},
year = {2021}
}