Photocathode characterisation for robust PICOSEC Micromegas precise-timing detectors
Abstract
The PICOSEC Micromegas detector is a~precise-timing gaseous detector based on a~Cherenkov radiator coupled with a~semi-transparent photocathode and a~Micromegas amplifying structure, targeting a~time resolution of tens of picoseconds for minimum ionising particles. Initial single-pad prototypes have demonstrated a~time resolution below 25 ps, prompting ongoing developments to adapt the concept for High Energy Physics applications, where sub-nanosecond precision is essential for event separation, improved track reconstruction and particle identification. The achieved performance is being transferred to robust multi-channel detector modules suitable for large-area detection systems requiring excellent timing precision. To enhance the robustness and stability of the PICOSEC Micromegas detector, research on robust carbon-based photocathodes, including Diamond-Like Carbon (DLC) and Boron Carbide (B4C), is pursued. Results from prototypes equipped with DLC and B4C photocathodes exhibited a~time resolution of approximately 32 ps and 34.5 ps, respectively. Efforts dedicated to improve detector robustness and stability enhance the feasibility of the PICOSEC Micromegas concept for large experiments, ensuring sustained performance while maintaining excellent timing precision.
Cite
@article{arxiv.2407.09953,
title = {Photocathode characterisation for robust PICOSEC Micromegas precise-timing detectors},
author = {M. Lisowska and R. Aleksan and Y. Angelis and S. Aune and J. Bortfeldt and F. Brunbauer and M. Brunoldi and E. Chatzianagnostou and J. Datta and K. Dehmelt and G. Fanourakis and S. Ferry and D. Fiorina and K. J. Floethner and M. Gallinaro and F. Garcia and I. Giomataris and K. Gnanvo and F. J. Iguaz and D. Janssens and A. Kallitsopoulou and M. Kovacic and B. Kross and C. C. Lai and P. Legou and J. Liu and M. Lupberger and I. Maniatis and J. McKisson and Y. Meng and H. Muller and R. De Oliveira and E. Oliveri and G. Orlandini and A. Pandey and T. Papaevangelou and M. Pomorski and M. Robert and L. Ropelewski and D. Sampsonidis and L. Scharenberg and T. Schneider and E. Scorsone and L. Sohl and M. van Stenis and Y. Tsipolitis and S. Tzamarias and A. Utrobicic and I. Vai and R. Veenhof and L. Viezzi and P. Vitulo and C. Volpato and X. Wang and S. White and W. Xi and Z. Zhang and Y. Zhou},
journal= {arXiv preprint arXiv:2407.09953},
year = {2024}
}