Towards robust PICOSEC Micromegas precise timing detectors
Abstract
The PICOSEC Micromegas (MM) detector is a precise timing gaseous detector consisting of a Cherenkov radiator combined with a photocathode and a MM amplifying structure. A 100-channel non-resistive PICOSEC MM prototype with 10x10 cm^2 active area equipped with a Cesium Iodide (CsI) photocathode demonstrated a time resolution below 18 ps. The objective of this work is to improve the PICOSEC MM detector robustness aspects; i.e. integration of resistive MM and carbon-based photocathodes; while maintaining good time resolution. The PICOSEC MM prototypes have been tested in laboratory conditions and successfully characterised with 150 GeV/c muon beams at the CERN SPS H4 beam line. The excellent timing performance below 20 ps for an individual pad obtained with the 10x10 cm^2 area resistive PICOSEC MM of 20 MOhm/sq showed no significant time resolution degradation as a result of adding a resistive layer. A single-pad prototype equipped with a 12 nm thick Boron Carbide (B4C) photocathode presented a time resolution below 35 ps; opening up new possibilities for detectors with robust photocathodes. The results made the concept more suitable for the experiments in need of robust detectors with good time resolution.
Cite
@article{arxiv.2303.18141,
title = {Towards robust PICOSEC Micromegas precise timing detectors},
author = {Marta Lisowska and Yannis Angelis and Stephan Aune and Jonathan Bortfeldt and Florian Brunbauer and Evridiki Chatzianagnostou and Klaus Dehmelt and Daniel Desforge and George Fanourakis and Karl Jonathan Floethner and Michele Gallinaro and Francisco Garcia and Prakhar Garg and Ioannis Giomataris and Kondo Gnanvo and Thomas Gustavsson and Francisco Jose Iguaz and Djunes Janssens and Alexandra Kallitsopoulou and Marinko Kovacic and Philippe Legou and Jianbei Liu and Michael Lupberger and Simona Malace and Ioannis Maniatis and Yue Meng and Hans Muller and Eraldo Oliveri and Giorgio Orlandini and Thomas Papaevangelou and Michal Pomorski and Leszek Ropelewski and Dimos Sampsonidis and Lucian Scharenberg and Thomas Schneider and Emmanuel Scorsone and Lukas Sohl and Miranda van Stenis and Yorgos Tsipolitis and Spyros Tzamarias and Antonija Utrobicic and Rob Veenhof and Xu Wang and Sebastian White and Zhiyong Zhang and Yi Zhou},
journal= {arXiv preprint arXiv:2303.18141},
year = {2023}
}