학술논문
Towards robust PICOSEC Micromegas precise timing detectors
Document Type
Working Paper
Author
Lisowska, Marta; Angelis, Yannis; Aune, Stephan; Bortfeldt, Jonathan; Brunbauer, Florian; Chatzianagnostou, Evridiki; Dehmelt, Klaus; Desforge, Daniel; Fanourakis, George; Floethner, Karl Jonathan; Gallinaro, Michele; Garcia, Francisco; Garg, Prakhar; Giomataris, Ioannis; Gnanvo, Kondo; Gustavsson, Thomas; Iguaz, Francisco Jose; Janssens, Djunes; Kallitsopoulou, Alexandra; Kovacic, Marinko; Legou, Philippe; Liu, Jianbei; Lupberger, Michael; Malace, Simona; Maniatis, Ioannis; Meng, Yue; Muller, Hans; Oliveri, Eraldo; Orlandini, Giorgio; Papaevangelou, Thomas; Pomorski, Michal; Ropelewski, Leszek; Sampsonidis, Dimos; Scharenberg, Lucian; Schneider, Thomas; Scorsone, Emmanuel; Sohl, Lukas; van Stenis, Miranda; Tsipolitis, Yorgos; Tzamarias, Spyros; Utrobicic, Antonija; Veenhof, Rob; Wang, Xu; White, Sebastian; Zhang, Zhiyong; Zhou, Yi
Source
Subject
Language
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.