Towards robust PICOSEC Micromegas precise timing detectors

(PICOSEC Micromegas) M. Lisowska; Y. Angelis; S. Aune; J. Bortfeldt; F. Brunbauer; E. Chatzianagnostou; K. Dehmelt; D. Desforge; G. Fanourakis; K.J. Floethner; M. Gallinaro; F. Garcia; P. Garg; I. Giomataris; K. Gnanvo; T. Gustavsson; F.J. Iguaz; D. Janssens; A. Kallitsopoulou; M. Kovacic; P. Legou; J. Liu; M. Lupberger; S. Malace; I. Maniatis; Y. Meng; H. Muller; E. Oliveri; G. Orlandini; T. Papaevangelou; M. Pomorski; L. Ropelewski; D. Sampsonidis; L. Scharenberg; T. Schneider; E. Scorsone; L. Sohl; M. van Stenis; Y. Tsipolitis; S.E. Tzamarias; A. Utrobicic; R. Veenhof; X. Wang; S. White; Z. Zhang; Y. Zhou (2023) Towards robust PICOSEC Micromegas precise timing detectors. Journal of Instrumentation, 18 . ISSN 1748-0221

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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 PICOSEC MM prototype with 10 × 10 cm2 active area equipped with a Cesium Iodide (CsI) photocathode demonstrated a time resolution below σ = 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 σ = 20 ps for an individual pad obtained with the 10 × 10 cm2 area resistive PICOSEC MM of 20 MΩ/□ 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 σ = 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.

Item Type:	Article
Uncontrolled Keywords:	Cherenkov detectors; Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc); Timing detectors
Subjects:	NATURAL SCIENCES > Chemistry BIOMEDICINE AND HEALTHCARE
Divisions:	Division of Experimental Physics
Depositing User:	Josipa Karadžole
Date Deposited:	24 Mar 2026 12:39
URI:	http://fulir.irb.hr/id/eprint/11440
DOI:	10.1088/1748-0221/18/07/C07018

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