Single channel PICOSEC Micromegas detector with improved time resolution

Utrobičić, Antonija; Aleksan, R.; Angelis, Y.; Bortfeldt, J.; Brunbauer, F.; Brunoldi, M.; Chatzianagnostou, E.; Datta, J.; Dehmelt, K.; Fanourakis, G.; Fiorina, D.; Floethner, K.J.; Gallinaro, M.; Garcia, F.; Giomataris, I.; Gnanvo, K.; Iguaz, F.J.; Janssens, D.; Kallitsopoulou, A.; Kovacic, M.; Kross, B.; Legou, P.; Lisowska, M.; Liu, J.; Lupberger, M.; Maniatis, I.; McKisson, J.; Meng, Y.; Muller, H.; Oliveri, E.; Orlandini, G.; Pandey, A.; Papaevangelou, T.; Pomorski, M.; Ropelewski, L.; Sampsonidis, D.; Scharenberg, L.; Schneider, T.; Sohl, L.; van Stenis, M.; Tsipolitis, Y.; Tzamarias, S.E.; Vai, I.; Veenhof, R.; Vitulo, P.; Wang, X.; White, S.; Xi, W.; Zhang, Z.; Zhou, Y. (2024) Single channel PICOSEC Micromegas detector with improved time resolution. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1072 . ISSN 01689002

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Abstract

This paper presents design guidelines and the experimental verification of a single-channel PICOSEC Micromegas (MM) detector with an improved time resolution. The design encompasses the detector board, vessel, auxiliary mechanical parts, and electrical connectivity for high voltage (HV) and signals, focusing on improving the stability, reducing noise, and ensuring signal integrity to optimize timing performance. A notable feature is the simple and fast reassembly procedure, facilitating quick replacement of the detector internal components that allows for an efficient measurement strategy involving different detector components. The paper also examines the influence of parasitic capacitance and inductance on the output signal integrity. To validate the design, a prototype assembly and three interchangeable detector boards with varying readout pad diameters were manufactured. Detectors were initially tested in the laboratory. Finally, the timing performance of the detectors with different pad sizes was verified using 150 GeV muons. Notably, a record time resolution for a PICOSEC Micromegas detector technology with a CsI photocathode of 12.5 ± 0.8 ps was achieved for a detector with 10 mm diameter readout pad size.

Item Type:	Article
Uncontrolled Keywords:	micropattern gaseous detectors; micromegas; Cherenkov detectors; photocathode; timing detectors; picosecond timing
Subjects:	NATURAL SCIENCES > Physics NATURAL SCIENCES > Physics > Nuclear Physics
Divisions:	Division of Experimental Physics
Depositing User:	Ema Buhin Šaler
Date Deposited:	27 Mar 2026 11:08
URI:	http://fulir.irb.hr/id/eprint/11521
DOI:	10.1016/j.nima.2024.170127

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