PICOSEC-Micromegas : Robustness measurements and study of different photocathode materials

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Sohl , L , Bortfeldt , J , Brunbauer , F M , David , C , Desforge , D , Fanourakis , G , Franchi , J , Gallinaro , M , Garcia , F , Giomataris , I , González-Díaz , D , Gustavsson , T , Guyot , C , Iguaz , F J , Kebbiri , M , Kordas , K , Legou , P , Liu , J , Lupberger , M , Manthos , I , Muller , H , Niaouris , V , Oliveri , E , Papaevangelou , T , Paraschou , K , Pomorski , M , Qi , B , Resnati , F , Ropelewski , L , Sampsonidis , D , Schneider , T , Schwemling , P , Scorsone , E , van Stenis , M , Thuiner , P , Tsipolitis , Y , Tzamarias , S E , Veenhof , R , Wang , X , White , S , Zhang , Z & Zhou , Y 2019 , ' PICOSEC-Micromegas : Robustness measurements and study of different photocathode materials ' , Journal of Physics : Conference Series , vol. 1312 , no. 1 , 012012 . https://doi.org/10.1088/1742-6596/1312/1/012012

Title: PICOSEC-Micromegas : Robustness measurements and study of different photocathode materials
Author: Sohl, L.; Bortfeldt, J.; Brunbauer, Florian M.; David, C.; Desforge, D.; Fanourakis, G.; Franchi, J.; Gallinaro, M.; Garcia, F.; Giomataris, I.; González-Díaz, D.; Gustavsson, T.; Guyot, C.; Iguaz, F.J.; Kebbiri, M.; Kordas, Kostas; Legou, P.; Liu, J.; Lupberger, Michael; Manthos, I.; Muller, H.; Niaouris, V.; Oliveri, E.; Papaevangelou, T.; Paraschou, K.; Pomorski, M.; Qi, B.; Resnati, F.; Ropelewski, L.; Sampsonidis, D.; Schneider, T.; Schwemling, P.; Scorsone, E.; van Stenis, M.; Thuiner, Patrik; Tsipolitis, Y.; Tzamarias, S.E.; Veenhof, Rob; Wang, X.; White, S.; Zhang, Z.; Zhou, Y.
Contributor: University of Helsinki, Helsinki Institute of Physics
Date: 2019-09-12
Language: eng
Number of pages: 7
Belongs to series: Journal of Physics : Conference Series
ISSN: 1742-6588
URI: http://hdl.handle.net/10138/311115
Abstract: Detectors with a time resolution of 20-30 ps and a reliable performance in highparticles flux environments are necessary for an accurate vertex separation in future HEPexperiments. The PICOSEC-Micromegas detector concept is a Micro-Pattern Gaseous Detector(MPGD) based solution addressing this particular challenge.The PICOSEC-Micromegasconcept is based on a Micromegas detector coupled to a Cherenkov radiator and a photocathode.In this detector concept, all primary electrons are initiated in the photocathode and the timejitter fluctuations are reduced. Different resistive anode layers have been tested with thegoal of preserving a stable detector operation in a high intensity pion beam. One importantcharacteristic of a gaseous detector in a high flux environment is the ion backflow (IBF). Thatcan cause damage to more fragile photocathode materials like CsI. Various types of photocathodematerials have been tested in order to find a robust solution against IBF bombardment.
Subject: 114 Physical sciences
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