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

L. Sohl, J. Bortfeldt, Florian M. Brunbauer, C. David, D. Desforge, G. Fanourakis, J. Franchi, M. Gallinaro, F. Garcia, I. Giomataris, D. González-Díaz, T. Gustavsson, C. Guyot, F.J. Iguaz, M. Kebbiri, Kostas Kordas, P. Legou, J. Liu, Michael Lupberger, I. ManthosH. Muller, V. Niaouris, E. Oliveri, T. Papaevangelou, K. Paraschou, M. Pomorski, B. Qi, F. Resnati, L. Ropelewski, D. Sampsonidis, T. Schneider, P. Schwemling, E. Scorsone, M. van Stenis, Patrik Thuiner, Y. Tsipolitis, S.E. Tzamarias, Rob Veenhof, X. Wang, S. White, Z. Zhang, Y. Zhou

Research output: Contribution to journalConference articleScientificpeer-review


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.
Original languageEnglish
Article number012012
JournalJournal of Physics : Conference Series
Issue number1
Number of pages7
Publication statusPublished - 12 Sep 2019
MoE publication typeA4 Article in conference proceedings
Event9th international symposium on “Large TPCs for low-energy rare event detection” - Paris, France
Duration: 12 Dec 201814 Dec 2018
Conference number: 9

Fields of Science

  • 114 Physical sciences

Cite this

Sohl, L., Bortfeldt, J., Brunbauer, F. M., David, C., Desforge, D., Fanourakis, G., ... Zhou, Y. (2019). PICOSEC-Micromegas: Robustness measurements and study of different photocathode materials. Journal of Physics : Conference Series, 1312(1), [012012]. https://doi.org/10.1088/1742-6596/1312/1/012012