Browsing by Author "Franchi, J."

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Charged particle timing at sub-25 picosecond precision: The picosec detection concept
(Elsevier, 2019-08-21) Iguaz, F. J.; Bortfeldt, J.; Brunbauer, F. M.; David, C.; Desforge, D.; Fanourakis, G.; Franchi, J.; Gallinaro, M.; Garcia, F.; Giomataris, I; Gonzalez-Diaz, D.; Gustaysson, T.; Guyot, C.; Kebbiri, M.; Legou, P.; Liu, J.; Lupberger, M.; Maillard, O.; Manthos, I; Mueller, H.; Niaouris, V; Oliveri, E.; Papaevangelou, T.; Paraschou, K.; Pomorskif, M.; Qi, B.; Resnati, F.; Ropelewski, L.; Sampsonidis, D.; Schneider, T.; Schwemling, P.; Sohl, L.; van Stenis, M.; Thuiner, P.; Tsipolitis, Y.; Tzamarias, S. E.; Wang, X.; White, S.; Zhang, Z.; Zhou, Y.; Veenhof, Rob; Bursa Uludağ Üniversitesi/Fen Edebiyat Fakültesi/Fizik Bölümü.
The PICOSEC detection concept consists in a "two-stage" Micromegas detector coupled to a Cherenkov radiator and equipped with a photocathode. A proof of concept has already been tested: a single-photoelectron response of 76 ps has been measured with a femtosecond UV laser at CEA/IRAMIS, while a time resolution of 24 ps with a mean yield of 10.4 photoelectrons has been measured for 150 GeV muons at the CERN SPS H4 secondary line. This work will present the main results of this prototype and the performance of the different detector configurations tested in 2016-2018 beam campaigns: readouts (bulk, resistive, multipad) and photocathodes (metallic+CsI, pure metallic, diamond). Finally, the prospects for building a demonstrator based on PICOSEC detection concept for future experiments will be discussed. In particular, the scaling strategies for a large area coverage with a multichannel readout plane, the R&D on solid converters for building a robust photocathode and the different resistive configurations for a robust readout.
Precise timing with the picosec-micromegas detector
(Soc Italiana Fisica, 2020-01-01) Sampsonidis, D.; Bortfeldt, J.; Brunbauer, F.; David, C.; Desforge, D.; Fanourakis, G.; Franchi, J.; Gallinaro, M.; Garcia, F.; Giomataris, I; Gustavsson, T.; Guyot, C.; Iguaz, F. J.; Kebbiri, M.; Kordas, K.; Lampoudis, C.; Legou, P.; Liu, J.; Lupberger, M.; Maillard, O.; Maniatis, V; Manthos, I; Muller, H.; Oliveri, E.; Papaevangelou, T.; Paraschou, K.; Pomorski, M.; Resnati, F.; Ropelewski, L.; Schneider, T.; Schwemling, P.; Scorsone, E.; Sohl, L.; Van Stenis, M.; Thuiner, P.; Tsipolitis, Y.; Tzamarias, S. E.; Wang, X.; White, S.; Zhang, Z.; Zhou, Y.; Veenhof, R.; Bursa Uludağ Üniversitesi/Fen Edebiyat Fakültesi/Fizik Bölümü.; GJK-8031-2022
This work presents the concept of the PICOSEC-Micromegas detector to achieve a time resolution below 30 ps. PICOSEC consists of a two-stage Micromegas detector coupled to a Cherenkov radiator and equipped with a photo-cathode. The results from single-channel prototypes as well as the understanding of the detector in terms of detailed simulations and preliminary results from a multichannel prototype are presented.
Progress on the PICOSEC-micromegas detector development: Towards a precise timing, radiation hard, large-scale particle detector with segmented readout
(Elsevier, 2020-04-01) Kordas, K.; Bortfeldt, J.; Brunbauer, F.; David, C.; Desforge, D.; Fanourakis, G.; Franchi, J.; Gallinaro, M.; Garcia, F.; Giomataris, I.; Gonzalez-Diaz, D.; Gustavsson, T.; Guyot, C.; Iguaz, F. J.; Kebbiri, M.; Legou, P.; Liu, J.; Lupberger, M.; Maillard, O.; Maniatis, I.; Manthos, I.; Mueller, H.; Niaouris, V.; Oliveri, E.; Papaevangelou, T.; Paraschou, K.; Pomorski, M.; Qi, B.; Resnati, F.; Ropelewski, L.; Sampsonidis, D.; Schneider, T.; Schwemling, P.; Sohl, L.; van Stenis, M.; Thuiner, P.; Tsipolitis, Y.; Tzamarias, S. E.; Veenhof, R.; Wang, X.; White, S.; Zhang, Z.; Zhou, Y.; Veenhof, Rob; Bursa Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Fizik Bölümü.; GJK-8031-2022
This contribution describes the PICOSEC-Micromegas detector which achieves a time resolution below 25 ps. In this device the passage of a charged particle produces Cherenkov photons in a radiator, which then generate electrons in a photocathode and these photoelectrons enter a two-stage Micromegas with a reduced drift region and a typical anode region. The results from single-channel prototypes (demonstrating a time resolution of 24 ps for minimum ionizing particles, and 76 ps for single photoelectrons), the understanding of the detector in terms of detailed simulations and a phenomenological model, the issues of robustness and how they are tackled, and preliminary results from a multi-channel prototype are presented (demonstrating that a timing resolution similar to that of the single-channel device is feasible for all points across the area covered by a multi-channel device).