Upgraded Cherenkov time-of-flight detector for the AFP project

0570243 - FZÚ 2024 RIV US eng J - Journal Article
Nožka, L. - Avoni, G. - Banas, E. - Brandt, A. - Černý, K. - Davis, P.M. - Pinto, S.D. - Georgiev, V. - Hrabovský, M. - Komárek, T. - Korcyl, K. - Lopez-Paz, I. - Milovanovic, M. - Mladenovic, G. - Orlov, D.A. - Rijssenbeek, M. - Schovánek, Petr - Sýkora, T. - Trzebinski, M. - Urbášek, Vladimír - Zich, J.
Upgraded Cherenkov time-of-flight detector for the AFP project.
Optics Express. Roč. 31, č. 3 (2023), s. 3998-4014. ISSN 1094-4087
R&D Projects: GA MŠMT(CZ) LTT17018
Research Infrastructure: CERN-CZ II - 90104
Institutional support: RVO:68378271
Keywords : ToF * Cherenkov time-of-flight detector * AFP
OECD category: Particles and field physics
Impact factor: 3.8, year: 2022
Method of publishing: Open access

We present the results of our performance studies of the upgraded Cherenkov time-of-flight (ToF) detector for the AFP (ATLAS Forward Proton) project. The latest version consists of solid L-shaped fused silica bars, new customized ALD-coated micro-channel plate photomultipliers (MCP-PMTs) miniPlanacon XPM85112-S-R2D2 with an extended lifetime which operate at low gains (order of 103), and an updated construction. The improvements were aimed to increase the efficiency, the lifetime as well as the radiation hardness of the detector which has been designed to operate in high radiation areas (above 400 kGy/year). The detector was finally tested at the CERN-SPS test-beam facility (120 GeV pi+ particles) in August 2021 prior to its installation at the Large Hadron Collider at CERN. Measurements proved the detector kept its inner timing resolution of 20 ps despite the rather low gain of its photodetector and reduced optical throughput caused by inevitable changes in the detector geometry.
Permanent Link: https://hdl.handle.net/11104/0346941