Performance studies of new optics for the time-of-flight detector of the AFP project

0537838 - ÚJF 2021 RIV US eng J - Journal Article
Nožka, L. - Brandt, A. - Černý, K. - Hrabovský, M. - Komárek, T. - Křížek, Filip - Mandát, Dušan - Milovanovic, M. - Rijssenbeek, M. - Schovánek, Petr - Sýkora, T. - Urbášek, Vladimír - Zatloukal, Jaromír
Performance studies of new optics for the time-of-flight detector of the AFP project.
Optics Express. Roč. 28, č. 13 (2020), s. 19783-19796. ISSN 1094-4087
R&D Projects: GA MŠMT LM2015056; GA MŠMT(CZ) LM2018104; GA MŠMT EF16_013/0001403
Institutional support: RVO:68378271 ; RVO:61389005
Keywords : Germanium compounds * radiation damage * Time of Flight detectors
OECD category: Nuclear physics; Particles and field physics (FZU-D)
Impact factor: 3.894, year: 2020
Method of publishing: Open access
https://doi.org/10.1364/OE.394582

We present the results of performance studies of the upgraded optical part of the time-of-flight subdetector prototype for the AFP (ATLAS Forward Proton) detector obtained during the test campaign in a synchrotron test-beam facility with 5 GeV electrons at the DESY laboratory (Hamburg, Germany) in June 2019. The detection of the particle arrival time is based on generation of Cherenkov light in an L-shaped fused silica bar. In the previous version of the ToF, all bars were made of two pieces (radiator and light guide) glued together with a dedicated glue (Epotek 305). This solution suffers from additional radiation damage of glue. We adopted a new technique of bar production without the need of glue. The new bars have a higher optical throughput by a factor of 1.6, reduced fragility, and better geometrical precision.
Permanent Link: http://hdl.handle.net/11104/0315669