Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 42: Detector Systems 1
T 42.1: Gruppenbericht
Dienstag, 22. März 2022, 16:15–16:35, T-H27
The SHiP Surrounding Background Tagger — •Annika Hollnagel for the SBT collaboration — JGU Mainz
Within the CERN Physics Beyond Colliders (PBC) initiative, the SHiP fixed-target experiment is a frontrunner proposal for the SPS Beam-Dump Facility (BDF). Making use of the high-intensity SPS beam with 4 × 1019 protons on target per year, the experiment will combine the Search for Hidden Particles (SHiP) of masses up to 200 MeV/c2 - such as Heavy Neutral Leptons (HNL) and Light Dark Matter (LDM) - with studies of tau neutrino physics.
The Hidden Sector Decay Spectrometer (HSDS) of the SHiP detector consists of a large evacuated volume followed by a magnetic spectrometer and particle identification system. To enable a background-free study of the decays of feebly-interacting particles, the reduction of beam-induced background heavily relies on the Surrounding Background Tagger (SBT) that envelops the 50 m-long decay vessel. The current baseline for the SBT is a segmented Liquid Scintillator (LS) detector of LAB and PPO that is instrumented with Wavelength-shifting Optical Modules (WOM) and read out via SiPMs.
Since 2017, several test beam exposures of prototype detector cells have been conducted, supported by laboratory measurements and simulations. This talk will give a general overview on the SBT, summarise the state of the ongoing R&D, and present our plans for the next period of test beam measurements.