Erlangen 2026 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 31: Scintillator Detectors I

T 31.4: Vortrag

Dienstag, 17. März 2026, 17:00–17:15, KH 01.014

Large liquid scintillator detectors in SHiP - Hardware and electronics — •Tilman Rock for the SHiP-SBT collaboration — Albert-Ludwigs-Universität, Freiburg, Germany

In the search for particles in the hidden sector, the SHiP (Search for Hidden Particles) experiment, a high-intensity, general-purpose beam-dump experiment, is in preparation. The primary objective is to search for weakly interacting particles within the GeV mass range, which requires a zero-background level. To this end, SHiP's large, helium-filled decay volume is encircled by the Surrounding Background Tagger (SBT), which is essentially a large array of about 900 individual mirror-polished aluminum cells filled with liquid organic scintillator. The SBT is designed to identify particles entering the decay volume and neutrino-induced reactions within it. To efficiently collect light, the cells have UV-reflective walls and wavelength-shifting optical modules (WOMs) for light collection. The collected light is detected by 40 silicon photomultipliers arranged in a circle, which are optically coupled to each of the WOMs. In this presentation, different types of optical coupling will be compared. Additionally, temperature-dependent gain variations will be compensated by changing the operating voltages. To measure the temperature-dependent breakdown voltages of the SiPMs, a dedicated test setup has been developed that measures the dark currents of entire arrays of 40 SiPMs for varying bias voltages and temperatures. The setup will be explained and first results will be presented.

Keywords: SHiP; Silicon photomultiplier; Liquid scintillator