Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 42: Detector Systems 1

T 42.2: Vortrag

Dienstag, 22. März 2022, 16:35–16:50, T-H27

Studies to improve the light absorption of wavelength-shifting optical modules in the SHiP experiment — •Jakob Schmidt for the SBT collaboration — Humboldt-Universität zu Berlin, Berlin, Germany

The usage of wavelength-shifting optical modules (WOMs) as photon detectors was first proposed for the IceCube large-volume extension and then also for large-area liquid scintillator detectors as the SHiP surrounding background tagger (SBT). A WOM is a light-guiding tube coated with a UV light-absorbing paint that emits secondary photons in the visible spectrum. By total internal reflection inside the tube walls, these photons are guided to the actual photon detector, which in this case is made of a ring array of silicon photomultipliers that is coupled to one end of the tube. The light detection efficiency depends significantly on the light absorption in the wavelength shifter. This talk will present studies of coating methods to improve the light absorption in WOMs. This work is funded by the DFG.