SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 126: Gas-Detecors, Detector Systems

T 126.6: Vortrag

Donnerstag, 23. März 2023, 17:05–17:20, WIL/C207

Reflective Coating for the SHiP Surround Background Tagger — •Patrick Deucher for the SHiP-SBT collaboration — Johannes Gutenberg Universität Mainz

The Surrounding Background Tagger (SBT) is a liquid scintillator-based detector in the SHiP Experiment. Divided into segments and embedded into the Corten steel structure of the Hidden Sector decay vessel, the SBT's main task will be the discrimination against beam-induced backgrounds. The efficiency of such a detector type can be increased by optimizing the light detection equipment, lowering the attennuation length of the scintillator (purification and addition of different fluorophores) and increasing the reflectivity of the inner detector walls. Following results of Photon Transport Simulations the application of a diffuse and highly reflective Bariumsulfate-based (OPRC by Berghof*Fluoroplastic*Technology*GmbH) coating to the inner detector walls is studied. After extensive reflectivity-, stability- and compatibility tests the reflective coating was applied to the SBT test cell for the test beam 2022 at the DESY facilities. This talk will discuss results of a first large scale application of the reflective coating in a liquid-scintillator detector cell.