Bonn 2020 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 50: Instrumentation XII

HK 50.4: Talk

Thursday, April 2, 2020, 15:00–15:15, J-HS K

Test beam results for the SiPM readout electronics of the crystal Zero Degree Detector for BESIII — •Yasemin Schelhaas, Igor Beltschikow, Achim Denig, Peter Drexler, Werner Lauth, and Saskia Plura for the BESIII collaboration — Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, Deutschland

The BESIII experiment is situated at the e⁺e⁻ collider BEPCII at the Institute of High Energy Physics in Beijing, China. It is designed to study hadron and τ-charm physics to high accuracy. The investigation of processes in which particles are emitted under strongly forward and backward peaked angles, however, suffers from a limited detection efficiency. For this purpose, a small angle calorimeter is currently under construction, the crystal Zero Degree Detector (cZDD). It consists of two arrays of scintillating LYSO crystals that are separated by a gap to reduce the impact of the high flux of low energetic photons from Bhabha scattering processes. The scintillation light is collected by silicon photomultipliers (SiPMs).

In this contribution, results of a test beam time in July 2019 at the MAMI electron accelerator in Mainz are presented. During this beam time the SiPM readout electronics were tested with regard to saturation effects.

Supported by DFG SFB 1044.