SMuK 2021 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 18: Instrumentation VI

HK 18.3: Vortrag

Mittwoch, 1. September 2021, 17:15–17:30, H2

Developement of a cooling system for the PANDA Barrel -EMC * — •Thorsten Erlen for the PANDA collaboration — II. Physikalisches Institut, JLU Gießen, Deutschland and for the PANDA Collaboration

The Electromagnetic Calorimeter (EMC) of the future PANDA-Experiment at the FAIR complex in Darmstadt will use lead tungsten scintillator crystals (PWO II). In its barrel part two Large Area Avalanche Photo Diodes (LAAPD) per crystal will be used to measure the amount of scintillation light created. Main characteristics of both the scintillator and the photosensors are temperature dependent. With decreasing temperature the light yield (photons per MeV) of the scintillators increases and the noise of the photosensors is reduced, while their gain-factor at a fixed voltage increases. The nominal operating temperature for the EMC is -25 °C to meet the desired properties and allow the EMC to perform according to the needs of the experiment. Energy resolution and threshold depend on a system that is capable of achieving and maintaining stable crystal and photosensor temperatures. Topic of this talk will be the ongoing developement of the cooling and monitoring system for the barrel part of the calorimeter. Methods in CAD design and simulation as well as design solutions will be presented in detail.

*gefördert durch das BMBF, GSI und HFHF.