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HK: Fachverband Physik der Hadronen und Kerne
HK 41: Instrumentation XI
HK 41.4: Vortrag
Mittwoch, 13. März 2024, 17:00–17:15, HBR 19: C 5a
Intermediate results from the series calibration of the Front-end Electronics of the barrel part of the PANDA EMC* — •Christopher Hahn1,2, Kai-Thomas Brinkmann1,2, and Hans-Georg Zaunick1,2 for the PANDA collaboration — 1Justus Liebig Universität, Giessen, Deutschland — 2II. Physikalisches Institut, Giessen, Deutschland
The Electromagnetic Calorimeter (EMC) inside a 2T solenoid will be the main component of the upcoming PANDA experiment at the future FAIR complex in Darmstadt. Due to the targeted energy resolution, timing and spatial constraints, individual high-voltage adjustments for the Large Area Avalanche Photodiodes (LAAPDs) and specifically tailored settings and architectures have to be chosen. In order to achieve optimal performance, a thorough understanding of the customized electronics as well as its behavior is crucial. Among others, the individual bias voltage adjustment of the photodiodes needs to be known with high accuracy. Simultaneously, space constraints limit the cable routing and connections, such as for the LAAPD bias voltage and control signals. The setup for the calibration of the high-voltage distribution and the test algorithm for the front-end electronics will be described. Furthermore, the intermediate results of the functionality tests and pre-calibration of the first 198 high-voltage distribution PCBs will be presented. *supported by BMBF, GSI und HFHF.
Keywords: Calibration; High Voltage; PANDA; EMC; Large Area Avalanche Photodiodes