SMuK 2021 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 11: Instrumentation IV

HK 11.2: Talk

Tuesday, August 31, 2021, 14:30–14:45, H4

Recent developments of the slow-control of the barrel part of the PANDA EMC front-end bus system* — •Christopher Hahn for the PANDA collaboration — II. Physikalisches Institut, Gießen,Deutschland

One of the main components of the upcoming PANDA experiment at the future FAIR complex in Darmstadt will be an Electromagnetic Calorimeter (EMC) inside a 2 T solenoid. Due to the required energy resolution, timing and spacial constraints, the individual high-voltage adjustments for the Large Area Avalanche Photodiodes (LAAPDs) that read out the EMC crystals demand innovative and specialized electronics, such as, for example, the individual bias voltage adjustments for the Photodiodes need to be accurate down to 0.1V. At the same time, space constraints in the inner detector volume limit options for individual cable routing and connections for the LAAPD bias voltage. The key elements of the high voltage adjustment concept will be described, with a special focus on the first and the second iteration of the dedicated control ASICs for the front-end bus system, the so-called SerialAdapter ASICs (SAA). The SAAs are also utilized for the communication and control of the APFEL preamplifier ASICs, which read out the APD photodetectors. The different versions of the SerialAdapter ASICs were utilized in the preproduction versions of the High-voltage control for the LAAPDs. The results of these preproduction tests will be presented. *gefördert durch das BMBF, GSI und HFHF.