Bonn 2020 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 38: Instrumentation VII

HK 38.9: Talk

Wednesday, April 1, 2020, 18:45–19:00, J-HS C

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

The Electromagnetic Calorimeter (EMC) will be a main component of the upcoming PANDA experiment at the future FAIR complex in Darmstadt. Due to the aimed energy resolution, timing and spacial constraints the individual high-voltage adjustments for the Large Area Avalanche Photodiodes (LAAPDs) demands innovative and specialized electronics, such as, for example, the individual bias-voltage adjustments for the Photodiodes needs to be accurate down to 0.1V. In the same time, no space can be occupied in the inner detector volume 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 have been compared and their impact on the resulting high voltage adjustment will be presented in this talk.

*gefördert durch das BMBF, GSI und HIC for FAIR.