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| Master Thesis | PUBDB-2024-00529 |
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2024
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Please use a persistent id in citations: doi:10.3204/PUBDB-2024-00529
Abstract: Silicon Photo-Multipliers (SiPMs) are pixelated semiconductor detectors consisting of SPADs, usually used as single-photon sensitive detectors. SiPMs are often analog devices that require separate digitization. Combining SiPMs with digital readout known from modern pixel sensors offers new possibilities like full hitmap readout, pixel masking, or fast timestamping. Due to their potentially fast time stamping capabilities, digital SiPMs are becoming an interesting contender for 4D-Tracking in High Energy Physics. At DESY such a digital SiPM was developed. It is a monolithic chip manufactured in a 150 nm CMOS process by LFoundry. The chip has a 32 × 32 pixel matrix with 76 µm × 70 µm pixels and four on-chip TDCs that allow for time stamps with a resolution of less than 100 ps. It uses the Caribou DAQ system for a fully digital readout. The chip was tested in the DESY II test beam facility with a 4 GeV electron beam. In this thesis, the analysis procedure will be described and the results for the timing performance will be discussed. The time resolution was estimated to be (46 ± 5)ps in the center of the SPAD cells, while a slower response was found at the edge of the SPAD cells.
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