SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 147: Pixel/HV-Maps, Si/Diamond

T 147.3: Vortrag

Donnerstag, 23. März 2023, 18:00–18:15, REC/C213

Charge collection study of thin HV-MAPS — •David Maximilian Immig for the HD-HVMAPS collaboration — Physikalisches Institut Universität Heidelberg

High-voltage monolithic active pixel sensors (HV-MAPS) combine the advantages of MAPS with fast charge collection via drift in a reversely biased diode. The amount of collected signal charge is influenced by two factors, the applied bias voltage and a dependent unknown fraction due to diffusion from the undepleted region. The former, determines the depleted volume intended for charge collection, as well as the detector capacitance. In the case of ultra thin sensors (e.g. 50 um), the depletion depth is limited by the sensor thickness and a contribution by diffusion is no longer applicable at full depletion.
An measurement campaign with sensors of various thickness was performed to investigate and determine the size of these contributions. In this talk, first results extracted from this extensive data set are presented.