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HK: Fachverband Physik der Hadronen und Kerne

HK 16: Instrumentation III

HK 16.2: Vortrag

Dienstag, 12. März 2024, 16:15–16:30, HBR 19: C 1

Status of irradiation studies with MIMOSIS-1 Sensors* — •Benedict Arnoldi-Meadows for the CBM-MVD collaboration — Goethe-Universität Frankfurt

Due to the fixed target geometry of the cbm experiment, its Micro Vertex Detector will be exposed to a strong gradient in terms of total ionizing dose (tid). It is foreseen to equip this detector with cmos Monolithic Active Pixel Sensors called mimosis. This sensor is currently being developed in a R & D project between Goethe-University Frankfurt, iphc Strasbourg and gsi and is supposed to withstand such a radiation dose gradient. This gradient calls for operating pixels on the same sensor being irradiated to tids between 0 and 5 MRad with the same detection threshold and steering parameters.

While the tolerance of the sensor to a uniform radiation dose of 5 MRad was established in earlier studies with the first full-sized protoype called mimosis-1, its tolerance to such strong dose gradients remains to be demonstrated. This contribution will present the results of dedicated laboratory studies with mimosis-1 addressing this issue.

*This work has been supported by bmbf (05P21RFFC2), gsi, Eurizon, hgs-hire, and hfhf.

Keywords: MIMOSIS; CBM; Micro Vertex Detector; Pixel Sensor; FAIR