SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 124: Si-Strip/CMS, Pixel/DMAPS
T 124.5: Vortrag
Donnerstag, 23. März 2023, 16:50–17:05, WIL/C307
Characterisation of a DMAPS prototype for BELLE II a proposed Vertex Detector Upgrade — •Marike Schwickardi1, Benjamin Schwenker1, Ariane Frey1, Yannik Buch1, Maximilian Babeluk2, Bernhard Pilsl2, Patrick Sieberer2, Christian Irmler2, and Jérôme Baudot3 — 1Georg-August-Universität Göttingen, Deutschland — 2HEPHY, Wien, Österreich — 3IPHC, Straßburg, France
The SuperKEKB collider in Japan is an asymmetric electron-positron collider at a center-of-mass energy of 10.58 GeV. A world record peak luminosity of 4.7·1034 cm−2s−1 was achieved during the last run period in June 2022. The peak luminosity is planned to be ramped up incrementally to the design value of 6.5 ·1035 cm−2s−1. During the long shutdown tentatively scheduled for 2026/2027 an upgrade for the vertex detector is planned, to improve the detectors performance, robustness against beam-induced backgrounds and simplify servicing the system. Proposed is a fully pixelated 5 layer vertex detector (VXD) concept, based on the CMOS-DMAPS technology. The proposed chip is named OBELIX and is a further development based of the TJ-MONOPIX2 produced in the Tower 180 nm process, as a replacement of the current pixel-and-strip vertex detector concept.
To ensure the design specification for the OBELIX chip are met, the predecessor TJ-MONOPIX2, was characterised in laboratory measurements and during a beam test at DESY in June 2022. The results obtained from these measurements are implemented in simulations in the Belle II Analysis Framework for more realistic performance studies.