Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 95: Pixel Detectors 3
T 95.2: Vortrag
Donnerstag, 24. März 2022, 16:30–16:45, T-H26
CMOS Upgrade of the Belle II Vertex Detector — •Marco Vogt, Christian Bespin, Ivan Dario Caicedo Sierra, Jochen Dingfelder, Tomasz Hemperek, Fabian Hügging, Hans Krüger, and Norbert Wermes — Physikalisches Institut der Universität Bonn
The Belle II experiment at KEK in Japan will have an opportunity for upgrades of its detector components during a long shutdown in 2027, when several upgrades of the SuperKEKB e+ e− collider are planned. At the expected high instantaneous luminosity of 6x1035 cm−2, SuperKEKB will generate a high rate of background particles, especially in the inner detector layers, the vertex detector. Here, hit rates will exceed 100 MHz cm−2, inducing radiation levels of 100 Mrad TID and fluences reaching 5x1014 neq cm−2. Such a high level of beam background will create new challenges and requirements that can be met by a new vertex detector.
A performant and robust vertex detector upgrade (VTX) is currently being defined by the Belle II collaboration. The baseline design foresees an all-layer pixel detector system based on the TJ-Monopix2 fully depleted monolithic CMOS sensor. For the inner layers of the VTX, a new ultra-thin all-silicon ladder concept is being developed and tested.
In this talk, the proposed monolithic CMOS upgrade will be presented. Technological aspects, system integration and performance estimations will be discussed.