Bonn 2020 – wissenschaftliches Programm
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T 82.6: Vortrag
Donnerstag, 2. April 2020, 17:45–18:00, L-2.004
Irradiation burst study of Belle II PXD module components — Florian Bernlochner1, Jochen Dingfelder1, Martin Hensel3, Matthias Hoek2, Florian Lütticke1, Botho Paschen1, and •Jannes Schmitz1 for the Belle II collaboration — 1University of Bonn, Germany — 2University of Mainz, Germany — 3HLL of Max-Planck-Society Munich, Germany
The Belle II detector started recording physics collision data in spring 2019 with its full tracking detectors installed. During this years campaign, unexpected irradiation burst events were observed, which exposed the inner detectors and especially the PXD (PiXel Detector) to unwanted levels of prompt irradiation. A dedicated measurement campaign with spare PXD modules was carried out at the Mainz Microtron or brief MAMI, which aimed to reproduce the observed effects of irradiation burst events on the PXD in Belle II. To this end, a focused high intensity (800 nA) pencil beam of 855 MeV electrons was used to irradiate a full system demonstrator in several spatially confined fiducial regions. In this talk, the results of this campaigns will be presented and compared to the observed impact on the PXD modules installed inside Belle II.