000003258 001__ 3258
000003258 005__ 20220929082540.0
000003258 037__ $$aBELLE2-MTHESIS-2022-037
000003258 041__ $$aeng
000003258 100__ $$aJannes Schmitz
000003258 245__ $$aIrradiation Burst Studies on Belle II PXD Module Components
000003258 260__ $$aBonn$$bPhysikalisches Institut$$c2020
000003258 300__ $$amult. p
000003258 500__ $$aPresented on 17 12 2020
000003258 502__ $$aMSc$$bBonn, University of Bonn$$c2020
000003258 520__ $$aThe Belle II detector started recording collision data in spring 2019. During physics runs, unexpected irradiation burst events occurred, which exposed the inner detectors and especially the PXD (PiXel Detector) to unwanted levels of prompt irradiation. Dedicated measurement campaigns were carried out at the Mainz Microtron (MAMI), which aimed to reproduce the observed effects of irradiation bursts on the PXD in Belle II. To this end, a focused high intensity (up to 10uA) pencil beam of 855 MeV electrons was used to irradiate full system demonstrators in several spatially confined fiducial regions. During first campaigns in 2020 the observed failure mode could be reproduced and restricted to vulnerable regions in one specific module component. This thesis summarizes the results of all performed measurement campaigns, concluding on possible protective measures against the impact of irradiation bursts on the PXD modules installed inside Belle II.
000003258 700__ $$aProf.Dr.Jochen Dingfelder$$edir.
000003258 8560_ $$fjannes.schmitz@uni-bonn.de
000003258 8564_ $$uhttps://docs.belle2.org/record/3258/files/BELLE2-MTHESIS-2022-037.pdf
000003258 980__ $$aTHESIS