Development and characterization of diamond and 3D-silicon pixel detectors with ATLAS-pixel readout electronics [Elektronische Ressource] / von Markus Mathes. Universität Bonn, Physikalisches Institut

..UNIVERSITAT BONNPhysikalisches InstitutDevelopment and Characterization ofDiamond and 3D-Silicon Pixel Detectorswith ATLAS-Pixel Readout ElectronicsvonMarkus MathesAbstract: Hybrid pixel detectors are used for particle tracking in the inner-mostlayersofcurrenthighenergyexperimentslikeATLAS.Aftertheproposedluminosity upgrade of the LHC, they will have to survive very high radiation16 2fluences of up to 10 particles per cm per life time. New sensor concepts andmaterials are required, which promise to be more radiation tolerant than thecurrently used planar silicon sensors. Most prominent candidates are so-called3D-silicon and single crystal or poly-crystalline diamond sensors. Using theATLASpixelelectronicsdifferentdetectorprototypeswithapixelgeometryof2400×50μm have been built. In particular three devices have been studied indetail: a 3D-silicon and a single crystal diamond detector with an active area2of about 1cm and a poly-crystalline diamond detector of the same size as a2currentATLASpixeldetectormodule(2×6cm ). Tocharacterizethedevicesregarding their particle detection efficiency and spatial resolution, the chargecollection inside a pixel cell as well as the charge sharing between adjacentpixels was studied using a high energy particle beam.Post address: BONN-IR-2008-15Nussallee 12 Bonn University53115 Bonn December 2008Germany ISSN-0172-8741..