The ATLAS Detector is one of the four big particle physics experiments at CERN’s LHC. Its innermost tracking system consisted of the 3-Layer silicon Pixel Detector (~80M readout channels) in the first run (2010-2012). Over the past two years it was refurbished and equipped with new services as well as a new beam monitor. The major upgrade, however, was the Insertable B-Layer (IBL). It adds ~12M readout channels for improved vertexing, tracking robustness and b-tagging performance for the upcoming runs, before the high luminosity upgrade of the LHC will take place. This thesis covers two main aspects of Pixel detector performance studies: The main work was the planning, commissioning and operation of a test bench that meets the requirements of current pixel detector components. Each newly built ATLAS IBL stave was thoroughly tested, following a specifically developed procedure, and initially calibrated in that setup. A variety of production accompanying measurements as well as preliminary results after integration into the ATLAS Pixel Detector, right before the start of the second LHC run, will be presented and discussed. The second focus of this thesis are pixel detector studies with the help of high energetic particle beams. A 3D prototype sensor from the ATLAS IBL production was studied at various rotation angles to investigate its charge collection properties. During these measurements, tracking information was provided by the Timepix telescope. Preliminary results depicting the detectors performance at various particle incidence angles will be evaluated.
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