Mainz 2014 – scientific programme

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T: Fachverband Teilchenphysik

T 64: Halbleiter 4

T 64.8: Talk

Tuesday, March 25, 2014, 18:30–18:45, P109a

3-dimensional Charge Collection Efficiency (3DCCE) Measurement of ATLAS-IBL and HL-LHC Tracking Detector Sensor Candidates — •Jennifer Jentzsch — CERN, Switzerland/TU Dortmund, Germany

Measurements of spatial charge collection efficiency (CCE) of irradiated and un-irradiated vertex detectors are used to characterize their radiation resistance. The 2-dimensional CCE is a standard measurement to study inefficiency regions and design impacts of different sensor designs. New sensor materials, like polycrystalline Chemical Vapor Deposition (pCVD) diamond, and new sensors layouts, like 3D patterned silicon, are candidates to provide radiation resistances needed for challenging particle fluxes in the next generation of high luminosity collider experiments. Measuring their 3-dimensional CCE with a tomography method, can provide an excellent tool to study local inefficiencies, spatial trapping effects and design impacts of these sensors. It can also allow to verify (e.g. for planar sensors) existing 3D electric field simulations. A method for 3D CCE measurement with high energetic particle beams using radial scans and 3D volumetric reconstruction methods is described. Simulation studies and first results of measurements from testbeam experiments at CERN will be shown.