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The energy resolution of a γ-ray detector describes its ability to separate radioactive nuclides with nearly identical energy. Several constants like crystal quality and preamplifier noise as well as a couple of variables influence this crucial figure. Usually a trade-off between charge loss and bias voltage induced noise has to be made in planar devices, while more complex electrode structures like...
We investigate the charge collection efficiency of specially designed charge multiplication silicon strip detectors produced by MICRON in Liverpool under the framework of the CERN RD50 collaboration. Charge collection measurements are performed before and after proton and neutron irradiation to fluences of 1×1015 and 5×1015 1 MeV neq/cm2. Charge multiplication structures on these devices include varying...
We report on the electrical and functional characterization of 3D Double-side, Double-Type-Column (3D-DDTC) detectors fabricated on p-type substrates. Results relevant to detectors in the diode, strip and pixel configurations are presented, and demonstrate a clear improvement in the charge collection performance compared to the first prototypes of these detectors.
Three-dimensional (3D) photodiode detectors offer advantages over standard planar photodiodes as more radiation hard sensors. 3D detectors with the double-sided geometry have been fabricated as very short strip detectors with the same inter-column spacing as proposed for the ATLAS pixel detector upgrade. The detectors have been irradiated to a fluence of 2 ?? 1016 cm-2 1 MeV equivalent neutrons, which...
The luminosity upgrade of the Large Hadron Collider (LHC), the sLHC, will constitute an extremely challenging radiation environment for tracking detectors. With respect to the LHC, massive improvements in radiation hardness are required. In this paper we investigate the superior radiation hardness of the 3D-design, where rows of 3D-columns are etched in substrate material and joined together to form...
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