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Conventional x-ray detectors integrate the photon energy flux, losing individual photon energy information. By contrast, energy resolved photon-counting x-ray detectors (PCXDs) count photons in energy windows, thus retaining some energy information. This provides a number of advantages, including the use of energy information to aid in material discrimination. However, this capability relies on accurately...
A gamma camera, assembled from radiation imaging modules based on cadmium zinc telluride (CZT), has been studied under moderate and long-term variations of temperature (15degC to 40degC) and humidity (10% to 70%). Over one year we acquired energy spectra from radiation sources and we measured the photo-peak position and energy resolution. We observe that the camera remains within the desired performance...
We present a software suite, MeaBench, for data acquisition and online analysis of multi-electrode recordings, especially from micro-electrode arrays. Besides controlling data acquisition hardware, MeaBench includes algorithms for real-time stimulation artifact suppression and spike detection, as well as programs for online display of voltage traces from 60 electrodes and continuously updated spike...
Up to now conventional aluminum sputtering is a standard method for metallization in VLSI processes. With decreasing contact hole sizes down to the 0.5 μm range and aspect ratios ≫ 1, sputtering becomes more and more critical due to step coverage and reliability problems. A promising technique for future metallization processes is the contact hole filling by selective tungsten deposition. This metallization...
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