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A readout channel for applications to X-ray diffraction imaging at free electron lasers has been developed in a 65nm CMOS technology. The analog front-end circuit can achieve an input dynamic range of 100dB by leveraging a novel signal compression technique based on the non-linear features of MOS capacitors. Trapezoidal shaping is accomplished through a transconductor and a switched capacitor circuit,...
This work presents the characterization results of the first prototype of a readout channel for silicon pixel detectors, developed by the PixFEL collaboration in view of future X-ray Free Electron Laser (FEL) applications. The circuit, fabricated in a 65 nm CMOS technology by TSMC, has been designed to deal with a maximum input signal of 104 photons with energy from 1 keV to 10 keV, by exploiting...
The PixFEL project is conceived as the first stage of a long term research program aiming at the development of advanced instrumentation for coherent X-ray diffractive imaging applications at the next generation free electron laser (FEL) facilities. The project aims at substantially advancing the state-of-the-art in the field of 2D X-ray imaging through the adoption of cutting-edge microelectronic...
We consider the problem of detecting the presence of pneumoconiosis in a patient on the basis of evidence found in chest radiographs. Abnormalities pertaining to pneumoconiosis appear in the form of opacities of various sizes; the profusion of these opacities determines the stage of the disease. We present a multiresolution approach whereby we segment regions of interest (ROIs) from the X-Ray image...
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