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In the frame of the INFN experiment REDSOX/REDSOX2 and in collaboration with Fondazione Bruno Kessler (FBK), Trento, we are developing trapezoidal-shaped monolithic arrays of Silicon Drift Detector (SDD) cells for low energy X-ray fluorescence (XRF) experiments. The shape of the individual SDD cell must be carefully selected in order to find the optimal compromise between spectroscopic performance...
This work is focused on Metal-Oxide-Semiconductor (MOS) injector devices for the calibration of the semiconductor detectors' response by means of the point injection of electron charge. The amount of injected charge depends on several parameters such as pulse amplitude, width and repetition rate, injector DC bias voltage and geometrical properties. We present a multi-parameter experimental study aimed...
Owing to the fully 3D topology of Multi-Linear Silicon Drift Detectors (MLSDD) and since the longitudinal coordinate is measured from the electron drift time, an accurate calibration of the relationship drift time vs. drift coordinate is needed and the dependence of the time-resolution and longitudinal position-resolution on the ionization profile has to be evaluated. In this work we performed a detailed...
Multi-Linear Silicon Drift Detectors (ML-SDDs) are a recent evolution of silicon drift detectors for position sensing and low-noise spectroscopy. The multi-linear transport mechanism based on electrons drift accounts for a relevant reduction in the number of channels required for true 2D position sensing and on chip JFETs allows the full exploitation of the small anode capacitance (<100 fF) in...
In this work we present the experimental qualification of the longitudinal profile of the charge cloud in Multi-Linear Silicon Drift Detectors at high charge levels. This is accomplished by means of a custom-developed deconvolution algorithm, based on the conjugate gradient method that extracts the actual shape of the anode current by deconvolution of the output waveforms of the frontend preamplifier...
We exploited the possibility of using a pulsed mono-energetic proton beam - coming from the DEFEL beam-line of the Tandetron accelerator at LaBEC (Laboratorio di Tecniche Nucleari per i Beni Culturali) in Sesto Fiorentino, Italy - as a diagnostic tool for the characterization of the response of semiconductor detectors at high charge densities. In fact accelerated protons owing to their limited range...
Compton imaging is of interest in the fields of astrophysics, homeland security and nuclear medicine as it can provide high spatial resolution and detection efficiency even at high γ-ray energies. In this work, carried out under the auspices of a project of the Italian Space Agency, aimed to explore novel technologies for Compton architectures with high-efficiency and low background for the detection...
Multi-Linear Silicon Drift Detectors (ML-SDDs) are a recent evolution of silicon drift detectors, in which the signal electrons generated by the interaction are confined within parallel drifting columns and transported towards point-like anodes by the electrostatic field. ML-SDDs can be operated both in integrate-readout and in free-running mode and are able to provide 2-D position sensing capability...
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