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FARCOS (Femtoscope ARray for Correlation and Spectroscopy) is a novel modular detection system featuring high angular and energy resolution. It aims at reconstructing the particle's momentum at high precision and performing correlation measurements of LCPs and of LCPs and IMFs. The final system will be composed of 20 telescopes and the first prototypes will be ready to take data starting from 2017...
In the framework of the development of the FARCOS (Femtoscopy Array for Correlation and Spectroscopy) telescopes, we developed a CMOS frontend in C35B4C3 AMS technology for the readout of the photodiode current in CsI(Tl)-based calorimeters. The preamplifier features a continuous-reset feedback and an input PMOS transistor. The designed input dynamic range is 90 MeV Silicon equivalent. The compensation...
Radiation detectors built in high-voltage and high-resistivity CMOS technology are an interesting option for the large area pixel trackers sought for the upgrade of the Large Hadron Collider experiments. A possible architecture is a hybrid design, where CMOS sensors are readout by front-end electronics coupled through a thin dielectric layer. A critical requirement is the radiation hardness of both...
In this work we compare different calibration sources and focus on their combination to optimize the calibration of large-format X-ray imagers over a wide range. This activity is carried out in the framework of the DSSC project and the primary aim is the calibration of the DSSC camera. We considered pulsed IR laser, radioactive sources, X-ray tube, electrical injection devices, X-ray synchrotron beam,...
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...
FARCOS (Femtoscope ARray for Correlation and Spectroscopy) frontend has to feature a dynamic range up to half GeV with 4 different selectable gain values and an energy resolution of the order of 10 keV FWHM. 16-channel charge preamplifiers are integrated in a single chip in AMS 0.35μm C35B4C3 technology. In order to experimentally probe the achievable dynamic range, we exploited the pulsed monoenergetic...
In order to fulfil the need of cheap and high-resolution radiation beam monitors we exploited the possibility of using commercial CMOS image sensors as X-rays and low-intensity particle beam monitors. CMOS sensors nowadays offer a wide range of resolutions with excellent spectral and chromatic responses as well as generally low cost. We have now selected a novel CMOS sensor that is provided in a naked...
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...
. We are developing a multi-channel double-polarity selectable-gain frontend to be coupled to the Double-Sided Silicon Strip Detectors (DSSSD) of a novel versatile and modular Femtoscope ARray for Correlation and Spectroscopy, named FARCOS, featuring high angular and energy resolution and able to address several open cases in nuclear physics (nuclear dynamics and asy-EOS). The key feature of FARCOS,...
In the framework of the construction of a novel Femtoscope Array for Correlation and Spectroscopy, named FARCOS, aiming at the identification in charge and mass even of particles stopping in the first detection layer, we are performing a thorough characterization of the silicon detector layers in terms of the collection properties as a function of the point of incidence. We have experimental evidence...
We successfully evaluated the possibility of using a pulsed monoenergetic proton beam as a diagnostic tool for semiconductor detectors' response mapping at high charge densities. In order to ease the setup of the detector under test we explored the opportunity of performing tests with protons in air. We qualified a polyimide film window (Upilex-S, 7.5 μm nominal thickness) as proton extraction window...
A highly segmented Double-Sided Silicon Strip Detector has been characterized using mono-energetic pulsed beams of protons (1 and 3 MeV) and carbon (13 MeV). The detector was manufactured from a Neutron Transmutation Doped (NTD) silicon wafer yielding a bulk resistivity of 2.3 kOhm cm. In this work we show the interstrip effects caused by the beam striking only one strip and the beam on both the strip...
In order to fulfil the need of cheap and high-resolution systems as radiation beam monitors we exploited the possibility of using commercial CMOS image sensors as X-rays and low-intensity particle beam monitors. The low cost of CMOS sensors make it possible to neglect the issue of radiation damage and consider the sensor somehow to be disposable after a given time. In perspective, the ability to combine...
Aim of this work is the design and simulation of a selectable-gain charge preamplifier to be coupled to the Double-Sided Silicon Strip Detectors of the Femtoscope ARray for Correlation and Spectroscopy, named FARCOS. FARCOS features high angular and energy resolution and able to serve in several nuclear physics experiments both with stable and with radioactive beams thanks to its versatility and modularity...
Silicon microstrips are widely used in nuclear physics experiments when high granularity and high resolution of the detection system is required, as, for example in particle-particle correlation measurements. In addition microstrip detectors are used in the field of X-ray detection for position resolved X-ray spectroscopy. In order to surgically probe the response of the interstrip region we tested...
We exploited the possibility of using a pulsed mono-energetic proton beam (DEFEL beam-line @ LABEC, Italy) able to provide bunches of protons with tunable energies for detector qualification, diagnostics and calibration. This allows qualification of the response of the detector-front end system over a wide range of calibrated charge levels, with high precision in space and time, reaching the highest...
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...
We are currently developing a novel detection system, named FARCOS (Femtoscope Array for Correlation and Spectroscopy) and featuring high angular and energy resolution and able to reconstruct particle's momentum at high precision for different physical cases in multi-fragmentation nuclear physics experiments. Performing a Pulse Shape Analysis on signals coming from the ΔE stages -Double Sided Silicon...
We developed a simulation code for electron-hole transport and signal formation in semiconductor detectors having 2D geometry, either in linear or cylindrical coordinates. Thermal diffusion and Coulomb interaction between the carriers - essential for the correct simulation of high-density ionization tracks - have been included preserving their full 3D nature. In this way we can solve transport problems...
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