The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The space radiation induced displacement damage effects on the performance of the Silicon Drift Detector (SDD) based X-ray spectrometer has been studied using X-ray (Fe-55) and gamma ray (Co-60) radiations. The spectroscopic performance of the SDD based spectrometer degrades due to radiation damage during the transit and in-orbit operations. Silicon detectors are sensitive to displacement damage which...
FASPAX (Fermi-Argonne Semiconducting Pixel Array X-ray detector) is being developed as a fast integrating area detector with wide dynamic range for time resolved applications at the upgraded Advanced Photon Source (APS.) A burst mode detector with intended 13 MHz image rate, FASPAX will also incorporate a novel integration circuit to achieve wide dynamic range, from single photon sensitivity to 10...
The main goal of the AEgIS experiments is to measure the gravitational force for anti-hydrogen, testing Einstein's weak equivalence principle, which states that all bodies falls with the same acceleration, independently from their mass and composition. The measurement will be done using an anti-hydrogen beam sent trough a classical moire deflectometer. To measure the deflection of the beam from a...
We have developed silicon (Si) strip photon counting detectors for modalities used in clinical breast imaging including mammography, tomosynthesis, computed tomography, and lump imaging in the operating room. Typically, x-ray integrating detectors based on scintillating cesium iodide CsI(Tl) or amorphous selenium (a-Se) are used in most commercial systems. Recently, mammography instrumentation has...
In this work we propose the application of a radiation damage model based on the introduction of deep level traps/recombination centers suitable for device level numerical simulation of radiation detectors at very high fluences (e.g. 1÷2×1016 1-MeV equivalent neutrons per square centimeter) combined with a surface damage model developed by using experimental parameters extracted from measurements...
The implementation of fully differential readout method for Silicon Photomultipliers (SiPM) is presented. The front-end circuit consists of preamplifier with fast shaper and Charge to Time Converter (QTC). The fast shaper generates unipolar pulse. The peaking time for single photoelectron is equal to 3.6ns and the FWHM is 3.8ns. The pulse width of the QTC depends on the number of photons. The gain...
The CMS experiment intends to exchange the pixel detector for the high luminosity phase of the Large Hadron Collider (HL-LHC). Therefore, a large R&D effort has been started in order to develop sensors capable of withstanding the expected extremely high radiation damage. The targeted integrated luminosity of 3000 fb−1, estimated for 10 years of operation at the design center-of-mass energy of...
The operation of the present pixel detector has started in 2010 with LHC operating at a center of mass (CM) energy of 7 TeV. At the beginning of 2012 CM energy was increased to 8 TeV and within December 2012 a total of 19 fb−1 integrated luminosity has been delivered, with instantaneous peak luminosities approaching 7 × 1033 cm−2s−1. The present pixel detector was originally designed for a luminosity...
In view of the LHC upgrade phases towards the High Luminosity LHC (HL-LHC), the ATLAS experiment plans to upgrade the Inner Detector with an all-silicon system. The n-on-p silicon technology is a promising candidate to achieve a large area instrumented with pixel sensors, since it is radiation hard and cost effective. The paper reports on the performance of novel n-on-p edgeless planar pixel sensors...
Microstructured semiconductor neutron detectors (MSNDs) represent a low-cost, high-efficiency means of solid-state thermal neutron detection. Trenches are etched into a pn-junction diode and backfilled with nano-sized 6LiF neutron converting material. Neutrons absorbed within the conversion material produce charged particle reaction products that interact within the semiconductor substrate and generate...
We report on the design of a real-time tracking system using precise space and time information of the hit. Tracking detectors with about 150 ps time resolution are already available and intense R&D is in progress to improve the performance. We describe the implementation of a real-time tracking algorithm in commercial FPGAs for a prototype tracking system based on 8 planes of silicon sensors...
Microstructured semiconductor neutron detectors (MSNDs) represent a compact, low-cost, high-efficiency means of solid-state thermal neutron detection. Trenches are etched into a 1-cm2 or 4-cm2 active area pn-junction diode and backfilled with 6LiF neutron converting material. Charged-particle reaction products produced from neutron capture within the conversion material can be measured to indicate...
A 128-channel event-driven ASIC is described which reads out the R3B (Reactions with Relativistic Radioactive Beams) silicon micro vertex tracker. Ionizing particles with energies in the range of 40keV-50MeV are detected, digitized and read out with 12 bit resolution, and time stamped with up to 5ns precision. The ASIC copes with signal charges and detector leakage currents of both polarities and...
In the past few years, several interesting developments in microstructured solid-state thermal neutron detectors have been pursued. These devices feature high aspect-ratio cavities, lled with neutron converter materials, so as to improve the neutron detection efciency with respect to coated planar sensors. In the framework of the INFN HYDE (HYbrid Detectors for neutrons) project, we have designed...
A network of 16 Medipix-2 (MPX) silicon pixel devices was installed in the ATLAS detector cavern at CERN. It was designed to measure the composition and spectral characteristics of the radiation field in the ATLAS experiment and its surroundings. This study demonstrates that the MPX network can also be used as a self-sufficient luminosity monitoring system. The MPX detectors collect data independently...
Radiation-hard detectors are needed for the High-Luminosity upgrade for the ATLAS experiment at the Large Hadron Collider at CERN. 3D silicon devices are a technology which may be able to provide the required resolution and durability when exposed to ionising radiation. 3D sensors have electrodes processed inside the silicon bulk rather than being implanted on its surface. This paper will present...
Among the new emerging cancer therapies, Microbeam Radiation Therapy (MRT) is currently showing very promising results in terms of limiting or decreasing tumor growth while keeping the damage to healthy tissue to a minimum. The MRT is able to deliver unprecedented dose rates of up to 20 kGy/s, posing important questions in terms of treatment planning and patient safety during treatment. For this reason,...
Our group has designed a family of ASICs dedicated to the readout of semiconductor detectors for space applications, named IDeF-X standing for Imaging Detector Front-end [1]-[3]. IDeF-X BD is a new member of the family. It has been optimized for the readout of low capacitor and low leakage current Silicon or Cd(Zn)Te detectors. IDeF-X BD has been designed in the standard AMS CMOS 0.35 μm process technology...
. 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,...
Multiple time-to-digital converters coupled with silicon photomultipliers allow to timestamp several light photons generated by a scintillation event. Multichannel digital silicon photomultipliers opened the possibility to estimate a gamma-photon time mark by using several photoelectrons timestamps. We studied the already-existing statistics models of pho-toeletron time-stamping generation, while...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.