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An 8-channel front-end ASIC has been designed in 0.35 micron CMOS technology for the upgrade of the LHCb RICH detectors at CERN. The chip allows fast single-photon counting up to 40 MHz, with a peaking time of 5 ns and a power consumption of about 1 mW per channel. Results of the characterisation of the first version of the chip are presented, including measurements in the lab with a dedicated test...
In this paper we present a study of the neutrons-induced damage in Silicon Photo-Multipliers. Twenti-six devices, produced by AdvanSiD, Hamamatsu and SensL, have been irradiated at the Geel Electron LINear Accelerator (GELINA) in Belgium on a nearly white neutron beam. The total 1 MeV equivalent integrated dose was 6.2×109neq/cm2. Photodetector performances have been measured during the whole irradiation...
The CLARO-CMOS is a prototype ASIC primarily designed for single-photon counting with multi-anode photomultipliers (Ma-PMTs), that found applications also in the read-out of silicon photomultipliers (SiPMs) and microchannel plates (MCPPMTs). The chip allows fast photon counting up to 40 MHz, with a power consumption of less than 1 mW per channel. The prototype is realised in a 0.35 micron CMOS technology...
We report radiation hardness tests performed, with a white neutron beam, at the Geel Electron LINear Accelerator in Belgium on silicon Photo-Multipliers. These are semiconductor photon detectors made of a square matrix of Geiger-Mode Avalanche photo-diodes on a silicon substrate. Several samples from different manufacturers have been irradiated integrating up to about 6.2 × 109 1-MeV-equivalent neutrons...
The superB project foresees the construction of a high intensity super-flavor factory at the Cabibbo Lab, in Tor Vergata (near Rome). The experiment, based on a high intensity asymmetric electron-positron collider, and on the related detector, is expected to reach a very high luminosity: 2 × 1036cm−2s−1, that will allow the high statistic study of rare decays and, possibly, will show evidences of...
The existing muon detectors for high-energy physics experiments are mainly made of gas chambers such as Resistive Plate Chambers, Limited Streamer Tubes or Multi Wire Proportional Chambers. With the increasing luminosity of the new accelerators and the increment in dimensions of the experiments the development of a new detection technique, which is robust, cheap and capable to sustain high particle...
The SuperB experiment needs large samples of Monte-Carlo simulated events in order to finalize the detector design and to estimate the data analysis performances. This work describes the system we developed to manage the production of the required simulated events in a fully distributed environment. The distributed infrastructure includes several sites in Europe and North America and is based on Grid...
We present the technology proposed for the super B muon system. The detector is based on MINOS style extruded scintillator coupled to wavelength shifting fibers. The light readout is done by means of Silicon Photomultiplier devices. We report our R&D results about charge spectra and time resolution for different readout configuration; setup optimization and experimental issues are also discussed...
High Energy Physics experiments need a huge amount of Monte Carlo Simulated events. Currently, Grid computing infrastructures are widely used for the distributed execution of this kind of CPU consuming jobs. To locate and retrieve files spread over the grid, an efficient tool to query and discover information about their content (metadata) is needed. AMGA is a Metadata Catalog Service, which is part...
SuperB is an international enterprise aiming at the construction of a very high luminosity asymmetric e+e- flavor factory. SuperB will be a partner, together with the LHC and eventually the ILC, in searching for new physics. Since the first steps of detector design, the load of computing issues in terms of Monte Carlo algorithm execution requires the exploitation of resources in a full distributed...
Tracing resource usage by Grid users is of utmost importance especially in the context of large-scale scientific collaborations such as within the High Energy Physics (HEP) community to guarantee fairness of resource sharing, but many difficulties can arise when tracing the resource usage of distributed applications over heterogeneous Grid platforms. These difficulties are often related to a lack...
A key feature of grid environment is the sharing of computing and storage: users operate on resources not directly owned by them. Often users working on the same research project are grouped in a virtual organization (VO) to use a common authorization policy on this resources. Many international experiments, however, use different Grid middleware platforms with their own authorization framework. This...
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