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[en] The project consists to program a FPGA board which will replace the MCA and therefore we chose to create a VHDL program whose role is to provide a peak detect the digital signal from the acquisition chain. This program is composed of several parts to be programmed, the program part for the counter, for LCD, for ADC and another part for the state machine. And it will download the following program in the FPGA in order to get the final result of the downloading in a wide as a counter.
[en] After a short description of the design and the mode of operation of the silicon diode matrix arrays, possibilities of the two-dimensional detection of ionizing radiation by means of these targets is examined. The interactions between ionizing radiation (α-, β-, γ-radiation) and silicon targets is discussed and the limits of detection is estimated. Finally the detection of neutrons by means of converter sheets is shown. By the example of the detection of α-particles from 241Am it is shown that the α-particles which entered the target, can be seen as separate light spots. (author)
[en] Bruno Pontecorvo has given many important contributions to particle physics, two of which were closely related to my work at the beginning of my career. I will discuss them here and I will also describe my first meeting with Bruno in 1973, on the occasion of a visit to Dubna.
[en] Is intended for registration of alpha radiation (plutonium 239, 5.15 MeV, flux density is 1-30000 sm-2* min-1), beta radiation (energy range is 0.05-3.0 MeV, flux density is 1-100000 sm-2* min-1), gamma radiation (energy range is 0.05-1.5 MeV, equivalent doze rate is 0.0001-100 mSv/h), neutrons (thermal - fast, flux density is 1-30000 sm-2* min-1) and x-ray radiation (energy range is 6-150 keV, equivalent doze rate is 0.0001-0.1 mSv/h)
[en] In recent years the astro-particle community is involved in the realization of experimental apparatuses for the detection of high-energy neutrinos originated in cosmic sources or produced in the interaction of Cosmic Rays with the Cosmic Microwave Background. For neutrino energies in the TeV-PeV range, the optical Cherenkov technique is considered optimal. Water (or Ice)-Cherenkov technique is based on the detection of the charged leptons generated in the neutrino charged current weak interactions with the medium surrounding the detector. Those detectors measure the visible Cherenkov photons originated by charged particles propagating at velocities greater than the speed of light through a transparent medium and consist of array of photomultipliers. The charged-particle track can be reconstructed measuring the time of arrival of the Cherenkov photons on the photomultipliers. An overview of the current status of those experiments will be given.
[en] The ICARUS T600 detector is the largest Liquid Argon (LAr) Time Projection Chamber (TPC) ever built and operated to date. The detector, assembled underground in the Hall B of the Gran Sasso Laboratory (LNGS), has been collecting neutrino events with the CERN to Gran Sasso (CNGS) beam and from cosmic rays from May 2010 to June 2013. The ICARUS excellent spatial and calorimetric resolution, coupled to very refined 3D event reconstruction techniques, allows to search, among others, for νμ→νe transitions which may be related to the 'LSND anomaly'. Though no evidence of this is detected, an important region of the parameter space remains unexplored. For this reason the joint ICARUS-NESSiE collaboration is proposing an experiment, at the new foreseen CERN-SPS neutrino beam facility (CENF), to solve the sterile neutrino puzzle.
[en] A nuclear detector is described comprising a cadmium tellurium (CdTe) crystal of high resistivity and sensitive to α, β, γ rays and to thermal neutrons. Electrodes are fitted to each parallel face of the crystal. An elastic contact element rests between the first electrode and a conducting flange resting through an insulating flange on a conducting base supporting the detector. A coaxial connector is fitted in the base with a central pole connected to the conducting flange. Insulators secure and centre the crystal in a conducting materials belonging to the silicon, copper, gold, platinum, palladium group and their alloys
[fr]On presente un detecteur nucleaire. Il comporte: un cristal de tellurure de cadmium (CdTe) de haute resistivite et sensible aux rayonnements α, β, γ ainsi qu'aux neutrons thermiques. Des electrodes sont disposees sur chacune des faces paralleles du cristal. Un element elastique de contact est appuye entre la premiere des electrodes et un flasque conducteur qui s'appuie par l'intermediaire d'une joue isolante sur un socle conducteur servant de support au detecteur. Un connecteur coaxial est monte dans le socle avec un pole central relie au flasque conducteur. Des moyens isolants maintiennent et centrent le cristal dans un boitier conducteur qui s'adapte sur le socle. Les electrodes sont en materiaux conducteurs appartenant au groupe du silicium, du cuivre, de l'or, du platine, du palladium et a leurs alliages