21 research outputs found

    Mu2e Crystal Calorimeter Readout Electronics: Design and Characterisation

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    The Mu2e experiment at Fermi National Accelerator Laboratory will search for the charged-lepton flavour-violating neutrinoless conversion of negative muons into electrons in the Coulomb field of an Al nucleus. The conversion electron with a monoenergetic 104.967 MeV signature will be identified by a complementary measurement carried out by a high-resolution tracker and an electromagnetic calorimeter, improving by four orders of magnitude the current single-event sensitivity. The calorimeter—composed of 1348 pure CsI crystals arranged in two annular disks—has a high granularity, 10% energy resolution and 500 ps timing resolution for 100 MeV electrons. The readout, based on large-area UV-extended SiPMs, features a fully custom readout chain, from the analogue front-end electronics to the digitisation boards. The readout electronics design was validated for operation in vacuum and under magnetic fields. An extensive radiation hardness certification campaign certified the FEE design for doses up to 100 krad and 1012 n1MeVeq/cm2 and for single-event effects. A final vertical slice test on the final readout chain was carried out with cosmic rays on a large-scale calorimeter prototype

    Slow control and data acquisition development in the Mu2e experiment

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    The muon campus program at Fermilab includes the Mu2e experiment that will search for a charged-lepton flavor violating processes where a negative muon converts into an electron in the field of an aluminum nucleus, improving by four orders of magnitude the search sensitivity reached so far. Mu2e’s Trigger and Data Acquisition System (TDAQ) uses {it otsdaq} solution. Developed at Fermilab, {it otsdaq} uses the {it artdaq} DAQ framework and {it art} analysis framework, for event transfer, filtering, and processing. {it otsdaq} is an online DAQ software suite with a focus on flexibility and scalability, and provides a multi-user interface accessible through a web browser. A Detector Control System (DCS) for monitoring, controlling, alarming, and archiving has been developed using the Experimental Physics and Industrial Control System (EPICS) open source Platform. The DCS System has also been integrated into {it otsdaq}, providing a GUI multi-user, web-based control, and monitoring dashboard

    Il patrimonio delle raccolte cetologiche minori della Puglia

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    Viene fornito il catalogo dei Cetacei conservati in otto musei naturalistici e collezioni scientifiche minori della Puglia. In totale sono stati censiti 26 reperti appartenenti a nove specie della fauna mediterranea. Particolarmente interessanti sono due crani di Ziphius cavirostris, con provenienza dalle coste pugliesi, e tre reperti di Delphinus delphis antecedenti la metĂ  del secolo scorso con probabile provenienza dai mari locali.This study deals with the catalogue of Cetacean specimens kept at eight museums and scientific collections of Apulia Region. A thorough bibliographic and archivistic research was performed to reconstruct the history of the Cetacean collection in each Museum. Specimens kept were subjected to a revision of the species determination. On the whole, 26 specimens were registered belonging to nine species of the Mediterranean fauna. Particular interesting are the two skulls of Ziphius cavirostris, with origin from the Apulian coast, and three specimens of Delphinus delphis before the middle of last century with probable origin from local waters