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Now showing items 1 - 16 of 134

  • The new Trigger/GPS module for the extreme energy events project

    Abbrescia, M.   Avanzini, C.   Baek, Y.   Ferroli, R. Baldini   Baldini, L.   Batignani, G.   Battaglieri, M.   Boi, S.   Bossini, E.   Carnesecchi, F.   Cicalo, C.   Cifarelli, L.   Coccetti, F.   Coccia, E.   Cocciolo, G.   Corvaglia, A.   Costantinia, A.   De Gruttola, D.   Viera, M. A. Del Rio   De Pasquale, S.   Fabbri, F.   Galante, L.   Galeotti, P.   Garbini, M.   Gemme, G.   Gnesi, I   Grazzi, S.   Hatzifotiadou, D.   La Rocca, P.   Liu, Z.   Mandaglio, G.   Maron, G.   Mazziotta, M. N.   Min, B.   Nania, R.   Noferini, F.   Nozzoli, F.   Palmonari, F.   Panareo, M.   Panetta, M. P.   Paoletti, R.   Park, W.   Pellegrino, C.   Perasso, L.   Pilo, F.   Piragino, G.   Pisano, S.   Riggi, F.   Righini, G.   Ripoli, C.   Rizzi, M.   Sartorelli, G.   Scapparone, E.   Schioppa, M.   Scribano, A.   Selvi, M.   Squarcia, S.   Taiuti, M.   Terreni, G.   Trifiro, A.   Trimarchi, M.   Vistoli, C.   Votano, L.   Williams, M. C. S.   Zichichi, A.   Zuyeuski, R.  

    The Extreme Energy Event (EEE) project is an experiment devoted to the study of high energy Extensive Air Showers (EAS) over a very large area, using an array of muon telescopes. At present the array is composed of more than 50 stations, most of them distributed across the Italian territory, on a total area of around 3 x 10(5) km(2). The telescopes are based on position-sensitive Multi-gap Resistive Plate Chambers (MRPCs) whose readout strips are connected to two TDC (Time-to-Digital Converter) units. Here a novel VME trigger unit for the EEE telescopes is presented, which also includes an embedded GPS receiver for precision timing applications. This new unit gets together, in the same electronic board, the functionalities of different parts of the electronics used up to now in the EEE experiment, and adds new ones, making the whole readout system simpler, more flexible and robust. Details about the trigger/GPS unit, including some measurements of its time resolution, are reported here.
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  • A low cost, high speed, multichannel analog to digital converter board

    Ameli, F.   Battaglieri, M.   Bondi, M.   Capodiferro, M.   Celentano, A.   Chiarusi, T.   Chiodi, G.   De Napoli, M.   Lunadei, R.   Marsicano, L.   Musico, P.   Pratolongo, F.   Recchia, L.   Ruggieri, D.   Stellato, L.  

    We developed a highly configurable digitizer board including 12 complete acquisition channels: the board analog to digital converters (ADC) components can be chosen to tailor the specific application, ranging from 12 bit 65 MHz up to 14 bit 250 MHz. In this application the front-end circuit is dedicated to the Silicon Photomultipliers (SiPM) of the BDX detector. The control is made by a commercial FPGA module to guarantee the scalability of the system. Having the possibility to choose the ADC and the "size" of the FPGA on the control module the price can be reduced to the minimum for a given application. The board permit the time synchronization using various methods including GPS and White Rabbit. The configurability of the board and the various options implemented permit to use it in a triggerless data acquisition system. Up to 240 channels can be hosted in a single 6U crate.
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  • First results from the upgrade of the Extreme Energy Events experiment

    Abbrescia, M.   Avanzini, C.   Baldini, L.   Ferroli, R. Baldini   Batignani, L. G.   Battaglieri, M.   Boi, S.   Bossini, E.   Carnesecchi, F.   Chiavassa, A.   Cicalo, C.   Cifarelli, L.   Coccetti, F.   Coccia, E.   Corvaglia, A.   De Gruttola, D.   De Pasquale, S.   Fabbri, L.   Frolov, V.   Galante, L.   Galeotti, P.   Garbini, M.   Gemme, G.   Gnesi, I.   Grazzi, S.   Gustavino, C.   Hatzifotiadou, D.   La Rocca, P.   Mandaglio, G.   Rodriguez, O. Maragoto   Maron, G.   Mazziotta, M. N.   Miozzi, S.   Nania, R.   Noferini, F.   Nozzoli, F.   Palmonari, F.   Panareo, M.   Panetta, M. P.   Paoletti, R.   Park, W.   Pellegrino, C.   Perasso, L.   Pilo, F.   Piragino, G.   Pisano, S.   Riggi, F.   Righini, G. C.   Ripoli, C.   Rizzi, M.   Sartorelli, G.   Scapparone, E.   Schioppa, M.   Scribano, A.   Selvi, M.   Serci, S.   Squarcia, S.   Taiuti, M.   Terreni, G.   Trifiro, A.   Trimarchi, M.   Vistoli, M. C.   Votano, L.   Williams, M. C. S.   Zheng, L.   Zichichi, A.   Zuyeuski, R.  

    The Extreme Energy Events (EEE) experiment is the largest system in the world completely implemented with Multigap Resistive Plate Chambers (MRPCs). Presently, it consists of a network of 59 muon telescopes, each made of 3 MRPCs, devoted to the study of secondary cosmic rays. Its stations, sometimes hundreds of kilometers apart, are synchronized at a few nanoseconds level via a clock signal delivered by the Global Positioning System. The data collected during centrally coordinated runs are sent to INFN CNAF, the largest center for scientific computing in Italy, where they are reconstructed and made available for analysis. Thanks to the on-line monitoring and data transmission, EEE operates as a single coordinated system spread over an area of about 3 x 10(5) km(2). In 2017, the EEE collaboration started an important upgrade program, aiming to extend the network with 20 additional stations, with the option to have more in the future. This implies the construction, testing and commissioning of 60 chambers, for a total detector surface of around 80 m(2). In this paper, aspects related to this challenging endeavor are covered, starting from the technological solutions chosen to build these state-of-the-art detectors, to the quality controls and the performance tests carried on.
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  • The new trigger/GPS module for the EEE project

    Panetta, M. P.   Abbrescia, M.   Avanzini, C.   Ferroli, R. Baldini   Baldini, L.   Batignani, G.   Battaglieri, M.   Boi, S.   Bossini, E.   Carnesecchi, F.   Chiavassa, A.   Cicalo, C.   Cifarelli, L.   Coccetti, F.   Coccia, E.   Corvaglia, A.   De Gruttola, D.   De Pasquale, S.   Fabbri, F.   Frolov, V   Galante, G.   Galeotti, P.   Garbini, M.   Gemme, G.   Gnesi, I   Grazzi, S.   Gustavino, C.   Hatzifotiadou, D.   La Rocca, P.   Mandaglio, G.   Rodriguez, O. Maragoto   Maron, G.   Mazziotta, M. N.   Miozzi, S.   Nania, R.   Noferini, F.   Nozzoli, F.   Palmonari, F.   Panareo, M.   Paoletti, R.   Park, W.   Pellegrino, C.   Perasso, L.   Pilo, F.   Piragino, G.   Pisano, S.   Riggi, F.   Righini, G.   Ripoli, C.   Rizzi, M.   Sartorelli, G.   Scapparone, E.   Schioppa, M.   Scribano, A.   Selvi, M.   Serci, S.   Squarcia, S.   Taiuti, M.   Terreni, G.   Trifiro, A.   Trimarchi, M.   Vistoli, C.   Votano, L.   Williams, M. C. S.   Zheng, L.   Zichichi, A.   Zuyeuski, R.  

    The Extreme Energy Events Project is an experiment devoted to the study of the Extensive Atmospheric Showers (EAS) which consists of a network of Multigap Resistive Plate Chambers (MRPCs) muon telescopes distributed over a very large area, similar to 3times10(5) km(2). It requires a precise time synchronization to correlate the information collected from each single detector. The data acquisition system of each telescope is equipped with a trigger unit and a GPS receiver to perform precision timing of events. The Global Positioning System (GPS) unit provides the one pulse per second signal (1PPS) which is used to create a timestamp in UTC time. A novel VME trigger unit for the EEE telescopes was developed, including an embedded GPS engine for timing application. The trigger/GPS unit is presented, including some preliminary measurements of its time resolution.
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  • Searching for a dark photon: project of the experiment at VEPP-3

    Wojtsekhowski, B.   Baranov, G. N.   Blinov, M. F.   Levichev, E. B.   Mishnev, S. I.   Nikolenko, D. M.   Rachek, I. A.   Shestakov, Yu. V.   Tikhonov, Yu. A.   Toporkov, D. K.   Alexander, J. P.   Battaglieri, M.   Celentano, A.   De Vita, R.   Marsicano, L.   Bondi, M.   De Napoli, M.   Italiano, A.   Leonora, E.   Randazzo, N.  

    We propose an experiment to search for a new gauge boson A' in e(+)e(-) annihilation by means of a positron beam incident on a gas hydrogen target internal to the bypass at the VEPP-3 storage ring. The search method is based on a missing mass spectrum in the reaction e(+) e(-) -> gamma A'. It allows observation of the A' signal independently of its decay modes and life time. The projected result of this experiment corresponds to an upper limit on the square of the coupling constant epsilon(2) =3D 3.10(-8) with a signal-to-noise ratio of two to one at an A' mass of 5-20 MeV.
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  • in the deep-inelastic regime with CLAS

    Zhao, B.   Kim, A.   Joo, K.   Bedlinskiy, I.   Kim, W.   Kubarovsky, V.   Ungaro, M.   Adhikari, S.   Akbar, Z.   Angelini, G.   Avakian, H.   Ball, J.   Baltzell, N.A.   Barion, L.   Bashkanov, M.   Battaglieri, M.   Batourine, V.   Biselli, A.S.   Boiarinov, S.   Briscoe, W.J.   Brooks, W.K.   Burkert, V.D.   Carman, D.S.   Celentano, A.   Chatagnon, P.   Chetry, T.   Ciullo, G.   Clark, L.   Clary, B.A.   Cole, P.L.   Contalbrigo, M.   Crede, V.   D'Angelo, A.   Dashyan, N.   De Vita, R.   De Sanctis, E.   Defurne, M.   Deur, A.   Diehl, S.   Djalali, C.   Dupre, R.   Egiyan, H.   Ehrhart, M.   El Alaoui, A.   El Fassi, L.   Eugenio, P.   Filippi, A.   Forest, T.A.   Gavalian, G.   Ghandilyan, Y.   Gilfoyle, G.P.   Girod, F.X.   Golovatch, E.   Gothe, R.W.   Griffioen, K.A.   Guidal, M.   Guo, L.   Hafidi, K.   Hakobyan, H.   Harrison, N.   Hattawy, M.   Heddle, D.   Hicks, K.   Holtrop, M.   Ilieva, Y.   Ireland, D.G.   Ishkhanov, B.S.   Isupov, E.L.   Jenkins, D.   Jo, H.S.   Johnston, S.   Kabir, M.L.   Keller, D.   Khachatryan, G.   Khachatryan, M.   Khandaker, M.   Klein, A.   Klein, F.J.   Kuhn, S.E.   Kuleshov, S.V.   Lanza, L.   Lenisa, P.   Livingston, K.   MacGregor, I.J.D.   Marchand, D.   Markov, N.   McKinnon, B.   Meyer, C.A.   Meziani, Z.E.   Mirazita, M.   Mokeev, V.   Montgomery, R.A.   Munoz Camacho, C.   Nadel-Turonski, P.   Niccolai, S.   Niculescu, G.   Osipenko, M.   Ostrovidov, A.I.   Paolone, M.   Paremuzyan, R.   Park, K.   Pogorelko, O.   Price, J.W.   Prok, Y.   Protopopescu, D.   Ripani, M.   Rizzo, A.   Rosner, G.   Rossi, P.   Sabatié, F.   Salgado, C.   Schumacher, R.A.   Sharabian, Y.G.   Skorodumina, Iu.   Smith, G.D.   Sokhan, D.   Sparveris, N.   Stepanyan, S.   Strakovsky, I.I.   Strauch, S.   Taiuti, M.   Tan, J.A.   Voskanyan, H.   Voutier, E.   Wang, R.   Wei, X.   Wood, M.H.   Zachariou, N.   Zhang, J.   Zhao, Z.W.  

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  • Modified structure of protons and neutrons in correlated pairs

    Schmookler, B.   Duer, M.   Schmidt, A.   Hen, O.   Gilad, S.   Piasetzky, E.   Strikman, M.   Weinstein, L. B.   Adhikari, S.   Amaryan, M.   Ashkenazi, A.   Avakian, H.   Ball, J.   Balossino, I.   Barion, L.   Bashkanov, M.   Battaglieri, M.   Beck, A.   Bedlinskiy, I.   Biselli, A. S.   Boiarinov, S.   Briscoe, W. J.   Brooks, W. K.   Burkert, V. D.   Carman, D. S.   Celentano, A.   Charles, G.   Chetry, T.   Ciullo, G.   Cohen, E.   Cole, P. L.   Crede, V.   Cruz-Torres, R.   D'Angelo, A.   Dashyan, N.   De Sanctis, E.   De Vita, R.   Deur, A.   Diehl, S.   Djalali, C.   Dupre, R.   Egiyan, H.   El Fassi, L.   Elouadrhiri, L.   Eugenio, P.   Fedotov, G.   Fersch, R.   Filippi, A.   Forest, T. A.   Gavalian, G.   Gilfoyle, G. P.   Girod, F. X.   Golovatch, E.   Gothe, R. W.   Griffioen, K. A.   Guidal, M.   Guo, L.   Hafidi, K.   Hakobyan, H.   Hanretty, C.   Harrison, N.   Hauenstein, F.   Hayward, T. B.   Hicks, K.   Higinbotham, D.   Holtrop, M.   Hyde, C. E.   Ilieva, Y.   Ireland, D. G.   Ishkhanov, B. S.   Isupov, E. L.   Jo, H. -S.   Johnston, S.   Joo, K.   Joosten, S.   Kabir, M. L.   Keller, D.   Khachatryan, G.   Khachatryan, M.   Khandaker, M.   Kim, A.   Kim, W.   Klein, A.   Klein, F. J.   Korover, I.   Kubarovsky, V.   Kuhn, S. E.   Kuleshov, S. V.   Lanza, L.   Laskaris, G.   Lenisa, P.   Livingston, K.   MacGregor, I. J. D.   Markov, N.   McKinnon, B.   Beck, S. Mey-Tal   Mineeva, T.   Mirazita, M.   Mokeev, V.   Montgomery, R. A.   Camacho, C. Munoz   Mustapha, B.   Niccolai, S.   Osipenko, M.   Ostrovidov, A. I.   Paolone, M.   Paremuzyan, R.   Park, K.   Pasyuk, E.   Patsyuk, M.   Pogorelko, O.   Price, J. W.   Prok, Y.   Protopopescu, D.   Ripani, M.   Riser, D.   Rizzo, A.   Rosner, G.   Rossi, P.   Sabatie, F.   Salgado, C.   Schumacher, R. A.   Segarra, E. P.   Sharabian, G.   Skorodumina, I. U.   Sokhan, D.   Sparveris, N.   Stepanyan, S.   Strauch, S.   Taiuti, M.   Tan, J. A.   Ungaro, M.   Voskanyan, H.   Voutier, E.   Watts, D. P.   Wei, X.   Wood, M.   Zachariou, N.   Zhang, J.   Zhao, Z. W.   Zheng, X.  

    The atomic nucleus is made of protons and neutrons (nucleons), which are themselves composed of quarks and gluons. Understanding how the quark-gluon structure of a nucleon bound in an atomic nucleus is modified by the surrounding nucleons is an outstanding challenge. Although evidence for such modification-known as the EMC effect-was first observed over 35 years ago, there is still no generally accepted explanation for its cause(1-3). Recent observations suggest that the EMC effect is related to close-proximity short-range correlated (SRC) nucleon pairs in nuclei(4,5). Here we report simultaneous, high-precision measurements of the EMC effect and SRC abundances. We show that EMC data can be explained by a universal modification of the structure of nucleons in neutron-proton SRC pairs and present a data-driven extraction of the corresponding universal modification function. This implies that in heavier nuclei with many more neutrons than protons, each proton is more likely than each neutron to belong to an SRC pair and hence to have distorted quark structure. This universal modification function will be useful for determining the structure of the free neutron and thereby testing quantum chromodynamics symmetry-breaking mechanisms and may help to discriminate between nuclear physics effects and beyond-the-standard-model effects in neutrino experiments.
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  • Mass-dependent cuts in longitudinal phase space

    Pauli, P.   Glazier, D. I.   Battaglieri, M.   Celentano, A.   De Vita, R.   Diehl, S.   Filippi, A.   Londergan, J. T.   Mathieu, V.   Szczepaniak, A. P.  

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  • Probing leptophilic dark sectors at electron beam-dump facilities

    Marsicano, L.   Battaglieri, M.   Celentano, A.   De Vita, R.   Zhong, Yi-Ming  

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  • photoproduction from threshold to

    Goetz, J. T.   Hicks, K.   Kunkel, M. C.   Price, J. W.   Weygand, D. P.   Adhikari, S.   Anefalos Pereira, S.   Battaglieri, M.   Bedlinskiy, I.   Biselli, A. S.   Boiarinov, S.   Bookwalter, C.   Briscoe, W. J.   Brooks, W. K.   Burkert, V. D.   Cao, F.   Carman, D. S.   Celentano, A.   Chandavar, S.   Chatagnon, P.   Chetry, T.   Ciullo, G.   Cole, P. L.   Contalbrigo, M.   Crede, V.   D'Angelo, A.   Dashyan, N.   De Vita, R.   Defurne, M.   Deur, A.   Diehl, S.   Djalali, C.   Dugger, M.   Dupre, R.   Egiyan, H.   Ehrhart, M.   El Alaoui, A.   El Fassi, L.   Elouadrhiri, L.   Eugenio, P.   Fedotov, G.   Filippi, A.   Gevorgyan, N.   Ghandilyan, Y.   Girod, F. X.   Glazier, D. I.   Golovatch, E.   Gothe, R. W.   Griffioen, K. A.   Guidal, M.   Guo, L.   Hafidi, K.   Hakobyan, H.   Harrison, N.   Hattawy, M.   Heddle, D.   Holtrop, M.   Ireland, D. G.   Ishkhanov, B. S.   Isupov, E. L.   Jo, H. S.   Joosten, S.   Kabir, M. L.   Keller, D.   Khachatryan, G.   Khachatryan, M.   Khandaker, M.   Kim, A.   Kim, W.   Klein, F. J.   Kubarovsky, V.   Lanza, L.   Livingston, K.   MacGregor, I. J. D.   McKinnon, B.   Meyer, C. A.   Mirazita, M.   Mokeev, V.   Movsisyan, A.   Munoz Camacho, C.   Nadel-Turonski, P.   Niccolai, S.   Niculescu, G.   Osipenko, M.   Ostrovidov, A. I.   Paolone, M.   Paremuzyan, R.   Park, K.   Pasyuk, E.   Pogorelko, O.   Prok, Y.   Protopopescu, D.   Raue, B. A.   Ripani, M.   Riser, D.   Rizzo, A.   Rosner, G.   Sabatié, F.   Saini, M. S.   Salgado, C.   Schott, D.   Schumacher, R. A.   Sharabian, Y. G.   Skorodumina, Iu.   Sober, D. I.   Sokhan, D.   Sparveris, N.   Strakovsky, I. I.   Strauch, S.   Taiuti, M.   Tan, J. A.   Ungaro, M.   Voskanyan, H.   Voutier, E.   Wang, R.   Wei, X.   Wood, M. H.   Zachariou, N.   Zhang, J.   Zhao, Z. W.  

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  • A radial time projection chamber for alpha detection in CLAS at JLab

    Dupre, R.   Stepanyan, S.   Hattawy, M.   Baltzell, N.   Hafidi, K.   Battaglieri, M.   Bueltmann, S.   Celentano, A.   De Vita, R.   El Alaoui, A.   El Fassi, L.   Fenker, H.   Kosheleva, K.   Kuhn, S.   Musico, P.   Minutoli, S.   Oliver, M.   Perrin, Y.   Torayev, B.   Voutier, E.  

    A new Radial Time Projection Chamber (RTPC) was developed at the Jefferson Laboratory to track low-energy nuclear recoils to measure exclusive nuclear reactions, such as coherent deeply virtual Compton scattering and coherent meson production off He-4. In 2009, we carried out these measurements using the CEBAF Large Acceptance Spectrometer (CLAS) supplemented by the RTPC positioned directly around a gaseous He-4 target, allowing a detection threshold as low as 12 MeV for He-4. This article discusses the design, principle of operation, calibration methods and performances of this RTPC.
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  • Measuring gravitational effects on antimatter in space

    Piacentino, Giovanni Maria   Gioiosa, Antonio   Palladino, Anthony   Venanzoni, Graziano   Battaglieri, M.   Curciarello, F.   Mandaglio, G.   Raggi, M.   Valente, P.  

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  • The PADME experiment at LNF

    Raggi, M.   Battaglieri, M.   Curciarello, F.   Mandaglio, G.   Raggi, M.   Valente, P.  

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  • The HPS experiment at JLab

    De Napoli, Marzio   Battaglieri, M.   Curciarello, F.   Mandaglio, G.   Raggi, M.   Valente, P.  

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  • The End Point Tagger physics program at A2@MAMI

    Steffen, Oliver   Battaglieri, M.   Curciarello, F.   Mandaglio, G.   Raggi, M.   Valente, P.  

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  • Compton Scattering Program Studying Nucleon Polarizabilities

    Martel, Philippe   Biroth, Maik   Collicott, Cristina   Paudyal, Dilli   Rajabi, Ali   Battaglieri, M.   Curciarello, F.   Mandaglio, G.   Raggi, M.   Valente, P.  

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