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1. Pattern recognition and PID for COMPASS RICH-1

Author: Abbon, P., Alexeev, M., Angerer, H., Birsa, R., Bordalo, P., Bradamante, F., Bressan, A., Chiosso, M., Ciliberti, P., Colantoni, M. L., Dafni, T., Torre, S. Dalla, Delagnes, E., Denisov, O., Deschamps, H., Diaz, V., Dibiase, N., Duic, V., Eyrich, W., Ferrero, A., Finger, M., Finger Jr, M., Fischer, H., Gerassimov, S., Giorgi, M., Gobbo, B., Hagemann, R., von Harrach, D., Heinsius, F. H., Joosten, R., Ketzer, B., Kolosov, V. N., Königsmann, K., Konorov, I., Kramer, D., Kunne, F., Lehmann, A., Levorato, S., Maggiora, A., Magnon, A., Mann, A., Martin, A., Menon, G., Mutter, A., Nähle, O., Nerling, F., Neyret, D., Panzieri, D., Paul, S., Pesaro, G., Pizzolotto, C., Polak, J., Rebourgeard, P., Robinet, F., Rocco, E., Schiavon, P., Schill, C., Schoenmeier, P., Schröder, W., Silva, L., Slunecka, M., Sozzi, F., Steiger, L., Sulc, M., Svec, M., Takekawa, S., Tessarotto, F., Teufel, A., and Wollny, H.
Subjects: Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract: A package for pattern recognition and PID by COMPASS RICH-1 has been developed and used for the analysis of COMPASS data collected in the years 2002 to 2004, and 2006-2007 with the upgraded RICH-1 photon detectors. It has allowed the full characterization of the detector in the starting version and in the upgraded one, as well as the PID for physics results. We report about the package structure and algorithms, and the detector characterization and PID results., Comment: 4 pages, 4 figures,to appear in the proceedings of 6th International Workshop on Ring Imaging Cherenkov Counters (RICH 2007), Trieste, Italy, 15-20 Oct 2007
Published: 2009
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2. Micromegas in a Bulk

Author: Giomataris, I., De Oliveira, R., Andriamonje, S., Aune, S., Charpak, G., Colas, P., Giganon, A., Rebourgeard, Ph., and Salin, P.
Subjects: Physics - Instrumentation and Detectors
Abstract: In this paper we present a novel way to manufacture the bulk Micromegas detector. A simple process based on the PCB (Printed Circuit Board) technology is employed to produce the entire sensitive detector. Such fabrication process could be extended to very large area detectors made by the industry. The low cost fabrication together with the robustness of the electrode materials will make it extremely attractive for several applications ranging from particle physics and astrophysics to medicine, Comment: 6 pages, 4 figures
Published: 2005
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3. The COMPASS RICH-1 detector upgrade

Author: Abbon, P., Alekseev, M., Angerer, H., Apollonio, M., Birsa, R., Bordalo, P., Bradamante, F., Bressan, A., Busso, L., Chiosso, M., Ciliberti, P., Colantoni, M. L., Costa, S., Dalla Torre, S., Dafni, T., Delagnes, E., Deschamps, H., Diaz, V., Dibiase, N., Duic, V., Eyrich, W., Faso, D., Ferrero, A., Finger, M., Finger, Jr., M., Fischer, H., Gerassimov, S., Giorgi, M., Gobbo, B., Hagemann, R., von Harrach, D., Heinsius, F. H., Joosten, R., Ketzer, B., Königsmann, K., Kolosov, V. N., Konorov, I., Kramer, D., Kunne, F., Lehmann, A., Levorato, S., Maggiora, A., Magnon, A., Mann, A., Martin, A., Menon, G., Mutter, A., Nähle, O., Nerling, F., Neyret, D., Pagano, P., Panebianco, S., Panzieri, D., Paul, S., Pesaro, G., Polak, J., Rebourgeard, P., Robinet, F., Rocco, E., Schiavon, P., Schill, C., Schröder, W., Silva, L., Slunecka, M., Sozzi, F., Steiger, L., Sulc, M., Svec, M., Tessarotto, F., Teufel, A., and Wollny, H.
Published: 2008
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4. Design and construction of the fast photon detection system for COMPASS RICH-1

Author: J. Polak, M. Alexeev, V.N. Kolosov, Christian Schill, M. L. Colantoni, L. Steiger, H. Wollny, P. Schoenmeier, G. Menon, S. Gerassimov, F. Kunne, D. Neyret, M. Slunečka, M. Svec, A. Mann, A. Mutter, N. Dibiase, A. Lehmann, V. Duic, P. Ciliberti, S. Levorato, D. Panzieri, V. Diaz, B. Ketzer, F. Robinet, K. Königsmann, R. Joosten, R. Hagemann, B. Gobbo, M. Finger, W. Schröder, Eric Delagnes, M. Chiosso, Andrea Ferrero, F. Nerling, S. Dalla Torre, T. Dafni, R. Birsa, A. Maggiora, A. Teufel, Anne-Laure Martin, Laura Silva, F. Tessarotto, Daniel B. Kramer, P. Bordalo, F. Sozzi, P. Rebourgeard, S. Takekawa, H. Deschamps, H. Fischer, Soumen Paul, Ph. Abbon, O. Nähle, Andrea Bressan, C. Pizzolotto, I. Konorov, F.H. Heinsius, Miroslav Sulc, A. Magnon, M. Giorgi, O. Y. Denisov, W. Eyrich, D. von Harrach, G. Pesaro, Elena Rocco, Franco Bradamante, P. Schiavon, H. Angerer, Département d'Electronique, des Détecteurs et d'Informatique pour la Physique (ex SEDI) (DEDIP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Département de Physique Nucléaire (ex SPhN) (DPHN), COMPASS, P., Abbon, M., Alexeev, H., Angerer, R., Birsa, P., Bordalo, Bradamante, Franco, Bressan, Andrea, M., Chiosso, Ciliberti, Piero, M., Colantoni, T., Dafni, S., Dallatorre, E., Delagne, O., Denisov, H., Deschamp, V., Diaz, N., Dibiase, Duic, Venicio, W., Eyrich, A., Ferrero, M., Finger, M., Fingerjr, H., Fischer, S., Gerassimov, Giorgi, Marcello, B., Gobbo, R., Hagemann, D., Vonharrach, F. H., Heinsiu, R., Joosten, B., Ketzer, V. N., Kolosov, K., Koenigsmann, I., Konorov, D., Kramer, F., Kunne, A., Lehmann, Levorato, Stefano, A., Maggiora, A., Magnon, A., Mann, Martin, Anna, G., Menon, A., Mutter, O., Naehle, F., Nerling, D., Neyret, D., Panzieri, S., Paul, Pesaro, Giulia, C., Pizzolotto, J., Polak, P., Rebourgeard, F., Robinet, E., Rocco, Schiavon, Paolo, C., Schill, P., Schoenmeier, W., Schroeder, L., Silva, M., Slunecka, Sozzi, Federica, L., Steiger, M., Sulc, M., Svec, Takekawa, Stefano, F., Tessarotto, A., Teufel, and H., Wollny
Subjects: Nuclear and High Energy Physics, Photomultiplier, Physics::Instrumentation and Detectors, Multi-anode photo-multiplier, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], COMPASS, 01 natural sciences, Particle identification, law.invention, Optics, RICH, Quartz lens telescope, law, Compass, 0103 physical sciences, COMPASS experiment, Angular resolution, Electronics, 010306 general physics, Instrumentation, Cherenkov radiation, Physics, Large Hadron Collider, 010308 nuclear & particles physics, business.industry, Lens (optics), High Energy Physics::Experiment, business
Abstract: International audience; New photon detectors, based on the use of multi-anode photo-multiplier tubes coupled to individual lens telescopes and read out with a dedicated read-out electronics system, equip the central region of the Cherenkov imaging counter RICH-1 of the COMPASS experiment at CERN SPS. They are characterised by high photon yield, fast response and high rate capability and are successfully in operation since the 2006 COMPASS data taking. The photon detection system fully matches the expected performance. The design and construction of the photon detectors are described in detail.
Published: 2010
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5. The COMPASS RICH-1 fast photon detection system

Author: P. Abbon, M. Alexeev, H. Angerer, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, M. Chiosso, P. Ciliberti, M.L. Colantoni, T. Dafni, S. Dalla Torre, E. Delagnes, O. Denisov, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, A. Ferrero, M. Finger, M. Finger Jr., H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, R. Hagemann, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, V.N. Kolosov, K. Königsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, P. Schiavon, C. Schill, P. Schoenmeier, W. Schröder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, S. Takekawa, F. Tessarotto, A. Teufel, H. Wollny, Abbon, P, Alexeev, M, Angerer, H, Birsa, R, Bordalo, P, Bradamante, F, Bressan, Andrea, Chiosso, M, Ciliberti, Piero, COLANTONI M., L, Dafni, T, DALLA TORRE, S, Delagnes, E, Denisov, O, Deschamps, H, Diaz, V, Dibiase, N, Duic, V, Eyrich, W, Ferrero, A, Finger, M, FINGER M., Jr, Fischer, H, Gerassimov, S, Giorgi, M, Gobbo, B, Hagemann, R, VON HARRACH, D, HEINSIUS F., H, Joosten, R, Ketzer, B, KOLOSOV V., N, Königsmann, K, Konorov, I, Kramer, D, Kunne, F, Lehmann, A, Levorato, Stefano, Maggiora, A, Magnon, A, Mann, A, Martin, Anna, Menon, G, Mutter, A, Nähle, O, Nerling, F, Neyret, D, Panzieri, D, Paul, S, Pesaro, G, Pizzolotto, C, Polak, J, Rebourgeard, P, Robinet, F, Rocco, E, Schiavon, Paolo, Schill, C, Schoenmeier, P, Schröder, W, Silva, L, Slunecka, M, Sozzi, F, Steiger, L, Sulc, M, Svec, M, Takekawa, Stefano, Tessarotto, F, Teufel, A, and Wollny, H.
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, Physics::Instrumentation and Detectors, business.industry, Photon detector, Detector, law.invention, Lens (optics), Optics, Upgrade, law, Compass, Systems design, Optoelectronics, High Energy Physics::Experiment, business, Instrumentation, Photon detection
Abstract: A fast photon detection system has been built as a part of the upgrade of the COMPASS RICH-1 detector: it is based on 576 multi-anode photomultiplier tubes (MAPMTs) coupled to individual fused silica lens telescopes and fast readout electronics. This system has replaced the MWPCs with CsI photo-cathodes in the central region ( 1.3 m 2 , 25% of the total area) of the COMPASS RICH-1 photon detectors and has successfully been operated during the data taking in 2006 and 2007. We report about the fast photon detection system design, construction and commissioning, in particular about the design optimization and the validation tests of the lens telescopes. Preliminary values for the increased performances of COMPASS RICH-1 after the upgrade are also presented.
Published: 2008
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6. The fast readout system for the MAPMTs of COMPASS RICH-1

Author: P. Abbon, M. Alexeev, H. Angerer, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, M. Chiosso, P. Ciliberti, M.L. Colantoni, T. Dafni, S. Dalla Torre, E. Delagnes, O. Denisov, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, R. Hagemann, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, V.N. Kolosov, K. Königsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, P. Schiavon, C. Schill, P. Schoenmeier, W. Schröder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, S. Takekawa, F. Tessarotto, A. Teufel, H. Wollny, Abbon, P, Alexeev, M, Angerer, H, Birsa, R, Bordalo, P, Bradamante, Franco, Bressan, Andrea, Chiosso, M, Ciliberti, Piero, COLANTONI M., L, Dafni, T, DALLA TORRE, S, Delagnes, E, Denisov, O, Deschamps, H, Diaz, V, Dibiase, N, Duic, V, Eyrich, W, Ferrero, A, Finger, M, FINGER M., Jr, Fischer, H, Gerassimov, S, Giorgi, M, Gobbo, B, Hagemann, R, VON HARRACH, D, HEINSIUS F., H, Joosten, R, Ketzer, B, KOLOSOV V., N, Königsmann, K, Konorov, I, Kramer, D, Kunne, F, Lehmann, A, Levorato, Stefano, Maggiora, A, Magnon, A, Mann, A, Martin, Anna, Menon, G, Mutter, A, Nähle, O, Nerling, F, Neyret, D, Panzieri, D, Paul, S, Pesaro, G, Pizzolotto, C, Polak, J, Rebourgeard, P, Robinet, F, Rocco, E, Schiavon, Paolo, Schill, C, Schoenmeier, P, Schröder, W, Silva, L, Slunecka, M, Sozzi, F, Steiger, L, Sulc, M, Svec, M, Takekawa, Stefano, Tessarotto, F, Teufel, A, and Wollny, H.
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, business.industry, Detector, Photon flux, FOS: Physical sciences, Readout electronics, Instrumentation and Detectors (physics.ins-det), Chip, Particle identification, Upgrade, Optics, Compass, Detectors and Experimental Techniques, business, Instrumentation
Abstract: A fast readout system for the upgrade of the COMPASS RICH detector has been developed and successfully used for data taking in 2006 and 2007. The new readout system for the multi-anode PMTs in the central part of the photon detector of the RICH is based on the high-sensitivity MAD4 preamplifier-discriminator and the dead-time free F1-TDC chip characterized by high-resolution. The readout electronics has been designed taking into account the high photon flux in the central part of the detector and the requirement to run at high trigger rates of up to 100 kHz with negligible dead-time. The system is designed as a very compact setup and is mounted directly behind the multi-anode photomultipliers. The data are digitized on the frontend boards and transferred via optical links to the readout system. The read-out electronics system is described in detail together with its measured performances., Comment: Proceeding of RICH2007 Conference, Trieste, Oct. 2007. v2: minor changes
Published: 2008
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7. A new analogue sampling readout system for the COMPASS RICH-1 detector

Author: S. Gerassimov, S. Panebianco, I. Konorov, F. Kunne, B. Ketzer, A. Magnon, Eric Delagnes, Soumen Paul, T. Dafni, N. Kravtchuk, V.N. Kolosov, D. Neyret, P. Rebourgeard, Ph. Abbon, and H. Deschamps
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, business.industry, Detector, Integrated circuit, Dead time, Chip, Signal, Noise (electronics), law.invention, Optics, Sampling (signal processing), law, Compass, business, Instrumentation
Abstract: A new electronic readout for CsI-coated multiwire proportional chambers (MWPC), used as photon detectors in the COMPASS ring imaging Cherenkov (RICH) detector, is described. A prototype system comprising more than 5000 channels has been built and tested in high-intensity beam conditions. It is based on the APV25-S1 analogue sampling chip, and replaces the GASSIPLEX chip readout used previously. The APV25 chip, although originally designed for Silicon microstrip detectors, is shown to perform well even with “slow” signals from an MWPC, maintaining a signal-to-noise ratio (SNR) of 9. For every trigger the system reads out three consecutive amplitudes in time, thus allowing to extract information on both the signal amplitude and its timing. This information is used to reduce pile-up events in a high-rate environment. Prototype tests of the new readout electronics on a central RICH photocathode in nominal COMPASS beam conditions showed that the effective time window is reduced from more than 3 μ s for the GASSIPLEX to less than 400 ns for the APV25 chip. This leads to a significant improvement of the signal-to-background ratio (SBR) with respect to the original readout. A gain by a factor of 5–6 was experimentally verified in the very forward region of phase space, where pile-up due to the muon beam halo is most significant. Owing to its pipelined architecture, the new readout system also considerably reduces the dead time per event, thus allowing to make use of trigger rates exceeding 50 kHz .
Published: 2008
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8. The COMPASS experiment at CERN

Author: P. Abbon, E. Albrecht, V.Yu. Alexakhin, Yu. Alexandrov, G.D. Alexeev, M.G. Alekseev, A. Amoroso, H. Angerer, V.A. Anosov, B. Badełek, F. Balestra, J. Ball, J. Barth, G. Baum, M. Becker, Y. Bedfer, P. Berglund, C. Bernet, R. Bertini, M. Bettinelli, R. Birsa, J. Bisplinghoff, P. Bordalo, M. Bosteels, F. Bradamante, A. Braem, A. Bravar, A. Bressan, G. Brona, E. Burtin, M.P. Bussa, V.N. Bytchkov, M. Chalifour, A. Chapiro, M. Chiosso, P. Ciliberti, A. Cicuttin, M. Colantoni, A.A. Colavita, S. Costa, M.L. Crespo, P. Cristaudo, T. Dafni, N. d’Hose, S. Dalla Torre, C. d’Ambrosio, S. Das, S.S. Dasgupta, E. Delagnes, R. De Masi, P. Deck, N. Dedek, D. Demchenko, O.Yu. Denisov, L. Dhara, V. Diaz, N. Dibiase, A.M. Dinkelbach, A.V. Dolgopolov, A. Donati, S.V. Donskov, V.A. Dorofeev, N. Doshita, D. Durand, V. Duic, W. Dünnweber, A. Efremov, P.D. Eversheim, W. Eyrich, M. Faessler, V. Falaleev, P. Fauland, A. Ferrero, L. Ferrero, M. Finger, H. Fischer, C. Franco, J. Franz, F. Fratnik, J.M. Friedrich, V. Frolov, U. Fuchs, R. Garfagnini, L. Gatignon, F. Gautheron, O.P. Gavrichtchouk, S. Gerassimov, R. Geyer, J.M. Gheller, A. Giganon, M. Giorgi, B. Gobbo, S. Goertz, A.M. Gorin, F. Gougnaud, S. Grabmüller, O.A. Grajek, A. Grasso, B. Grube, A. Grünemaier, A. Guskov, F. Haas, R. Hagemann, J. Hannappel, D. von Harrach, T. Hasegawa, J. Heckmann, S. Hedicke, F.H. Heinsius, R. Hermann, C. Heß, F. Hinterberger, M. von Hodenberg, N. Horikawa, S. Horikawa, I. Horn, C. Ilgner, A.I. Ioukaev, S. Ishimoto, I. Ivanchin, O. Ivanov, T. Iwata, R. Jahn, A. Janata, R. Joosten, N.I. Jouravlev, E. Kabuß, V. Kalinnikov, D. Kang, F. Karstens, W. Kastaun, B. Ketzer, G.V. Khaustov, Yu.A. Khokhlov, J. Kiefer, Yu. Kisselev, F. Klein, K. Klimaszewski, S. Koblitz, J.H. Koivuniemi, V.N. Kolosov, E.V. Komissarov, K. Kondo, K. Königsmann, A.K. Konoplyannikov, I. Konorov, V.F. Konstantinov, A.S. Korentchenko, A. Korzenev, A.M. Kotzinian, N.A. Koutchinski, O. Kouznetsov, K. Kowalik, D. Kramer, N.P. Kravchuk, G.V. Krivokhizhin, Z.V. Kroumchtein, J. Kubart, R. Kuhn, V. Kukhtin, F. Kunne, K. Kurek, N.A. Kuzmin, M. Lamanna, J.M. Le Goff, M. Leberig, A.A. Lednev, A. Lehmann, V. Levinski, S. Levorato, V. I Lyashenko, J. Lichtenstadt, T. Liska, I. Ludwig, A. Maggiora, M. Maggiora, A. Magnon, G.K. Mallot, A. Mann, I.V. Manuilov, C. Marchand, J. Marroncle, A. Martin, J. Marzec, L. Masek, F. Massmann, T. Matsuda, D. Matthiä, A.N. Maximov, G. Menon, W. Meyer, A. Mielech, Yu.V. Mikhailov, M.A. Moinester, F. Molinié, F. Mota, A. Mutter, T. Nagel, O. Nähle, J. Nassalski, S. Neliba, F. Nerling, D. Neyret, M. Niebuhr, T. Niinikoski, V.I. Nikolaenko, A.A. Nozdrin, A.G. Olshevsky, M. Ostrick, A. Padee, P. Pagano, S. Panebianco, B. Parsamyan, D. Panzieri, S. Paul, B. Pawlukiewicz, H. Pereira, D.V. Peshekhonov, V.D. Peshekhonov, D. Piedigrossi, G. Piragino, S. Platchkov, K. Platzer, J. Pochodzalla, J. Polak, V.A. Polyakov, G. Pontecorvo, A.A. Popov, J. Pretz, S. Procureur, C. Quintans, J.-F. Rajotte, S. Ramos, I. Razaq, P. Rebourgeard, D. Reggiani, G. Reicherz, A. Richter, F. Robinet, E. Rocco, E. Rondio, L. Ropelewski, J.Y. Roussé, A.M. Rozhdestvensky, D. Ryabchikov, A.G. Samartsev, V.D. Samoylenko, A. Sandacz, M. Sans Merce, H. Santos, M.G. Sapozhnikov, F. Sauli, I.A. Savin, P. Schiavon, C. Schill, T. Schmidt, H. Schmitt, L. Schmitt, P. Schönmeier, W. Schroeder, D. Seeharsch, M. Seimetz, D. Setter, A. Shaligin, O.Yu. Shevchenko, A.A. Shishkin, H.-W. Siebert, L. Silva, F. Simon, L. Sinha, A.N. Sissakian, M. Slunecka, G.I. Smirnov, D. Sora, S. Sosio, F. Sozzi, A. Srnka, F. Stinzing, M. Stolarski, V.P. Sugonyaev, M. Sulc, R. Sulej, G. Tarte, N. Takabayashi, V.V. Tchalishev, S. Tessaro, F. Tessarotto, A. Teufel, D. Thers, L.G. Tkatchev, T. Toeda, V.V. Tokmenin, S. Trippel, J. Urban, R. Valbuena, G. Venugopal, M. Virius, N.V. Vlassov, A. Vossen, M. Wagner, R. Webb, E. Weise, Q. Weitzel, U. Wiedner, M. Wiesmann, R. Windmolders, S. Wirth, W. Wiślicki, H. Wollny, A.M. Zanetti, K. Zaremba, M. Zavertyaev, J. Zhao, R. Ziegler, M. Ziembicki, Y.L. Zlobin, A. Zvyagin, Abbon, P, Albrecht, E, ALEXAKHIN V., Yu, Alexandrov, Yu, ALEXEEV G., D, ALEKSEEV M., G, Amoroso, A, Angerer, H, ANOSOV V., A, Badelek, B, Balestra, F, Ball, J, Barth, J, Baum, G, Becker, M, Bedfer, Y, Berglund, P, Bernet, C, Bertini, R, Bettinelli, M, Birsa, R, Bisplinghoff, J, Bordalo, P, Bosteels, M, Bradamante, Franco, Braem, A, Bravar, A, Bressan, Andrea, Brona, G, Burtin, E, BUSSA M., P, BYTCHKOV V., N, Chalifour, M, Chapiro, A, Chiosso, M, Ciliberti, Piero, Cicuttin, A, Colantoni, M, COLAVITA A., A, Costa, S, CRESPO M., L, Cristaudo, P, Dafni, T, D'Hose, N, DALLA TORRE, S, D'Ambrosio, C, Das, S, DASGUPTA S., S, Delagnes, E, DE MASI, R, Deck, P, Dedek, N, Demchenko, D, DENISOV O., Yu, Dhara, L, Diaz, V, Dibiase, N, DINKELBACH A., M, DOLGOPOLOV A., V, Donati, A, DONSKOV S., V, DOROFEEV V., A, Doshita, N, Durand, D, Duic, V, Dünnweber, W, Efremov, A, EVERSHEIM P., D, Eyrich, W, Faessler, M, Falaleev, V, Fauland, P, Ferrero, A, Ferrero, L, Finger, M, FINGER M., Jr, Fischer, H, Franco, C, Franz, J, Fratnik, F, FRIEDRICH J., M, Frolov, V, Fuchs, U, Garfagnini, R, Gatignon, L, Gautheron, F, GAVRICHTCHOUK O., P, Gerassimov, S, Geyer, R, GHELLER J., M, Giganon, A, Giorgi, Marcello, Gobbo, B, Goertz, S, GORIN A., M, Gougnaud, F, Grabmüller, S, GRAJEK O., A, Grasso, A, Grube, B, Grünemaier, A, Guskov, A, Haas, F, Hagemann, R, Hannappel, J, VON HARRACH, D, Hasegawa, T, Heckmann, J, Hedicke, S, HEINSIUS F., H, Hermann, R, Hess, C, Hinterberger, F, VON HODENBERG, M, Horikawa, N, Horikawa, S, Horn, I, Ilgner, C, IOUKAEV A., I, Ishimoto, S, Ivanchin, I, Ivanov, O, Iwata, T, Jahn, R, Janata, A, Joosten, R, JOURAVLEV N., I, Kabuss, E, Kalinnikov, V, Kang, D, Karstens, F, Kastaun, W, Ketzer, B, KHAUSTOV G., V, KHOKHLOV Y. U., A, Kiefer, J, Kisselev, Yu, Klein, F, Klimaszewski, K, Koblitz, S, KOIVUNIEMI J., H, KOLOSOV V., N, KOMISSAROV E., V, Kondo, K, Königsmann, K, KONOPLYANNIKOV A., K, Konorov, I, KONSTANTINOV V., F, KORENTCHENKO A., S, Korzenev, A, KOTZINIAN A., M, KOUTCHINSKI N., A, Kouznetsov, O, Kowalik, K, Kramer, D, KRAVCHUK N., P, KRIVOKHIZHIN G., V, KROUMCHTEIN Z., V, Kubart, J, Kuhn, R, Kukhtin, V, Kunne, F, Kurek, K, KUZMIN N., A, Lamanna, M, LE GOFF J., M, Leberig, M, LEDNEV A., A, Lehmann, A, Levinski, V, Levorato, Stefano, I., LYASHENKO V, Lichtenstadt, J, Liska, T, Ludwig, I, Maggiora, A, Maggiora, M, Magnon, A, MALLOT G., K, Mann, A, MANUILOV I., V, Marchand, C, Marroncle, J, Martin, Anna, Marzec, J, Masek, L, Massmann, F, Matsuda, T, Matthiä, D, MAXIMOV A., N, Menon, G, Meyer, W, Mielech, A, MIKHAILOV Y. U., V, MOINESTER M., A, Molinié, F, Mota, F, Mutter, A, Nagel, T, Nähle, O, Nassalski, J, Neliba, S, Nerling, F, Neyret, D, Niebuhr, M, Niinikoski, T, NIKOLAENKO V., I, NOZDRIN A., A, OLSHEVSKY A., G, Ostrick, M, Padee, A, Pagano, P, Panebianco, S, Parsamyan, B, Panzieri, D, Paul, S, Pawlukiewicz, B, Pereira, H, PESHEKHONOV D., V, PESHEKHONOV V., D, Piedigrossi, D, Piragino, G, Platchkov, S, Platzer, K, Pochodzalla, J, Polak, J, POLYAKOV V., A, Pontecorvo, G, POPOV A., A, Pretz, J, Procureur, S, Quintans, C, RAJOTTE J., F, Ramos, S, Razaq, I, Rebourgeard, P, Reggiani, D, Reicherz, G, Richter, A, Robinet, F, Rocco, E, Rondio, E, Ropelewski, L, ROUSSÉ J., Y, ROZHDESTVENSKY A., M, Ryabchikov, D, SAMARTSEV A., G, SAMOYLENKO V., D, Sandacz, A, SANS MERCE, M, Santos, H, SAPOZHNIKOV M., G, Sauli, F, SAVIN I., A, Schiavon, Paolo, Schill, C, Schmidt, T, Schmitt, H, Schmitt, L, Schönmeier, P, Schroeder, W, Seeharsch, D, Seimetz, M, Setter, D, Shaligin, A, SHEVCHENKO O., Yu, SHISHKIN A., A, SIEBERT H., W, Silva, L, Simon, F, Sinha, L, SISSAKIAN A., N, Slunecka, M, SMIRNOV G., I, Sora, D, Sosio, S, Sozzi, F, Srnka, A, Stinzing, F, Stolarski, M, SUGONYAEV V., P, Sulc, M, Sulej, R, Tarte, G, Takabayashi, N, TCHALISHEV V., V, Tessaro, S, Tessarotto, F, Teufel, A, Thers, D, TKATCHEV L., G, Toeda, T, TOKMENIN V., V, Trippel, S, Urban, J, Valbuena, R, Venugopal, G, Virius, M, VLASSOV N., V, Vossen, A, Wagner, M, Webb, R, Weise, E, Weitzel, Q, Wiedner, U, Wiesmann, M, Windmolders, R, Wirth, S, Wisblicki, W, Wollny, H, ZANETTI A., M, Zaremba, K, Zavertyaev, M, Zhao, J, Ziegler, R, Ziembicki, M, ZLOBIN Y., L, and Zvyagin, A.
Subjects: Nuclear and High Energy Physics, straw tube detector, Physics::Instrumentation and Detectors, Project commissioning, FOS: Physical sciences, fixed-target experiment, RICH detector, hadron structure, High Energy Physics - Experiment, target, MWPC, Nuclear physics, High Energy Physics - Experiment (hep-ex), Compass, Hadron spectroscopy, COMPASS experiment, scintillating fibre detector, Nuclear Experiment, silicon microstrip detectors, Instrumentation, Silicon microstrip detectors, Physics, Large Hadron Collider, Structure function, MicroMegas detector, front-end electronics, DAQ, micromegas detector, drift chamber, Physics::Accelerator Physics, High Energy Physics::Experiment, polarised, GEM detector, calorimetry, Particle Physics - Experiment, polarised DIS
Abstract: The COMPASS experiment makes use of the CERN SPS high-intensitymuon and hadron beams for the investigation of the nucleon spin structure and the spectroscopy of hadrons. One or more outgoing particles are detected in coincidence with the incoming muon or hadron. A large polarized target inside a superconducting solenoid is used for the measurements with the muon beam. Outgoing particles are detected by a two-stage, large angle and large momentum range spectrometer. The setup is built using several types of tracking detectors, according to the expected incident rate, required space resolution and the solid angle to be covered. Particle identification is achieved using a RICH counter and both hadron and electromagnetic calorimeters. The setup has been successfully operated from 2002 onwards using a muon beam. Data with a hadron beam were also collected in 2004. This article describes the main features and performances of the spectrometer in 2004; a short summary of the 2006 upgrade is also given., 84 papes, 74 figures
Published: 2007
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9. Gluon polarization in the nucleon from quasi-real photoproduction of high-pT hadron pairs

Author: R. Sulej, S. Neliba, P. Berglund, B. Grube, M.G. Sapozhnikov, H. Schmitt, A. Maggiora, E. Rondio, M. Varanda, A. Zvyagin, W. Kastaun, Colin Bernet, A. Srnka, I. Konorov, M.P. Bussa, A. Korzenev, E.S. Ageev, F. H. Heinsius, S. Gerassimov, J. M. Le Goff, T. Toeda, Marc Wagner, P.D. Eversheim, A. Mielech, S. Ishimoto, Frank Klein, K. Kondo, K. Zaremba, M. Wiesmann, J. Reymann, A.A. Shishkin, V. Duic, Sergey Donskov, O.P. Gavrichtchouk, S. Platchkov, P. Rebourgeard, Y. Bedfer, N. Dedek, L. Sinha, F. Balestra, S. Paul, R. Ziegler, V.N. Kolosov, V.A. Polyakov, N.P. Kravchuk, A.K. Konoplyannikov, J. Zhao, R. Jahn, A. Gorin, V. Diaz, M. Maggiora, R. Ijaduola, N. Takabayashi, R. De Masi, P. Bordalo, J. Bisplinghoff, Massimo Lamanna, Yu. Kisselev, A. Amoroso, Vladimir Peshekhonov, R. Birsa, E.V. Komissarov, Andres Cicuttin, J. Lichtenstadt, Norihiro Doshita, G. Piragino, N. d'Hose, Yu.A. Khokhlov, A. Maximov, G. Reicherz, Josef Pochodzalla, I. Ludwig, Naoaki Horikawa, M. Ostrick, Aram Kotzinian, R. Windmolders, A.A. Nozdrin, J. Nassalski, M. Giorgi, R. Bertini, Andrea Ferrero, Oleg V. Ivanov, R. Joosten, S. Dalla Torre, A. N. Sissakian, J.M. Friedrich, V.D. Samoylenko, Yu. Alexandrov, P. Fauland, Christian Schill, C. Marchand, M.E. Ladygin, V.F. Obraztsov, M. Finger, E. Weise, L. Ferrero, D. Kang, M.L. Colantoni, K. Königsmann, S. Hedicke, A. Colavita, S. Horikawa, R. C. Webb, A.M. Dinkelbach, K. Platzer, V.N. Bytchkov, A.V. Dolgopolov, S. Procureur, K. Kowalik, A.B. Sadovski, L. Cerini, V.I. Tretyak, J. Pretz, A. Grünemaier, G.V. Krivokhizhin, O.A. Grajek, N.A. Koutchinski, M. von Hodenberg, A. Sandacz, F. Karstens, U. Wiedner, S. S. Dasgupta, G.V. Khaustov, L. Schmitt, A. Grasso, M. Stolarski, J. Franz, L. G. Tkatchev, F. Stinzing, Grzegorz Brona, Miroslav Sulc, D. Thers, Anna Zanetti, A. Janata, Franco Bradamante, Gerhard K. Mallot, J. Ehlers, F. Kunne, V.V. Tchalishev, N.I. Jouravlev, S. Costa, E. Burtin, V.F. Konstantinov, W. Meyer, Maria Liz Crespo, A.I. Ioukaev, F. Sozzi, R. Hermann, E. M. Kabuß, Paolo Pagano, V.P. Sugonyaev, Q. Weitzel, A.A. Popov, S. Ramos, J.H. Koivuniemi, K. Rith, F. Hinterberger, P. Schiavon, S. Panebianco, H. Fischer, K. Medved, Alan D. Martin, Z.V. Kroumchtein, W. Eyrich, T. Hasegawa, A. Chapiro, Murray Moinester, T. Schmidt, D. Neyret, M. A. Faessler, Alessandro Bressan, D. von Harrach, C. Ilgner, Yu.V. Mikhailov, S. Trousov, J. Marzec, R. Geyer, A.G. Olshevsky, St. Goertz, O.Yu. Denisov, C. Heß, A. Magnon, L. Dhara, M. Slunecka, Takahiro Iwata, E. Saller, S. Koblitz, M. Sans, B. Gobbo, B. Badelek, J. Marroncle, A. Teufel, Miroslav Virius, K. Kurek, A. Padee, B. Ketzer, D. Peshekhonov, W. Wiślicki, H. D. Pereira, N.V. Vlassov, S. Wirth, C. Quintans, J. Hannappel, Günter Baum, O.Yu. Shevchenko, I.A. Savin, A. Bravar, V.I. Nikolaenko, R. Garfagnini, H.-W. Siebert, I. Manuilov, V. Falaleev, D. Panzieri, T. Liška, M. Fabro, M. Leberig, A.M. Rozhdestvensky, N. V. Khomutov, J. Ball, G.I. Smirnov, Fabrice Gautheron, T. Matsuda, V. Frolov, V.Yu. Alexakhin, W. Dünnweber, G. D. Alexeev, V.A. Dorofeev, A.S. Korentchenko, F. Tessarotto, R. Kuhn, O. Nähle, V. Kalinnikov, and A. Skachkova
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Muon, 010308 nuclear & particles physics, Hadron, Deep inelastic scattering, 01 natural sciences, Helicity, Gluon, Nuclear physics, 0103 physical sciences, COMPASS experiment, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: We present a determination of the gluon polarization Δ G / G in the nucleon, based on the helicity asymmetry of quasi-real photoproduction events, Q 2 1 ( GeV / c ) 2 , with a pair of large transverse-momentum hadrons in the final state. The data were obtained by the COMPASS experiment at CERN using a 160 GeV polarized muon beam scattered on a polarized 6 LiD target. The helicity asymmetry for the selected events is 〈 A ∥ / D 〉 = 0.002 ± 0.019 ( stat ) ± 0.003 ( syst ) . From this value, we obtain in a leading-order QCD analysis Δ G / G = 0.024 ± 0.089 ( stat ) ± 0.057 ( syst ) at x g = 0.095 and μ 2 ≃ 3 ( GeV / c ) 2 .
Published: 2006
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10. The gaseous microstrip detector Micromegas for the high-luminosity COMPASS experiment at CERN

Author: P. Rebourgeard, E. Delagnes, Ph. Abbon, G. Tarte, S Platchkov, A. Giganon, J.-M. Le Goff, A. Magnon, James Ball, C. Marchand, D. Thers, D. Neyret, H. Pereira, Y. Bedfer, S. Procureur, S. Panebianco, C. Bernet, and F. Kunne
Subjects: Physics, Nuclear and High Energy Physics, Large Hadron Collider, Luminosity (scattering theory), Physics::Instrumentation and Detectors, Detector, MicroMegas detector, STRIPS, Radiation length, law.invention, Nuclear physics, law, Compass, COMPASS experiment, High Energy Physics::Experiment, Instrumentation
Abstract: The measurements in the COMPASS experiment at CERN require high-resolution tracking detectors, with low radiation length and high-rate capability. For this purpose we have developed and optimized a gaseous microstrip detector `Micromegas'. Twelve planes with 1024 strips each, assembled in 3 stations of 4 views XYUV, are now being operated with success in the COMPASS environment. We describe here the performances and results obtained.
Published: 2005
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11. Particle identification with COMPASS RICH-1

Author: P. Abbon, M. Alexeev, H. Angerer, G. Baum, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, M. Chiosso, P. Ciliberti, M. Colantoni, T. Dafni, S. Dalla Torre, E. Delagnes, O. Denisov, H. Deschamps, N. Dibiase, V. Duic, W. Eyrich, A. Ferrero, M. Finger, H. Fischer, C. Franco, S. Gerassimov, M. Giorgi, B. Gobbo, R. Hagemann, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, V.N. Kolosov, K. Königsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, G. Sbrizzai, P. Schiavon, C. Schill, P. Schoenmeier, W. Schröder, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, S. Takekawa, F. Tessarotto, A. Teufel, H. Wollny, Département d'Electronique, des Détecteurs et d'Informatique pour la Physique (ex SEDI) (DEDIP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Département de Physique Nucléaire (ex SPhN) (DPHN), COMPASS, P., Abbon, M., Alexeev, H., Angerer, G., Baum, R., Birsa, P., Bordalo, Bradamante, Franco, Bressan, Andrea, M., Chiosso, Ciliberti, Piero, M., Colantoni, T., Dafni, S., Dallatorre, E., Delagne, O., Denisov, H., Deschamp, N., Dibiase, Duic, Venicio, W., Eyrich, A., Ferrero, M., Finger, M., Fingerjr, H., Fischer, C., Franco, S., Gerassimov, Giorgi, Marcello, B., Gobbo, R., Hagemann, D., Vonharrach, F. H., Heinsiu, R., Joosten, B., Ketzer, V. N., Kolosov, K., Koenigsmann, I., Konorov, D., Kramer, F., Kunne, A., Lehmann, Levorato, Stefano, A., Maggiora, A., Magnon, A., Mann, Martin, Anna, G., Menon, A., Mutter, O., Naehle, F., Nerling, D., Neyret, D., Panzieri, S., Paul, Pesaro, Giulia, C., Pizzolotto, J., Polak, P., Rebourgeard, F., Robinet, E., Rocco, Sbrizzai, Giulio, Schiavon, Paolo, C., Schill, P., Schoenmeier, W., Schroeder, M., Slunecka, Sozzi, Federica, L., Steiger, M., Sulc, M., Svec, Takekawa, Stefano, F., Tessarotto, A., Teufel, and H., Wollny
Subjects: Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, COMPASS, Particle identification, Compass, 0103 physical sciences, COMPASS experiment, Computer vision, 010306 general physics, Instrumentation, RICH, Physics, 010308 nuclear & particles physics, business.industry, Detector, Software package, Likelihood algorithms, Pattern recognition (psychology), High Energy Physics::Experiment, Artificial intelligence, business, Photon detection, Data reduction
Abstract: International audience; RICH-1 is a large size RICH detector in operation at the COMPASS experiment since 2001 and recently upgraded implementing a new photon detection system with increased performance.A dedicated software package has been developed to perform RICH-1 data reduction, pattern recognition and particle identification as well as a number of accessory tasks for detector studies.The software package, the algorithms implemented and the detector characterisation and performance are reported in detail.
Published: 2011
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12. The gaseous microstrip detector micromegas for the COMPASS experiment at CERN

Author: H. Pereira, S Platchkov, D. Neyret, G. Tarte, A. Magnon, D. Thers, Y. Bedfer, James Ball, P. Rebourgeard, A. Giganon, Ph. Abbon, F. Kunn, C. Bernet, Eric Delagnes, and J.-M. Le Goff
Subjects: Physics, Nuclear and High Energy Physics, Large Hadron Collider, Physics::Instrumentation and Detectors, business.industry, Detector, MicroMegas detector, STRIPS, Tracking (particle physics), Radiation length, law.invention, Nuclear physics, Optics, law, Compass, COMPASS experiment, High Energy Physics::Experiment, business
Abstract: The measurements foreseen in the COMPASS experiment at CERN, require high resolution tracking detectors, with low radiation length and high rate capability. For this purpose we have developed and optimized a gaseous microstrip detector ‘Micromegas’. Twelve planes with 1024 strips each, assembled in 3 stations of 4 views XYUV, have been operated with success in the summer of 2002 in the COMPASS environment. We describe here the performances and results obtained.
Published: 2003
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13. The experience of building and operating COMPASS RICH-1

Author: P. Abbon, M. Alexeev, H. Angerer, G. Baum, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, M. Chiosso, P. Ciliberti, M. Colantoni, T. Dafni, S. Dalla Torre, E. Delagnes, O. Denisov, H. Deschamps, N. Dibiase, V. Duic, W. Eyrich, A. Ferrero, M. Finger, H. Fischer, C. Franco, S. Gerassimov, M. Giorgi, B. Gobbo, R. Hagemann, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, V.N. Kolosov, K. Königsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, G. Sbrizzai, P. Schiavon, C. Schill, P. Schoenmeier, W. Schröder, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, S. Takekawa, F. Tessarotto, A. Teufel, H. Wollny, Département d'Electronique, des Détecteurs et d'Informatique pour la Physique (ex SEDI) (DEDIP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Département de Physique Nucléaire (ex SPhN) (DPHN), P., Abbon, M., Alexeev, H., Angerer, G., Baum, R., Birsa, P., Bordalo, Bradamante, Franco, Bressan, Andrea, M., Chiosso, Ciliberti, Piero, M., Colantoni, T., Dafni, S., Dallatorre, E., Delagne, O., Denisov, H., Deschamp, N., Dibiase, Duic, Venicio, W., Eyrich, A., Ferrero, M., Finger, M., Fingerjr, H., Fischer, C., Franco, S., Gerassimov, Giorgi, Marcello, B., Gobbo, R., Hagemann, D., Vonharrach, F. H., Heinsiu, R., Joosten, B., Ketzer, V. N., Kolosov, K., Koenigsmann, I., Konorov, D., Kramer, F., Kunne, A., Lehmann, Levorato, Stefano, A., Maggiora, A., Magnon, A., Mann, Martin, Anna, G., Menon, A., Mutter, O., Naehle, F., Nerling, D., Neyret, D., Panzieri, S., Paul, Pesaro, Giulia, C., Pizzolotto, J., Polak, P., Rebourgeard, F., Robinet, E., Rocco, Sbrizzai, Giulio, Schiavon, Paolo, C., Schill, P., Schoenmeier, W., Schroeder, M., Slunecka, Sozzi, Federica, L., Steiger, M., Sulc, M., Svec, Takekawa, Stefano, F., Tessarotto, A., Teufel, and H., Wollny
Subjects: Nuclear and High Energy Physics, Cherenkov detector, Physics::Instrumentation and Detectors, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], COMPASS, 01 natural sciences, Particle identification, law.invention, Nuclear physics, CsI, MAPMT, Photon detection, PID, RICH, Instrumentation, Optics, law, Compass, 0103 physical sciences, COMPASS experiment, CsI photoconverter, 010306 general physics, Event reconstruction, Physics, Large Hadron Collider, Spectrometer, 010308 nuclear & particles physics, business.industry, Upgrade, High Energy Physics::Experiment, business
Abstract: COMPASS RICH-1 is a large size gaseous Imaging Cherenkov Detector providing hadron identification in the range from 3 to 55 GeV/c, in the wide acceptance spectrometer of the COMPASS Experiment at CERN SPS. It uses a 3 m long C(4)F(10) radiator, a 21 m(2) large VUV mirror surface and two kinds of photon detectors: MAPMTs and MWPCs with CsI photocathodes, covering a total of 5.5 m(2). It is in operation since 2002 and its performance has increased in time thanks to progressive optimization and mostly to a major upgrade which was implemented in 2006. The main characteristics of COMPASS RICH-1 components are described and some specific aspects related to the radiator gas system, the mirror alignment, the MWPC electrical stability and the readout electronics are discussed. Some key features of the event reconstruction and the PID analysis are presented together with results from the COMPASS RICH-1 performance characterization study. (C) 2010 Elsevier B.V. All rights reserved.
Published: 2010
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14. Particle identification with the fast COMPASS RICH-1 detector

Author: P. Abbon, M. Alexeev, H. Angerer, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, M. Chiosso, P. Ciliberti, M.L. Colantoni, T. Dafni, S. Dalla Torre, E. Delagnes, O. Denisov, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, R. Hagemann, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, V.N. Kolosov, K. Königsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, P. Schiavon, C. Schill, W. Schröder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, S. Takekawa, F. Tessarotto, A. Teufel, H. Wollny, Département d'Electronique, des Détecteurs et d'Informatique pour la Physique (ex SEDI) (DEDIP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Département de Physique Nucléaire (ex SPhN) (DPHN), COMPASS, P., Abbon, M., Alexeev, H., Angereri, R., Birsa, P., Bordalo, Bradamante, Franco, Bressan, Andrea, M., Chiosso, Ciliberti, Piero, M. L., Colantoni, T., Dafni, S., Dalla Torre, E., Delagne, O., Denisov, H., Deschamp, V., Diaz, N., Dibiase, Duic, Venicio, W., Eyric, A., Ferrero, M., Finger, M. Finger J., R., H., Fischer, S., Gerassimov, Giorgi, Marcello, B., Gobbo, R., Hageman, D., von Harrach, F. H., Heinsiu, R., Jooste, B., Ketzeri, V. N., Kolosov, K., Königsman, I., Konorovi, D., Kramer, F., Kunne, A., Lehman, Levorato, Stefano, A., Maggiora, A., Magnon, A., Manni, Martin, Anna, G., Menon, A., Mutter, O., Näh, F., Nerling, D., Neyret, D., Panzieri, S., Pauli, Pesaro, Giulia, C., Pizzolotto, J., Pola, P., Rebourgeard, F., Robinet, E., Rocco, Schiavon, Paolo, C., Schill, W., Schröder, L., Silva, M., Slunecka, Sozzi, Federica, L., Steiger, M., Sulc, M., Svec, Takekawa, Stefano, F., Tessarotto, A., Teufeld, and H., Wollny
Subjects: Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Photon detector, Multi-anode photo-multiplier, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, High resolution, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, COMPASS, Particle identification, TDC, Optics, Compass, 0103 physical sciences, 010306 general physics, Instrumentation, RICH, Physics, 010308 nuclear & particles physics, business.industry, Detector, Charge (physics), Front-end electronics, Upgrade, High Energy Physics::Experiment, business, Photon detection, Front-end electronic
Abstract: International audience; A new photon detection system for the COMPASS RICH-1 detector has been designed and installed. In the central region, the project is based on multi-anode photo-multiplier technology accompanied by charge sensitive, high resolution and dead-time free time digitization. In the outer area, only the readout electronics for the existing photon detectors has been replaced. Details on the detector upgrade and its performance are presented.
Published: 2010
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15. Micromegas, a multipurpose gaseous detector

Author: J. Derre, Y. Giomataris, Georges Charpak, and P. Rebourgeard
Subjects: Gaseous detectors, Nuclear physics, Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Neutron imaging, Detector, MicroMegas detector, Time resolution, Instrumentation, Microstrip, Charged particle
Abstract: In this paper the advantages of a new gaseous detector. Micromegas, are described. Some of its properties are given and the consequences are out-lined in a series of experiments related to charged particle localization, neutron imaging, gamma or X-ray imaging.
Published: 2002
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16. A highly integrated low-cost readout system for the COMPASS RICH-1 detector2007 IEEE Nuclear Science Symposium Conference Record

Author: P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, P. Bordalo, L. Busso, M. Chiosso, M. L. Colantoni, S. Costa, T. Dafni, E. Delagnes, H. Deschamps, V. Diaz, N. Dibiase, W. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fischer, M. Georgi, S. Gerassimov, B. Gobbo, R. Hagemann, D. von Harrach, F. H. Heinsius, R. Joosten, B. Ketzer, V. N. Kolosov, K. Konigsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, A. Maggiora, A. Magnon, A. Mann, G. Menon, A. Mutter, O. Nahle, F. Nerling, D. Neyret, S. Panebianco, D. Panzieri, S. Paul, C. Pizzolotto, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, C. Schill, W. Schroder, L. Silva, M. Slunecka, L. Steiger, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, H. Wollny, BIRSA, RENATO, BRADAMANTE, FRANCO, BRESSAN, Andrea, CILIBERTI, PIERO, DALLA TORRE, SILVIA, DUIC, VENICIO, LEVORATO, STEFANO, MARTIN, ANNA, PAGANO, PAOLO, PESARO, GIULIA, SCHIAVON, PAOLO, SOZZI, FEDERICA, Bo Yu, P., Abbon, M., Alekseev, H., Angerer, M., Apollonio, Birsa, Renato, P., Bordalo, Bradamante, Franco, Bressan, Andrea, L., Busso, M., Chiosso, Ciliberti, Piero, M. L., Colantoni, S., Costa, T., Dafni, DALLA TORRE, Silvia, E., Delagne, H., Deschamp, V., Diaz, N., Dibiase, Duic, Venicio, W., Eyrich, D., Faso, A., Ferrero, M., Finger, H., Fischer, M., Georgi, S., Gerassimov, B., Gobbo, R., Hagemann, D., von Harrach, F. H., Heinsiu, R., Joosten, B., Ketzer, V. N., Kolosov, K., Konigsmann, I., Konorov, D., Kramer, F., Kunne, A., Lehmann, Levorato, Stefano, A., Maggiora, A., Magnon, A., Mann, Martin, Anna, G., Menon, A., Mutter, O., Nahle, F., Nerling, D., Neyret, Pagano, Paolo, S., Panebianco, D., Panzieri, S., Paul, Pesaro, Giulia, C., Pizzolotto, J., Polak, P., Rebourgeard, F., Robinet, E., Rocco, Schiavon, Paolo, C., Schill, W., Schroder, L., Silva, M., Slunecka, Sozzi, Federica, L., Steiger, M., Sulc, M., Svec, F., Tessarotto, A., Teufel, and H., Wollny
Subjects: Photons, Readout systems, Photodetectors, Field emission cathodes, Detectors, Detectors, Field emission cathodes, Particle beams, Photodetectors, Photomultipliers, Photons, Readout systems, Particle beams, Photomultipliers
Abstract: Particle identification at high multiplicities is a key feature of the COMPASS experiment at CERN's SPS. Hadrons up to 50 GeV/c are identified by a RICH detector with a large horizontal and vertical acceptance of ±250 mrad and ±180 mrad, respectively. The central region of the photon detector is equipped with multi-anode photomultiplier tubes, the remaining 75% of the total active area are covered by MWPCs with CsI photocathodes. In order to improve the performance of the detector at very high beam intensities, more than 62000 channels of a new analog readout system of file MWPCs, based on the APV25 chip, were developed and installed in 2006. The new system features good single photon detection efficiency due to its low noise, negligible dead time at trigger rates up to 50 kHz, and low cost. In addition, sampling of the MWPC signal allows us to measure the signal time with a resolution of about 30 ns or better. The architecture of the new readout system as well as the performance results of the RICH-1 detector in the outer region during 2006 COMPASS run will be discussed
Published: 2007

17. MICROMEGAS: high rate and radiation hardness results

Author: G. Puill, Y. Giomataris, J. Derre, and P. Rebourgeard
Subjects: Physics, Nuclear and High Energy Physics, Argon, Analytical chemistry, X-ray detector, chemistry.chemical_element, MicroMegas detector, Particle detector, Nuclear physics, Neon, chemistry.chemical_compound, Nuclear Energy and Engineering, chemistry, Isobutane, Tetrafluoromethane, Electrical and Electronic Engineering, Radiation hardening
Abstract: In this report, we present results of gain studies using various gas mixtures in a novel structure of a gaseous detector called MICROMEGAS which is under development at Saclay. We in particular studied the maximum of gain achievable with MICROMEGAS before the discharge. We tried various gas mixtures (argon, neon, CF/sub 4/) with various proportions of quencher (isobutane, cyclohexane, DME). We also studied the radiation hardness of MICROMEGAS using argon-isobutane and CF/sub 4/-isobutane mixtures.
Published: 1999
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18. Fast readout of the COMPASS RICH CsI-MWPC photon chambers

Author: E. Delagnes, S. Gerasimov, I. Konorov, B. Ketzer, A. Magnon, F. Tessaroto, F. Kunne, S. Panebianco, H. Deschamps, Soumen Paul, D. Neyret, N. Kravtchuk, P. Rebourgeard, and Ph. Abbon
Subjects: Physics, Nuclear and High Energy Physics, Photon, business.industry, Detector, Dead time, Chip, Signal, Optics, Sampling (signal processing), Compass, COMPASS experiment, business, Instrumentation
Abstract: A new readout system for CsI-coated MWPCs, used in the COMPASS RICH detector, has been proposed and tested in nominal high-rate conditions. It is based on the APV25-S1 analog sampling chip, and will replace the Gassiplex chip readout used up to now. The APV chip, originally designed for silicon microstrip detectors, is shown to perform well even with “slow” signals from a MWPC, keeping a signal-to-noise ratio of 9. For every trigger the system reads three consecutive in-time samples, thus allowing to extract information on the signal shape and its timing. The effective time window is reduced from ∼3 μs for the Gassiplex to below 400 ns for the APV25-S1 chip, reducing pile-up events at high particle rate. A significant improvement of the signal-to-background ratio by a factor 5–6 with respect to the original readout has been measured in the central region of the RICH detector. Due to its pipelined architecture, the new readout system also considerably reduces the dead time per event, allowing efficient data taking at higher trigger rate.
Published: 2006
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19. MICROMEGAS: a high-granularity position-sensitive gaseous detector for high particle-flux environments

Author: P. Rebourgeard, Y. Giomataris, Jean-Pierre Robert, and Georges Charpak
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, business.industry, Detector, MicroMegas detector, Ion, Anode, Electron avalanche, Single-photon avalanche diode, Gas electron multiplier, Optoelectronics, Granularity, Detectors and Experimental Techniques, business, Instrumentation
Abstract: We describe a novel structure for a gaseous detector that is under development at Saclay. It consists of a two-stage parallel-plate avalanche chamber of small amplification gap (100 microm) combined with a conversion-drift space. It allows a fast removal of positive ionsproduced during the avalanche development. Fast signals (3/4 1 ns) are obtained duirng the collection of the electron avalanche on the anode microstrip plane. The induced positive ion signal has a rise time of 100 ns. The fast evacuation of positive ions combined with the high granularity of the detector provide a high rate capability. Gas gains of up to $10^5$ have been achieved.
Published: 1996
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20. Behaviour of CeF3 scintillator in an LHC-like environment

Author: Remi Chipaux, J.-L. Faure, G. Dauphin, P. Rebourgeard, and J. Safieh
Subjects: inorganic chemicals, Physics, Nuclear and High Energy Physics, integumentary system, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Physics::Medical Physics, Nuclear Theory, Neutron stimulated emission computed tomography, technology, industry, and agriculture, Induced radioactivity, Neutron radiation, Neutron temperature, Nuclear physics, Neutron flux, biological sciences, Neutron cross section, lipids (amino acids, peptides, and proteins), Neutron, Nuclear Experiment, Instrumentation, Neutron activation
Abstract: The neutron radiation resistance of a sample of cerium fluoride has been investigated with the reactor ULYSSE. The fast, thermal and epithermal neutron fluxes and the gamma dose rate at the irradiation position have been determined. The overall irradiation conditions are analogous to the condition foreseen in the future electromagnetic calorimeters for high energy physics. The effect of neutron radiation on the transmission and photoluminescence properties has been studied up to a fast neutron fluence of 10 14 neutrons/cm 2 . The respective damage effect of gamma rays, thermal neutrons and fast neutrons is discussed, as well as the induced radioactivity observed.
Published: 1994
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21. The COMPASS RICH-1 detector upgrade

Author: P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, L. Busso, M. Chiosso, P. Ciliberti, M. L. Colantoni, S. Costa, S. Dalla Torre, T. Dafni, E. Delagnes, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, R. Hagemann, D. von Harrach, F. H. Heinsius, R. Joosten, B. Ketzer, K. Königsmann, V. N. Kolosov, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, P. Pagano, S. Panebianco, D. Panzieri, S. Paul, G. Pesaro, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, P. Schiavon, C. Schill, W. Schröder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, H. Wollny, Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Birsa, R, Bordalo, P, Bradamante, F, Bressan, Andrea, Busso, L, Chiosso, M, Ciliberti, Piero, COLANTONI M., L, Costa, S, DALLA TORRE, S, Dafni, T, Delagnes, E, Deschamps, H, Diaz, V, Dibiase, N, Duic, V, Eyrich, W, Faso, D, Ferrero, A, Finger, M, FINGER M., Jr, Fischer, H, Gerassimov, S, Giorgi, M, Gobbo, B, Hagemann, R, VON HARRACH, D, HEINSIUS F., H, Joosten, R, Ketzer, B, Königsmann, K, KOLOSOV V., N, Konorov, I, Kramer, D, Kunne, F, Lehmann, A, Levorato, S, Maggiora, A, Magnon, A, Mann, A, Martin, Anna, Menon, G, Mutter, A, Nähle, O, Nerling, F, Neyret, D, Pagano, P, Panebianco, S, Panzieri, D, Paul, S, Pesaro, G, Polak, J, Rebourgeard, P, Robinet, F, Rocco, E, Schiavon, Paolo, Schill, C, Schröder, W, Silva, L, Slunecka, M, Sozzi, F, Steiger, L, Sulc, M, Svec, M, Tessarotto, F, Teufel, A, and Wollny, H.
Subjects: Physics, Photomultiplier, Physics::Instrumentation and Detectors, business.industry, Cherenkov detector, Detector, General Physics and Astronomy, Ring-imaging Cherenkov detector, law.invention, Nuclear physics, Upgrade, Optics, law, Compass, COMPASS experiment, High Energy Physics::Experiment, General Materials Science, Physical and Theoretical Chemistry, business, Cherenkov radiation
Abstract: The COMPASS experiment at CERN provides hadron identification in a wide momentum range employing a large size gaseous Ring Imaging CHerenkov detector (RICH). The presence of large uncorrelated background in the COMPASS environment was limiting the efficiency of COMPASS RICH-1 in the very forward regime. A major upgrade of RICH-1 required a new technique for Cherenkov photon detection at count rates of several 106/s per channel in the central detector part, and a read-out system allowing for trigger rates of up to 100 kHz. To cope with these requirements, the photon detectors of the central region have been replaced with a fast photon detection system described here, while, in the peripheral regions, the existing multi-wire proportional chambers with CsI photo-cathodes have been equipped with a new read-out system based on APV preamplifiers and flash ADC chips. The new system consists of multi-anode photomultiplier tubes (MAPMTs) coupled to individual fused silica lens telescopes, and fast read-out electronics based on the MAD4 amplifier-discriminator and the dead-time free F1 TDC chip. The project was completely designed and implemented in less than two years: The upgraded detector is in operation since the 2006 CERN SPS run. We present the photon detection design, constructive aspects and test studies to characterise the single photon response of the MAPMTs coupled to the read-out system as well as the detector performance based on the 2006 data.
Published: 2008

22. Pattern recognition and PID for COMPASS RICH-1

Author: P. Abbon, M. Alexeev, H. Angerer, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, M. Chiosso, P. Ciliberti, M.L. Colantoni, T. Dafni, S. Dalla Torre, E. Delagnes, O. Denisov, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, R. Hagemann, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, V.N. Kolosov, K. Königsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, P. Schiavon, C. Schill, P. Schoenmeier, W. Schröder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, S. Takekawa, F. Tessarotto, A. Teufel, H. Wollny, Abbon, P, Alexeev, M, Angerer, H, Birsa, R, Bordalo, P, Bradamante, F, Bressan, Andrea, Chiosso, M, Ciliberti, Piero, COLANTONI M., L, Dafni, T, DALLA TORRE, S, Delagnes, E, Denisov, O, Deschamps, H, Diaz, V, Dibiase, N, Duic, V, Eyrich, W, Ferrero, A, Finger, M, FINGER M., Jr, Fischer, H, Gerassimov, S, Giorgi, M, Gobbo, B, Hagemann, R, VON HARRACH, D, HEINSIUS F., H, Joosten, R, Ketzer, B, KOLOSOV V., N, Königsmann, K, Konorov, I, Kramer, D, Kunne, F, Lehmann, A, Levorato, Stefano, Maggiora, A, Magnon, A, Mann, A, Martin, Anna, Menon, G, Mutter, A, Nähle, O, Nerling, F, Neyret, D, Panzieri, D, Paul, S, Pesaro, G, Pizzolotto, C, Polak, J, Rebourgeard, P, Robinet, F, Rocco, E, Schiavon, Paolo, Schill, C, Schoenmeier, P, Schröder, W, Silva, L, Slunecka, M, Sozzi, F, Steiger, L, Sulc, M, Svec, M, Takekawa, Stefano, Tessarotto, F, Teufel, A, and Wollny, H.
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, Physics - Instrumentation and Detectors, business.industry, Photon detector, Detector, PID controller, FOS: Physical sciences, Pattern recognition, Instrumentation and Detectors (physics.ins-det), Photon yield, Particle identification, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Compass, Pattern recognition (psychology), Artificial intelligence, Detectors and Experimental Techniques, business, Instrumentation
Abstract: A package for pattern recognition and PID by COMPASS RICH-1 has been developed and used for the analysis of COMPASS data collected in the years 2002 to 2004, and 2006-2007 with the upgraded RICH-1 photon detectors. It has allowed the full characterization of the detector in the starting version and in the upgraded one, as well as the PID for physics results. We report about the package structure and algorithms, and the detector characterization and PID results., 4 pages, 4 figures,to appear in the proceedings of 6th International Workshop on Ring Imaging Cherenkov Counters (RICH 2007), Trieste, Italy, 15-20 Oct 2007
Published: 2008

23. Read-out electronics for fast photon detection with COMPASS RICH-1

Author: P. Abbon, M. Alexeev, H. Angerer, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, M. Chiosso, P. Ciliberti, M. Colantoni, T. Dafni, S. Dalla Torre, E. Delagnes, O. Denisov, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, R. Hagemann, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, V.N. Kolosov, K. Königsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, P. Schiavon, C. Schill, P. Schoenmeier, W. Schröder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, S. Takekawa, F. Tessarotto, A. Teufel, and H. Wollny
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, business.industry, Detector, Chip, Particle identification, Optics, Compass, COMPASS experiment, Electronics, business, Instrumentation, Photon detection
Abstract: A new read-out electronics system has been developed for the fast photon detection of the central region of the COMPASS RICH-1. The project is based on multi-anode photomultipliers read out by the high-sensitivity MAD4 preamplifier-discriminator and the dead-time free F1 TDC chip characterised by high time resolution. The system has been designed taking into account the high photon flux in the central region of the detector and the high rate requirement of the COMPASS experiment. The system is described in detail together with the measured performances. The new electronics system has been installed and used for the 2006 data taking; it entirely fulfils the expected performances.
Published: 2008

24. The characterisation of the multianode photomultiplier tubes for the RICH-1 upgrade project at COMPASS

Author: P. Abbon, M. Alexeev, H. Angerer, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, M. Chiosso, P. Ciliberti, M.L. Colantoni, T. Dafni, S. Dalla Torre, E. Delagnes, O. Denisov, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, R. Hagemann, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, V.N. Kolosov, K. Königsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, P. Schiavon, C. Schill, P. Schoenmeier, W. Schroeder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, S. Takekawa, F. Tessarotto, A. Teufel, H. Wollny, Abbon, P, Alexeev, M, Angerer, H, Birsa, R, Bordalo, P, Bradamante, F, Bressan, Andrea, Chiosso, M, Ciliberti, Piero, COLANTONI M., L, Dafni, T, DALLA TORRE, S, Delagnes, E, Denisov, O, Deschamps, H, Diaz, V, Dibiase, N, Duic, V, Eyrich, W, Ferrero, A, Finger, M, FINGER M., Jr, Fischer, H, Gerassimov, S, Giorgi, M, Gobbo, B, Hagemann, R, VON HARRACH, D, HEINSIUS F., H, Joosten, R, Ketzer, B, KOLOSOV V., N, Königsmann, K, Konorov, I, Kramer, D, Kunne, F, Lehmann, A, Levorato, Stefano, Maggiora, A, Magnon, A, Mann, A, Martin, Anna, Menon, G, Mutter, A, Nähle, O, Nerling, F, Neyret, D, Panzieri, D, Paul, S, Pesaro, G, Pizzolotto, C, Polak, J, Rebourgeard, P, Robinet, F, Rocco, E, Schiavon, Paolo, Schill, C, Schoenmeier, P, Schroeder, W, Silva, L, Slunecka, M, Sozzi, F, Steiger, L, Sulc, M, Svec, M, Takekawa, Stefano, Tessarotto, F, Teufel, A, and Wollny, H.
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, Photon, Physics::Instrumentation and Detectors, business.industry, Detector, Optics, Upgrade, Compass, Quantum efficiency, business, Instrumentation, Cherenkov radiation, Dark current
Abstract: A major upgrade of the Cherenkov photon detection system of COMPASS RICH-1 has been performed and it has been in operation since the 2006 physics run. The inner part of the photon detector has been replaced by a different technology in order to measure Cherenkov photons at high photoelectron rates, up to several times 10 6 per second and per channel. Cherenkov photons from 200 to 750 nm are detected by 576 multianode photomultiplier tubes (MAPMTs) with 16 channels each, coupled to individual fused silica lens telescopes and fast, high sensitivity and high time resolution electronics read-out. To guarantee an optimal performance of the complete system, parameters like dark current, gain, uniformity, relative quantum efficiency have been measured for a totality of more than 600 MAPMTs (about 10 000 channels) in a fully automated test-stand, developed for this purpose. The ideal working point for each individual pixel could be ascertained by these measurements. In 2006 the newly equipped detector exhibited an excellent performance: about 56 detected photons per ring at saturation and a time resolution of better than 1 ns. We report about the MAPMT characterisation and the quality control set-up, protocol and results.
Published: 2008

25. Fast photon detection for COMPASS RICH-1

Author: P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, L. Busso, M. Chiosso, P. Ciliberti, M.L. Colantoni, S. Costa, N. Dibiase, T. Dafni, S. Dalla Torre, V. Diaz, V. Duic, E. Delagnes, H. Deschamps, W. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, K. Königsmann, V.N. Kolosov, I. Konorov, D. Kramer, F. Kunne, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, D. Neyret, F. Nerling, P. Pagano, S. Paul, S. Panebianco, D. Panzieri, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, E. Rocco, F. Robinet, P. Schiavon, C. Schill, P. Schoenmeier, L. Silva, M. Slunecka, L. Steiger, F. Sozzi, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, H. Wollny, Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Birsa, R, Bordalo, P, Bradamante, Franco, Bressan, Andrea, Busso, L, Chiosso, M, Ciliberti, Piero, COLANTONI M., L, Costa, S, Dibiase, N, Dafni, T, TORRE S., Dalla, Diaz, V, Duic, V, Delagnes, E, Deschamps, H, Eyrich, W, Faso, D, Ferrero, A, Finger, M, FINGER M., Jr, Fischer, H, Gerassimov, S, Giorgi, Marcello, Gobbo, B, VON HARRACH, D, HEINSIUS F., H, Joosten, R, Ketzer, B, Königsmann, K, KOLOSOV V., N, Konorov, I, Kramer, D, Kunne, F, Levorato, Stefano, Maggiora, A, Magnon, A, Mann, A, Martin, Anna, Menon, G, Mutter, A, Nähle, O, Neyret, D, Nerling, F, Pagano, P, Paul, S, Panebianco, S, Panzieri, D, Pesaro, G, Pizzolotto, C, Polak, J, Rebourgeard, P, Rocco, E, Robinet, F, Schiavon, Paolo, Schill, C, Schoenmeier, P, Silva, L, Slunecka, M, Steiger, L, Sozzi, F, Sulc, M, Svec, M, Tessarotto, F, Teufel, A, and Wollny, H.
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, business.industry, UV lenses, Emphasis (telecommunications), Detector, COMPASS, Photocathode, Optics, Upgrade, Photon detection, Compass, RICH, Multianode photomultiplier tubes, Systems design, Electronics, business, Instrumentation
Abstract: A fast photon detection system has been built and assembled for the upgrade of COMPASS RICH-1. The system is based on multianode photomultipliers coupled to fused silica lenses to collect the light from a larger surface and to guide it to the photocathode, preserving the position information. The emphasis is on the fast response and high rate capability of the detectors and the associated electronics. The photon detection system is now ready and it will be employed in the 2006 COMPASS data taking. We report about the system design and construction.
Published: 2007

26. The fast photon detection system of COMPASS RICH-1

Author: P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, L. Busso, M. Chiosso, P. Ciliberti, M.L. Colantoni, S. Costa, T. Dafni, S. Dalla Torre, E. Delagnes, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, V.N. Kolosov, K. Königsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, P. Pagano, S. Panebianco, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, E. Rocco, F. Robinet, P. Schiavon, C. Schill, P. Schoenmeier, W. Schröder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, H. Wollny, Abbon, P., Alekseev, M., Angerer, H., Apollonio, M., Birsa, R., Bordalo, P., Bradamante, F., Bressan, A., Busso, L., Chiosso, M., Ciliberti, P., Colantoni, M. L., Costa, S., Dafni, T., Dalla Torre, S., Delagnes, E., Deschamps, H., Diaz, V., Dibiase, N., Duic, V., Eyrich, W., Faso, D., Ferrero, A., Finger, M., Finger Jr., M., Fischer, H., Gerassimov, S., Giorgi, M., Gobbo, B., von Harrach, D., Heinsius, F. H., Joosten, R., Ketzer, B., Kolosov, V. N., Königsmann, K., Konorov, I., Kramer, D., Kunne, F., Lehmann, A., Levorato, S., Maggiora, A., Magnon, A., Mann, A., Martin, A., Menon, G., Mutter, A., Nähle, O., Nerling, F., Neyret, D., Pagano, P., Panebianco, S., Panzieri, D., Paul, S., Pesaro, G., Pizzolotto, Cecilia, Polak, J., Rebourgeard, P., Rocco, E., Robinet, F., Schiavon, P., Schill, C., Schoenmeier, P., Schröder, W., Silva, L., Slunecka, M., Sozzi, F., Steiger, L., Sulc, M., Svec, M., Tessarotto, F., Teufel, A., Wollny, H., Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Birsa, R, Bordalo, P, Bradamante, F, Bressan, Andrea, Busso, L, Chiosso, M, Ciliberti, Piero, COLANTONI M., L, Costa, S, Dafni, T, DALLA TORRE, S, Delagnes, E, Deschamps, H, Diaz, V, Dibiase, N, Duic, V, Eyrich, W, Faso, D, Ferrero, A, Finger, M, FINGER M., Jr, Fischer, H, Gerassimov, S, Giorgi, M, Gobbo, B, VON HARRACH, D, HEINSIUS F., H, Joosten, R, Ketzer, B, KOLOSOV V., N, Königsmann, K, Konorov, I, Kramer, D, Kunne, F, Lehmann, A, Levorato, Stefano, Maggiora, A, Magnon, A, Mann, A, Martin, Anna, Menon, G, Mutter, A, Nähle, O, Nerling, F, Neyret, D, Pagano, P, Panebianco, S, Panzieri, D, Paul, S, Pesaro, G, Pizzolotto, C, Polak, J, Rebourgeard, P, Rocco, E, Robinet, F, Schiavon, Paolo, Schill, C, Schoenmeier, P, Schröder, W, Silva, L, Slunecka, M, Sozzi, F, Steiger, L, Sulc, M, Svec, M, Tessarotto, F, and Teufel, A
Subjects: Photomultiplier, Nuclear and High Energy Physics, Photon, Multi-anode photomultiplier tubes, Physics::Instrumentation and Detectors, UV lenses, COMPASS, Photon detection, RICH, Instrumentation, law.invention, FAST-RICH, DEUTERON, READOUT, DESIGN, Optics, law, Multi-anode photomultiplier tube, Compass, COMPASS experiment, Nuclear and High Energy Physic, Physics, Large Hadron Collider, business.industry, Detector, Lens (optics), Upgrade, UV lense, High Energy Physics::Experiment, business
Abstract: A fast photon detection system has been built for the upgrade of COMPASS RICH-1, the large size gaseous RICH detector in use at the COMPASS Experiment at the CERN SPS since 2001. The photon detectors of the central region have been replaced by a new system based on multi-anode photomultipliers coupled to individual fused silica lens telescopes and a fast readout electronics system, while in the outer region the existing MWPCs with CsI photocathodes have been equipped with a new readout system, based on the APV chip. RICH-1 has been successfully operated in its upgraded version during the 2006 run. We report on the upgrade design and construction, and on the preliminary characterization of the upgraded RICH-1 performances: at saturation about 60 photons per ring have routinely been obtained and the background level has drastically been reduced thanks to the good time resolution of the new system, leading to a 2 σ π –K separation above 55 GeV/c.
Published: 2007

27. A highly integrated low-cost readout system for the COMPASS RICH-1 detector

Author: P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, L. Busso, M. Chiosso, P. Ciliberti, M. L. Colantoni, S. Costa, T. Dafni, S. Dalla Torre, E. Delagnes, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fischer, M. Georgi, S. Gerassimov, B. Gobbo, R. Hagemann, D. von Harrach, F. H. Heinsius, R. Joosten, B. Ketzer, V. N. Kolosov, K. Konigsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nahle, F. Nerling, D. Neyret, P. Pagano, S. Panebianco, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, P. Schiavon, C. Schill, W. Schroder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, and H. Wollny
Subjects: Physics, Photomultiplier, Physics::Instrumentation and Detectors, business.industry, Detector, Photodetector, Dead time, Particle identification, Nuclear physics, Optics, Compass, Nuclear electronics, COMPASS experiment, High Energy Physics::Experiment, business
Abstract: Particle identification at high multiplicities is a key feature of the COMPASS experiment at CERN's SPS. Hadrons up to 50 GeV/c are identified by a RICH detector with a large horizontal and vertical acceptance of plusmn250 mrad and plusmn180 mrad, respectively. The central region of the photon detector is equipped with multi-anode photomultiplier tubes, the remaining 75% of the total active area are covered by MWPCs with Csl photocathodes. In order to improve the performance of the detector at very high beam intensities, more than 62000 channels of a new analog readout system of the MWPCs, based on the APV25 chip, were developed and installed in 2006. The new system features good single photon detection efficiency due to its low noise, negligible dead time at trigger rates up to 50 kHz, and low cost. In addition, sampling of the MWPC signal allows us to measure the signal time with a resolution of about 30 ns or better. The architecture of the new readout system as well as the performance results of the RICH-1 detector in the outer region during 2006 COMPASS run will be discussed.
Published: 2007
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28. Fast photon detection for the COMPASS RICH detector

Author: P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, R. Birsa, P. Bordalo, F. Bradainante, A. Bressan, L. Busso, M. Chiosso, P. Ciliberti, M.L. Colantoni, S. Costa, S. Dalla Torre, T. Dafni, E. Delagnes, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, R. Hagemann, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, K. Königsmann, V.N. Kolosov, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, P. Pagano, S. Panebianco, D. Panzieri, S. Paul, G. Pesaro, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, P. Schiavon, C. Schill, W. Schröder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, H. Wollny, Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Birsa, R, Bordalo, P, Bradamante, Franco, Bressan, Andrea, Busso, L, Chiosso, M, Ciliberti, Piero, COLANTONI M., L, Costa, S, DALLA TORRE, S, Dafni, T, Delagnes, E, Deschamps, H, Diaz, V, Dibiase, N, Duic, V, Eyrich, W, Faso, D, Ferrero, A, Finger, M, FINGER M., Jr, Fischer, H, Gerassimov, S, Giorgi, Marcello, Gobbo, B, Hagemann, R, VON HARRACH, D, HEINSIUS F., H, Joosten, R, Ketzer, B, Königsmann, K, KOLOSOV V., N, Konorov, I, Kramer, D, Kunne, F, Lehmann, A, Levorato, Stefano, Maggiora, A, Magnon, A, Mann, A, Martin, Anna, Menon, G, Mutter, A, Nähle, O, Nerling, F, Neyret, D, Pagano, P, Panebianco, S, Panzieri, D, Paul, S, Pesaro, G, Polak, J, Rebourgeard, P, Robinet, F, Rocco, E, Schiavon, Paolo, Schill, C, Schröder, W, Silva, L, Slunecka, M, Sozzi, F, Steiger, L, Sulc, M, Svec, M, Tessarotto, F, Teufel, A, and Wollny, H.
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, Physics - Instrumentation and Detectors, Photon, Large Hadron Collider, business.industry, Physics::Instrumentation and Detectors, Detector, Other Fields of Physics, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Atomic and Molecular Physics, and Optics, Ring-imaging Cherenkov detector, Optics, Compass, COMPASS experiment, High Energy Physics::Experiment, Detectors and Experimental Techniques, business, Cherenkov radiation
Abstract: The COMPASS experiment at the SPS accelerator at CERN uses a large scale Ring Imaging CHerenkov detector (RICH) to identify pions, kaons and protons in a wide momentum range. For the data taking in 2006, the COMPASS RICH has been upgraded in the central photon detection area (25% of the surface) with a new technology to detect Cherenkov photons at very high count rates of several 10^6 per second and channel and a new dead-time free read-out system, which allows trigger rates up to 100 kHz. The Cherenkov photons are detected by an array of 576 visible and ultra-violet sensitive multi-anode photomultipliers with 16 channels each. The upgraded detector showed an excellent performance during the 2006 data taking., Proceeding of the IPRD06 conference (Siena, Okt. 06)
Published: 2006

29. Design and status of COMPASS FAST-RICH

Author: P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, L. Busso, M. Chiosso, P. Ciliberti, M.L. Colantoni, S. Costa, S. Dalla Torre, E. Delagnes, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fisher, S. Gerassimov, M. Giorgi, B. Gobbo, D. von Harrach, F.H. Heinsius, S. Horikawa, R. Joosten, B. Ketzer, K. Königsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, A. Maggiora, A. Magnon, A. Martin, G. Menon, A. Mutter, O. Nähle, D. Neyret, P. Pagano, S. Panebianco, D. Panzieri, S. Paul, J. Polak, P. Rebourgeard, P. Schiavon, C. Schill, W. Schröder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, F. Tessarotto, A. Teufel, Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Birsa, R, Bordalo, P, Bradamante, F, Bressan, Andrea, Busso, L, Chiosso, M, Ciliberti, Piero, COLANTONI M., L, Costa, S, DALLA TORRE, S, Delagnes, E, Deschamps, H, Diaz, V, Dibiase, N, Duic, V, Eyrich, W, Faso, D, Ferrero, A, Finger, M, FINGER M., Jr, Fisher, H, Gerassimov, S, Giorgi, Marcello, Gobbo, B, VON HARRACH, D, HEINSIUS F., H, Horikawa, S, Joosten, R, Ketzer, B, Königsmann, K, Konorov, I, Kramer, D, Kunne, F, Lehmann, A, Maggiora, A, Magnon, A, Martin, Anna, Menon, G, Mutter, A, Nähle, O, Neyret, D, Pagano, P, Panebianco, S, Panzieri, D, Paul, S, Polak, J, Rebourgeard, P, Schiavon, Paolo, Schill, C, Schröder, W, Silva, L, Slunecka, M, Sozzi, F, Steiger, L, Sulc, M, Tessarotto, F, and Teufel, A.
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, business.industry, Context (language use), Photodetection, Chip, Photocathode, Optics, Upgrade, Compass, Electronics, business, Instrumentation
Abstract: In the context of the upgrade of COMPASS RICH-1, we are developing a fast photodetection system for RICH counters, based on UV extended Multi-Anode PhotoMultiplier Tubes (MAPMT) and a custom, low dead-time electronic readout system. Photons are concentrated on the MAPMT photocathode by an optical system that preserves the position information. The ratio between the collection and the photosensitive surfaces is ∼7.5 in our design, larger than in previous applications. A new front-end electronics, based on a modified version of the MAD4 discriminator chip, is being realized to digitize the MAPMT signals. We report about the design of the photodetection system and of the associated electronic readout system, and on the preliminary test beam results.
Published: 2006

30. Measurement of the Spin Structure of the Deuteron in the DIS Region

Author: A.A. Shishkin, A. Maggiora, K. Zaremba, J. Marroncle, Colin Bernet, V.A. Polyakov, K. Kowalik, A. Srnka, J. Bisplinghoff, Massimo Lamanna, Yu. Kisselev, E.V. Komissarov, Marc Wagner, U. Wiedner, N.P. Kravchuk, A.K. Konoplyannikov, L. G. Tkatchev, S. Wirth, C. Quintans, J. Hannappel, M. Ostrick, A. Amoroso, N. Dedek, L. Schmitt, M. Slunecka, A. Zvyagin, A.I. Ioukaev, W. Kastaun, R. Kuhn, L. Dhara, B. Badelek, J. Pretz, L. Ferrero, M. Sans, B. Gobbo, P. Berglund, E. Rondio, M.P. Bussa, Alan D. Martin, M.G. Sapozhnikov, S. Goertz, R. Geyer, O. Nähle, V. Kalinnikov, A. Skachkova, B. Ketzer, Yu.V. Mikhailov, A. Teufel, C. Heß, A.M. Rozhdestvensky, N. V. Khomutov, O.P. Gavrichtchouk, Vladimir Peshekhonov, R. Birsa, E. Burtin, V.F. Konstantinov, Q. Weitzel, F. Hinterberger, P. Schiavon, J. M. Le Goff, O.Yu. Denisov, L. Sinha, Aram Kotzinian, R. Windmolders, P.D. Eversheim, V. Duic, M. Wiesmann, J. Reymann, Takahiro Iwata, E. Saller, M.E. Ladygin, J. Ball, A. Chapiro, S. S. Dasgupta, T. Schmidt, N.A. Koutchinski, S. Koblitz, V.A. Dorofeev, K. Medved, J.M. Friedrich, A. Sandacz, J. Franz, A. Grasso, K. Platzer, H. Fischer, R. Jahn, J. Ehlers, D. Peshekhonov, Naoaki Horikawa, V.N. Bytchkov, R. Hermann, R. Ijaduola, W. Wiślicki, H. D. Pereira, Ulrich Fuchs, E. M. Kabuß, C. Ilgner, F. Stinzing, H. Schmitt, K. Rith, F. Karstens, Norihiro Doshita, N. d'Hose, G.I. Smirnov, Fabrice Gautheron, T. Matsuda, V. Frolov, Paolo Pagano, V.N. Kolosov, D. Thers, R. Ziegler, A. N. Sissakian, V.Yu. Alexakhin, A. Janata, J. Nassalski, Christian Schill, J. Lichtenstadt, R. Sulej, A.S. Korentchenko, F. Tessarotto, G. Piragino, V.V. Tchalishev, S. Costa, I. Ludwig, J.H. Koivuniemi, A.A. Nozdrin, W. Dünnweber, A. Bravar, Yu. Alexandrov, S. Panebianco, B. Grube, M. Giorgi, E.S. Ageev, O.A. Grajek, Miroslav Virius, G. D. Alexeev, P. Fauland, C. Marchand, V.F. Obraztsov, H.-W. Siebert, K. Kurek, S. Gerassimov, E. Weise, R. C. Webb, M. Finger, I. Manuilov, Sergey Donskov, M.L. Colantoni, S. Paul, F.H. Heinsius, S. Hedicke, A.G. Olshevsky, Franco Bradamante, A. Colavita, A.V. Dolgopolov, A. Magnon, T. Hasegawa, J. Zhao, G.V. Krivokhizhin, T. Toeda, Anna Zanetti, A. Mielech, S. Ishimoto, Frank Klein, D. Neyret, Yu.A. Khokhlov, S. Platchkov, A. Padee, A. Grünemaier, Miroslav Sulc, A. Gorin, V.P. Sugonyaev, S. Ramos, M. Stolarski, Gerhard K. Mallot, Z.V. Kroumchtein, J. Marzec, F. Sozzi, S. Neliba, I. Konorov, A. Korzenev, F. Balestra, M. Maggiora, Andres Cicuttin, G. Reicherz, Josef Pochodzalla, S. Dalla Torre, M. Fabro, M. Leberig, D. Panzieri, G.V. Khaustov, T. Liška, N.I. Jouravlev, S. Horikawa, I.A. Savin, W. Meyer, Maria Liz Crespo, V. Falaleev, A. Maximov, V.D. Samoylenko, W. Eyrich, M. A. Faessler, Alessandro Bressan, D. von Harrach, Oleg V. Ivanov, R. Joosten, M. Varanda, F. Kunne, V. Diaz Kavka, A.A. Popov, N. Takabayashi, R. De Masi, P. Bordalo, D. Kang, K. Königsmann, A.B. Sadovski, L. Cerini, V.I. Tretyak, N.V. Vlassov, Günter Baum, O.Yu. Shevchenko, K. Kondo, P. Rebourgeard, Y. Bedfer, R. Bertini, Andrea Ferrero, A.M. Dinkelbach, M. von Hodenberg, V.I. Nikolaenko, R. Garfagnini, Murray Moinester, S. Trousov, E. S., Ageev, Alexakhin, V. Y. U., Alexandrov, Y. U., G. D., Alexeev, A., Amoroso, B., Badelek, F., Balestra, J., Ball, G., Baum, Y., Bedfer, P., Berglund, C., Bernet, R., Bertini, R., Birsa, J., Bisplinghoff, P., Bordalo, Bradamante, Franco, A., Bravar, Bressan, Andrea, E., Burtin, M. P., Bussa, V. N., Bytchkov, L., Cerini, A., Chapiro, A., Cicuttin, M., Colantoni, A. A., Colavita, S., Costa, M. L., Crespo, N., D'Hose, S., DALLA TORRE, S. S., Dasgupta, R., DE MASI, N., Dedek, Denisov, O. Y. U., L., Dhara, V., DIAZ KAVKA, A. M., Dinkelbach, A. V., Dolgopolov, S. V., Donskov, V. A., Dorofeev, N., Doshita, Duic, Venicio, W., Dunnweber, J., Ehler, P. D., Eversheim, W., Eyrich, M., Fabro, M., Faessler, V., Falaleev, P., Fauland, A., Ferrero, L., Ferrero, M., Finger, Jr, H., Fischer, J., Franz, J. M., Friedrich, V., Frolov, U., Fuch, R., Garfagnini, F., Gautheron, O. P., Gavrichtchouk, S., Gerassimov, R., Geyer, Giorgi, Marcello, B., Gobbo, S., Goertz, A. M., Gorin, O., Grajek, A., Grasso, B., Grube, A., Grunemaier, J., Hannappel, D., VON HARRACH, T., Hasegawa, S., Hedicke, F. H., Heinsiu, R., Hermann, C., He, F., Hinterberger, M., VON HODENBERG, N., Horikawa, S., Horikawa, R. B., Ijaduola, C., Ilgner, A. I., Ioukaev, S., Ishimoto, O., Ivanov, T., Iwata, R., Jahn, A., Janata, R., Joosten, N. I., Jouravlev, E., Kabu, V., Kalinnikov, D., Kang, F., Karsten, W., Kastaun, B., Ketzer, G. V., Khaustov, Khokhlov, Y. U. A., N. V., Khomutov, Kisselev, Y. U., F., Klein, S., Koblitz, J. H., Koivuniemi, V. N., Kolosov, E. V., Komissarov, K., Kondo, K., Konigsmann, A. K., Konoplyannikov, I., Konorov, V. F., Konstantinov, A. S., Korentchenko, A., Korzenev, A. M., Kotzinian, N. A., Koutchinski, K., Kowalik, N. P., Kravchuk, G. V., Krivokhizhin, Z. V., Kroumchtein, R., Kuhn, F., Kunne, K., Kurek, M. E., Ladygin, M., Lamanna, J. M., LE GOFF, M., Leberig, J., Lichtenstadt, T., Liska, I., Ludwig, A., Maggiora, M., Maggiora, A., Magnon, G. K., Mallot, I. V., Manuilov, C., Marchand, J., Marroncle, Martin, Anna, J., Marzec, T., Matsuda, A. N., Maximov, K. S., Medved, W., Meyer, A., Mielech, Mikhailov, Y. U. V., M. A., Moinester, O., Nahle, J., Nassalski, S., Neliba, D. P., Neyret, V. I., Nikolaenko, A. A., Nozdrin, V. F., Obraztsov, A. G., Olshevsky, M., Ostrick, A., Padee, Pagano, Paolo, S., Panebianco, D., Panzieri, S., Paul, H. D., Pereira, D. V., Peshekhonov, V. D., Peshekhonov, G., Piragino, S., Platchkov, K., Platzer, J., Pochodzalla, V. A., Polyakov, A. A., Popov, J., Pretz, C., Quintan, S., Ramo, P. C., Rebourgeard, G., Reicherz, J., Reymann, K., Rith, A. M., Rojdestvenski, E., Rondio, A. B., Sadovski, E., Saller, V. D., Samoylenko, A., Sandacz, M. G., Sapozhnikov, IGOR A., Savin, Schiavon, Paolo, C., Schill, T., Schmidt, L., Schmitt, H., Schmitt, Shevchenko, O. Y. U., A. A., Shishkin, H., Siebert, L., Sinha, A. N., Sissakian, A., Skachkova, M., Slunecka, G. I., Smirnov, V. P., Sugonyaev, A., Srnka, F., Stinzing, M., Stolarski, M., Sulc, R., Sulej, N., Takabayashi, V. V., Tchalishev, D., Ther, F., Tessarotto, A., Teufel, L. G., Tkatchev, T., Toeda, V. I., Tretyak, S., Trousov, M., Varanda, M., Viriu, N. V., Vlassov, M., Wagner, T., Walcher, R., Webb, E., Weise, Q., Weitzel, M., Wiesmann, R., Windmolder, S., Wirth, W., Wislicki, A. M., Zanetti, K., Zaremba, J., Zhao, R., Ziegler, and A., Zvyagin
Subjects: Nuclear and High Energy Physics, Particle physics, media_common.quotation_subject, FOS: Physical sciences, Spin structure, 01 natural sciences, Asymmetry, COMPASS, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), deep inelastic scattering, structure function, 0103 physical sciences, COMPASS experiment, 010306 general physics, Nuclear Experiment, media_common, Spin-½, Physics, Large Hadron Collider, Muon, 010308 nuclear & particles physics, Deep inelastic scattering, DEEP INELASTIC-SCATTERING, structure functions, High Energy Physics::Experiment, Particle Physics - Experiment, Beam (structure)
Abstract: We present a new measurement of the longitudinal spin asymmetry A_1^d and the spin-dependent structure function g_1^d of the deuteron in the range 1 GeV^2 < Q^2 < 100 GeV^2 and 0.004< x, 10 pages, 6 figures, subm. to PLB, revised: author list, Fig. 4, details added
Published: 2005

31. The Two EROS 4k x 8k CCD Mosaic Cameras

Author: F. Bauer, J. De Kat, C. Afonso, E. Aubourg, S. Aune, P. Bareyre, A. Bouere, X. Charlot, C. Coutures, N. Delabrouille, G. Dispau, D. Eppelle, O. Gachelin, C. Gaucherel, J. F. Glicenstein, B. Goldman, M. Gros, D. Hardin, C. Jeanney, J. F. Lecointe, A. Le Coroller, E. Lesquoy, C. Magneville, A. Milsztajn, P. Perrin, M. Pinabiau, P. Rebourgeard, C. Renault, J. Rich, M. Spiro, R. Treillard, J. de Trogoff, N. Vignal, L. Vigroux, C. Walter, S. Zylberajch, J. N. Albert, R. Ansari, F. Couchot, C. Eder, O. Lodygensky, B. Mansoux, M. Moniez, O. Perdereau, G. Adrianzyk, J. P. Berger, J. C. Delclite, C. Figuiere, C. Guillaume, D. Kohler, D. Lacroix, A. Baranne, E. Maurice, J. P. Beaulieu, R. Ferlet, C. Loup, A. Vidal-Madjar, and J. Andersen
Subjects: Physics, Mosaic (geodemography), Remote sensing
Published: 1998
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32. Study of neutron damage resistance of some scintillating crystals and associated photodetectors with the nuclear reactor ULYSSE

Author: R. Chipaux, J.-L. Faure, J.-P. Pansart, J. Poinsignon, P. Rebourgeard, J. Tartas, France G. Dauphin, and J. Safieh
Subjects: Nuclear physics, Materials science, law, Scintillation counter, Photodetector, Neutron, Radiation, Nuclear reactor, Detectors and Experimental Techniques, Avalanche photodiode, Neutron temperature, Radiation resistance, law.invention
Abstract: Radiation resistance is a mandatory requirement for a major part of the active or passivecomponents of the particle detectors planned for the future high energy accelerator LHC.Ulysse is a training reactor of the Institut National des Sciences et Techniques Nucl éaires (INSTN), in Saclay, and a very suitable tool for testing materials and devicesfor these future large detectors. Its radiation spectrum characteristics are very similarto those expected in these detectors, in terms of spectra of fast neutrons, thermal neutrons and gamma photons, and ratios between those types of radiation.Results are presented on the neutron resistance of two scintillating crystals, candidatesfor electromagnetic calorimetry, cerium fluoride (CeF3) and lead tungstate (PbWO4), and on the behaviour under neutron irradiation of some avalanche photodiodes, currently under development for light detection of these crystals.
Published: 1994

33. A first electromagnetic calorimeter prototype of PbWO$_{4}$ crystals

Author: P. Rebourgeard, Remi Chipaux, J.P. Peigneux, O.V. Buyanov, V.V. Rykalin, P. A. Semenov, Petr P.M. Shagin, J.L. Faure, A.V. Singovsky, V. Yu. Khodyrev, M. Poulet, V.L. Solovianov, Mikhail Korzhik, A.A. Fyodorov, Vassili Kachanov, Yu.D. Prokoshkin, Laboratoire d'Annecy de Physique des Particules (LAPP), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Resolution (electron density), Electron, 01 natural sciences, Matrix (mathematics), Electromagnetic calorimeter, Optics, Electromagnetic calorimetry, 0103 physical sciences, Radiation damage, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, 010306 general physics, business, Instrumentation, Beam (structure)
Abstract: The main properties of PbWO4 crystals have been measured. They are of particular interest for electromagnetic calorimetry. Beam tests of 21-cells matrix prototype are reported. An energy resolution better than 1% has been achieved for electrons energies larger than 25 GeV.
Published: 1994

34. Further results on cerium fluoride crystals

Author: Etiennette Auffray, H. Hillemanns, Y. Lemoigne, Bernard Ille, S. P. Stoll, M. Chemarin, B. Dezillie, Ioan Dafinei, W. Krenz, G. J. Mauger, S. N. Ganguli, P. Rebourgeard, Marvin J. Weber, J. P. Pansart, P. Lebrun, D. Ferrere, V. Samsonov, H. El Mamouni, Jean-Louis Faure, M. Goyot, P.D. D'Atanasio, D.W. Schmitz, Christophe Dujardin, J.A. Mares, D. Seliverstov, J. M. Le Goff, J. P. Martin, Subir Sarkar, Remi Chipaux, L. E. Barone, G. Gillespie, Paul Lecoq, S. Anderson, P. Bareyre, André Rosowsky, Leif J. Jönsson, S. Mangla, Oriano Francescangeli, Alain Hervé, J. Heck, Bernard Moine, Tariq Aziz, C. L. Woody, K. Lübelsmeyer, Paolo Mengucci, Stefania Baccaro, Suchandra Dutta, M. Schneegans, A. Gurtu, W. Kway, B. Borgia, C. Pedrini, J. Poinsignon, J. Rosa, F. de Notaristefani, Jean Fay, M. Lebeau, Craig R. Wuest, Daniele Rinaldi, F. Holdener, A. Svensson, J. P. Burq, Mario Mattioli, Jean-Pierre Merlo, Kajari Mazumdar, D. Boutet, P. Sahuc, K. Sudhakar, S. C. Tonwar, V. Topa, V. Schegelski, Guiseppe Majni, V. Yanovski, N. Madjar, J.P. Vialle, W. Wallraff, S. Banerjee, N. Winter, J. Kierstead, N. Nikl, M. Vivargent, B. A. Fuchs, G. Loomis, S. K. Gupta, R. Raghavan, K. Polak, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), and CPLEAR
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Photon radiation, Inorganic chemistry, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, 3. Good health, Cerium fluoride, 0103 physical sciences, Radiation damage, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Detectors and Experimental Techniques, 0210 nano-technology, Instrumentation
Abstract: A systematic investigation of the properties of cerium fluoride monocrystals has been performed by the “Crystal Clear” collaboration in view of a p
Published: 1993

35. A simple method for measuring the performance of plastic scintillating materials

Author: H. Blumenfeld, P. Rebourgeard, and M. Bourdinaud
Subjects: Physics, Nuclear and High Energy Physics, Scintillation, Fabrication, Physics::Instrumentation and Detectors, business.industry, Alpha particle, Scintillator, Core (optical fiber), Optics, Nuclear Energy and Engineering, Scintillation counter, Ultraviolet light, Optoelectronics, Electrical and Electronic Engineering, Ternary operation, business
Abstract: The authors propose a method to measure the relative efficiency of scintillating materials based on the fabrication of thin films (10 to 100 mu m) with at least one of the faces roughened. Excitation with a monochromatic beam of ultraviolet light then permits a thorough study of the energy transfer in plastic scintillators and their spectral emission and a comparison of their intrinsic scintillation intensity. The results obtained are reproducible and in satisfactory agreement with direct measurements with alpha radiation. It is shown that the standard ternary scintillator PS+1%butylPBD+dimethylPOPOP cannot be used for the core of a plastic scintillating fiber (PSF) with a diameter smaller then 0.4 mm. Instead, a binary solution, PS+0.6%PBBO, has been studied which makes it possible to consider the production of PSF with a diameter less than 50 mu m, with acceptable crosstalk and good efficiency. >
Published: 1989
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36. New developments of Micromegas detector

Author: Delbart, A., Oliveira, R. D., Derre, J., Giomataris, Y., Jeanneau, F., Papadopoulos, Y., and Rebourgeard, P.
Published: 2001
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37. Fast signals and single electron detection with a MICROMEGAS photodetector

Author: Derre, J., Giomataris, Y., Rebourgeard, P., Zaccone, H., Perroud, J. P., and Charpak, G.
Published: 2000
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38. The micromegas detector as a high flux and a high resolution tracker for the COMPASS experiment at CERN

Author: Thers, D., Abbon, Ph., Ball, J., Durand, R., Faivre, J.C., Giganon, A., Le Goff, J.M., Kunne, F., Lehar, F., Magnon, A., Neyret, D., Platchkov, S., Poisson, E., Rebourgeard, Ph., and Robert, J.P.
Published: 1999
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39. Fabrication and measurements of plastic scintillating fibers

Author: Rebourgeard, P.P., Rondeaux, F., Baton, J.P., Besnard, G., Blumenfeld, H., Bourdinaud, M., Calvet, J., Cavan, J.-C., Chipaux, R., and Giganon, A.
Published: 1999
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40. First beam test results with Micromegas, a high-rate, high-resolution detector

Author: Charpak, G., Derre, J., Giganon, A., Giomataris, Y., Jourde, D., Kochowski, C., Loucatos, S., Puill, G., Rebourgeard, Ph., and Robert, J. P.
Published: 1998
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41. A simple method for measuring the performance of plastic scintillating materials

Author: Rebourgeard, P., Blumenfeld, H., and Bourdinaud, M.
Abstract: The authors propose a method to measure the relative efficiency of scintillating materials based on the fabrication of thin films (10 to 100 mu m) with at least one of the faces roughened. Excitation with a monochromatic beam of ultraviolet light then permits a thorough study of the energy transfer in plastic scintillators and their spectral emission and a comparison of their intrinsic scintillation intensity. The results obtained are reproducible and in satisfactory agreement with direct measurements with alpha radiation. It is shown that the standard ternary scintillator PS+1%butylPBD+dimethylPOPOP cannot be used for the core of a plastic scintillating fiber (PSF) with a diameter smaller then 0.4 mm. Instead, a binary solution, PS+0.6%PBBO, has been studied which makes it possible to consider the production of PSF with a diameter less than 50 mu m, with acceptable crosstalk and good efficiency.<>
Published: 1989
Full Text: View/download PDF

42. MICROMEGAS: a high-granularity position-sensitive gaseous detector for high particle-flux environments

Author: Giomataris, Y., Rebourgeard, P., Robert, J. P., and Charpak, G.
Published: 1996
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43. A large size MICROMEGAS detector for the COMPASS experiment at CERN

Author: P. Rebourgeard, F. Kunne, Ph. Abbon, E. Delagnes, A. Giganon, J. Ball, C. Bernet, Y. Bedfer, H. Pereira, C. Marchand, S. Platchkov, J. M. Le Goff, D. Neyret, A. Magnon, and D. Thers
Subjects: Physics, Nuclear physics, Large Hadron Collider, Physics::Instrumentation and Detectors, Nuclear electronics, Compass, Detector, COMPASS experiment, High Energy Physics::Experiment, MicroMegas detector, Noise figure, Large size
Abstract: We have developed and built 12 planes of large-size (40/spl times/40 cm/sup 2/) MICROMEGAS detectors. These detectors were installed at CERN and successfully operated during the first year of the COMPASS data taking. All important detector parameters: space and time resolutions, discharge probabilities, noise figure and experimental efficiencies were found to agree with the design values.

44. Studies for a fast rich

Author: P. ABBON, M. ALEKSEEV, H. ANGERER, M. APOLLONIO, R. BIRSA, P. BORDALO, F. BRADAMANTE, A. BRESSAN, L. BUSSO, M. CHIOSSO, P. CILIBERTI, M. L. COLANTONI, S. COSTA, S. DALLA TORRE, H. DESCHAMPS, V. DIAZ, N. DIBIASE, V. DUIC, W. EYRICH, D. FASO, A. FERRERO, M. FINGER, H. FISCHER, S. GERASSIMOV, M. GIORGI, B. GOBBO, D. VON HARRACH, F. H. HEINSIUS, S. HORIKAWA, R. JOOSTEN, B. KETZER, K. KOENIGSMANN, V. N. KOLOSOV, I. KONOROV, D. KRAMER, F. KUNNE, A. LEHMAN, A. MAGGIORA, A. MAGNON, A. MARTIN, G. MENON, A. MUTTER, O. NAEHLE, D. NEYRET, F. NERLING, P. PAGANO, S. PANEBIANCO, D. PANZIERI, S. PAUL, J. POLAK, P. REBOURGEARD, P. SCHIAVON, C. SCHILL, W. SCHROEDER, L. SILVA, M. SLUNECKA, F. SOZZI, L. STEIGER, M. SULC, F. TESSAROTTO, and A. TEUFEL

45. Fast photon-detection for COMPASS RICH-1

Author: P. Abbon, M. Alexeev, H. Angerer, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, M. Chiosso, P. Ciliberti, M. L. Colantoni, T. Dafni, S. Dalla Torre, E. Delagnes, O. Denisov, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, A. Ferrero, M. Finger, H. Fisher, S. Gerassimov, M. Giorgi, B. Gobbo, R. Hagemann, D. vonHarrac, F. H. Heinsius, R. Joosten, B. Ketzer, K. Königsmann, V. N. Kolosov, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, D. Neyret, F. Nerling, S. Panebianco, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, F. Robinet, E. Rocco, P. Schiavon, C. Schill, W. Schoenmeier, W. Schröder, L. Silva, M. Sluneckai, F. Sozzi, L. Steiger, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, and H. Wollny
Subjects: Physics, Optics, business.industry, Compass, business, Photon detection, Particle identification

46. Behaviour of CeF~3 scintillator in an LHC-like environment

Author: Chipaux, R., Faure, J.-L., Rebourgeard, P., and Dauphin, G.
Published: 1994
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47. Hartmann test of the COMPASS RICH-1 optical telescopes

Author: Abbon, P., Alekseev, M., Angerer, H., Apollonio, M., Birsa, R., Bordalo, P., Bradamante, F., Andrea Bressan, Busso, L., Chiosso, V. M., Ciliberti, P., Colantoni, M. L., Costa, S., Dibiase, N., Dafni, T., Torre, S. Dalla, Diaz, V., Duic, V., Delagnes, E., Deschamps, H., Eyrich, W., Faso, D., Ferrero, A., Finger, M., Fischer, H., Gerassimov, S., Giorgi, M., Gobbo, B., Hagemann, R., Harrach, D., Heinsius, F. H., Joosten, R., Ketzer, B., Koenigsmann, K., Kolosov, V. N., Konorov, I., Kramer, D., Kunne, F., Levorato, S., Maggiora, A., Magnon, A., Mann, A., Martin, A., Menon, G., Mutter, A., Naehle, O., Neyret, D., Nerling, F., Pagano, P., Paul, S., Panebianco, S., Panzieri, D., Pesaro, G., Pizzolotto, C., Polak, J., Rebourgeard, P., Rocco, E., Robinet, F., Schiavon, P., Schill, C., Schoenmeier, P., Silva, L., Slunecka, M., Steiger, L., Sozzi, F., Sulc, M., Svec, M., Tessarotto, F., Teufel, A., Wollny, H., P., Abbon, T., Dafni, E., Delagne, H., Deschamp, F., Kunne, A., Magnon, D., Neyret, S., Panebianco, P., Rebourgeard, F., Robinet, M., Alekseev, L., Busso, M., Chiosso, S., Costa, N., Dibiase, D., Faso, A., Ferrero, A., Maggiora, H., Angerer, S., Gerasimov, B., Ketzer, I., Konorov, A., Mann, S., Paul, M., Apollonio, R., Birsa, F., Bradamante, Bressan, Andrea, Ciliberti, Piero, S., DALLA TORRE, V., Diaz, V., Duic, M., Giorgi, B., Gobbo, Levorato, Stefano, Martin, Anna, G., Menon, P., Pagano, G., Pesaro, E., Rocco, Schiavon, Paolo, F., Sozzi, F., Tessarotto, P., Bordalo, L., Silva, M. L., Colantoni, D., Panzieri, W., Eyrich, C., Pizzolotto, P., Schonmeier, A., Teufel, M., Finger, M., Slunecka, H., Fischer, R., Hagemann, F. H., Heinsiu, K., Konigsmann, A., Mutter, F., Nerling, C., Schill, H., Wollny, D., VON HARRACH, R., Joosten, O., Nahle, V. N., Kolosov, D., Kramer, J., Polak, L., Steiger, M., Sulc, and M., Svec
Subjects: UV lenses, Hartmann test, Particle Physics - Experiment, COMPASS RICH1
Abstract: The central region of COMPASS RICH-1 has been equipped with a new photon detection system based on MultiAnode PhotoMultiplier Tubes (MAPMT). The Cherenkov photons are focused by an array of 576 fused silica telescopes onto 576 MAPMTs. The quality and positioning of all optical components have been tested by Hartmann method. The validation procedures are described. The quality of the optical concentrators was checked and alignment corrections were made. The upgraded detector showed excellent performances during 2006 data taking.

48. Fast photon detection for COMPASS RICH-1

Author: Abbon, P., Dafni, T., Delagnes, E., Deschamps, H., Kunne, F., Magnon, A., Neyret, D., Panebianco, S., Rebourgeard, P., Robinet, F., Alekseev, M., Busso, L., Chiosso, M., Costa, S., Di Biase, N., Faso, D., Ferrero, A., Maggiora, A., Angerer, H., Gerasimov, S., Ketzer, B., Konorov, I., Mann, A., Stephan Paul, Apollonio, M., Birsa, R., Bradamante, F., Bressan, A., Ciliberti, P., Dalla Torre, S., Diaz, V., Duic, V., Giorgi, M., Gobbo, B., Levorato, S., Martin, A., Menon, G., Pagano, P., Pesaro, G., Rocco, E., Schiavon, P., Sozzi, F., Tessarotto, F., Bordalo, P., Silva, L., Colantoni, M. L., Panzieri, D., Eyrich, W., Pizzolotto, C., Schonmeier, P., Teufel, A., Finger, M., Slunecka, M., Fischer, H., Hagemann, R., Heinsius, F. H., Konigsmann, Kay, Mutter, A., Nerling, F., Schill, C., Wollny, H., Harrach, D., Joosten, R., Nahle, O., Kolosov, V. N., Kramer, D., Polak, J., Steiger, L., Sulc, M., Svec, M., P., Abbon, T., Dafni, E., Delagne, H., Deschamp, F., Kunne, A., Magnon, D., Neyret, S., Panebianco, P., Rebourgeard, F., Robinet, M., Alekseev, L., Busso, M., Chiosso, S., Costa, N., DI BIASE, D., Faso, A., Ferrero, A., Maggiora, H., Angerer, S., Gerasimov, B., Ketzer, I., Konorov, A., Mann, S., Paul, M., Apollonio, R., Birsa, F., Bradamante, Bressan, Andrea, Ciliberti, Piero, S., DALLA TORRE, V., Diaz, V., Duic, M., Giorgi, B., Gobbo, Levorato, Stefano, Martin, Anna, G., Menon, P., Pagano, G., Pesaro, E., Rocco, Schiavon, Paolo, F., Sozzi, F., Tessarotto, P., Bordalo, L., Silva, M. L., Colantoni, D., Panzieri, W., Eyrich, C., Pizzolotto, P., Schonmeier, A., Teufel, M., Finger, M., Slunecka, H., Fischer, R., Hagemann, F. H., Heinsiu, K., Konigsmann, A., Mutter, F., Nerling, C., Schill, H., Wollny, D., VON HARRACH, R., Joosten, O., Nahle, V. N., Kolosov, D., Kramer, J., Polak, L., Steiger, M., Sulc, and M., Svec
Subjects: Multi-anode PMT, COMPASS RICH1, fused silica lens telescopes, Particle Physics - Experiment
Abstract: The new photon detection system for COMPASS RICH-1 has been designed to cope with the demanding requests of operation at high beam intensity and at high trigger rates. The detection technique in the central region of RICH-1 has been changed with a system based on multianode photomultipliers coupled to individual fused silica lens telescopes and to a fast, almost dead time free readout system based on the MAD-4 amplifier-discriminator and the F1 TDC-chip. The new photon detection system design and construction are described, as well as its first response in the experiment.

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