CERN Accelerating science

Article
Report number arXiv:0804.1985
Title Emulsion sheet doublets as interface trackers for the OPERA experiment
Author(s)

Anokhina, A. (SINP, Moscow) ; Aoki, S. (Kobe U.) ; Ariga, A. (Nagoya U.) ; Arrabito, L. (Lyon, IPN) ; Autiero, D. (Lyon, IPN) ; Badertscher, A. (Zurich, ETH) ; Bay, F. (Middle East Tech. U., Ankara) ; Greggio, F.Bersani (Urbino U. ; Frascati) ; Bertolin, A. (INFN, Padua) ; Besnier, M. (Annecy, LAPP) ; Bick, D. (Hamburg U.) ; Bozza, C. (INFN, Salerno) ; Brugiere, T. (Lyon, IPN) ; Brugnera, R. (INFN, Padua) ; Brunetti, G. (INFN, Bologna) ; Buontempo, S. (INFN, Naples) ; Carrara, E. (INFN, Padua) ; Cazes, A. (Frascati) ; Chaussard, L. (Lyon, IPN) ; Chernyavsky, M. (Lebedev Inst.) ; Chiarella, V. (Frascati) ; Chon-Sen, N. (Louis Pasteur U., Strasbourg I) ; Chukanov, A. (INFN, Naples) ; Consiglio, L. (INFN, Bologna) ; Cozzi, M. (INFN, Bologna) ; Cuha, V. (Middle East Tech. U., Ankara) ; Dal Corso, F. (INFN, Padua) ; D'Amato, G. (INFN, Salerno) ; D'Ambrosio, N. (INFN, Aquila) ; De Lellis, G. (INFN, Naples) ; Declais, Y. (Lyon, IPN) ; De Serio, M. (INFN, Bari) ; Di Capua, F. (INFN, Naples) ; Di Ferdinando, D. (INFN, Bologna) ; Di Giovanni, A. (INFN, Aquila) ; Di Marco, N. (INFN, Aquila) ; Di Troia, C. (Frascati) ; Dmitrievski, S. (Dubna, JINR) ; Dominjon, A. (Lyon, IPN) ; Dracos, Marcos (Louis Pasteur U., Strasbourg I) ; Duchesneau, D. (Annecy, LAPP) ; Dusini, S. (INFN, Padua) ; Ebert, J. (Hamburg U.) ; Egorov, O. (Moscow, ITEP) ; Enikeev, R. (Moscow, INR) ; Ereditato, Antonio (Bern U.) ; Esposito, L.S. (INFN, Aquila) ; Favier, J. (Annecy, LAPP) ; Felici, G. (Frascati) ; Ferber, T. (Hamburg U.) ; Fini, R. (INFN, Bari) ; Frekers, D. (Munster U.) ; Fukuda, T. (Nagoya U.) ; Galkin, V.I. (SINP, Moscow) ; Galkin, V.A. (Obninsk, Inst. Phys. Power Eng.) ; Garfagnini, A. (INFN, Padua) ; Giacomelli, G. (INFN, Bologna) ; Giorgini, M. (INFN, Bologna) ; Goellnitz, C. (Hamburg U.) ; Goldberg, J. (Technion) ; Golubkov, D. (Moscow, ITEP) ; Gornushkin, Y. (Dubna, JINR) ; Grella, G. (INFN, Salerno) ; Grianti, F. (Urbino U. ; Frascati) ; Guler, M. (Middle East Tech. U., Ankara) ; Gusev, G. (Lebedev Inst.) ; Gustavino, C. (INFN, Aquila) ; Hagner, Caren (Hamburg U.) ; Hara, T. (Kobe U.) ; Hierholzer, M. (Hamburg U.) ; Hiramatsu, S. (Nagoya U.) ; Hoshino, Kaoru (Nagoya U.) ; Ieva, M. (INFN, Bari) ; Jakovcic, K. (Boskovic Inst., Zagreb) ; Janicsko Csathy, J. (Neuchatel U.) ; Janutta, B. (Hamburg U.) ; Jollet, C. (Louis Pasteur U., Strasbourg I) ; Juget, F. (Neuchatel U.) ; Kawai, T. (Nagoya U.) ; Kazuyama, M. (Nagoya U.) ; Kim, S.H. (Nagoya U.) ; Knuesel, J. (Bern U.) ; Kodama, K. (Aichi U.) ; Komatsu, M. (Nagoya U.) ; Kose, U. (Middle East Tech. U., Ankara) ; Kreslo, I. (Bern U.) ; Laktineh, I. (Lyon, IPN) ; Lazzaro, C. (Zurich, ETH) ; Lenkeit, J. (Hamburg U.) ; Ljubicic, A. (Boskovic Inst., Zagreb) ; Longhin, Andrea (INFN, Padua) ; Lutter, G. (Neuchatel U.) ; Manai, K. (Lyon, IPN) ; Mandrioli, G. (INFN, Bologna) ; Marotta, A. (INFN, Naples) ; Marteau, J. (Lyon, IPN) ; Matsuo, T. (Toho U.) ; Matsuoka, H. (Nagoya U.) ; Mauri, N. (INFN, Bologna) ; Meisel, F. (Neuchatel U.) ; Meregaglia, A. (Louis Pasteur U., Strasbourg I) ; Messina, M. (Bern U.) ; Migliozzi, P. (INFN, Naples) ; Mikado, S. (INFN, Naples) ; Miyamoto, S. (Nagoya U.) ; Monacelli, Piero (INFN, Aquila) ; Morishima, Kunihiro (Nagoya U.) ; Moser, U. (Bern U.) ; Muciaccia, Maria Teresa (INFN, Bari) ; Naganawa, N. (Nagoya U.) ; Naka, T. (Nagoya U.) ; Nakamura, M. (Nagoya U.) ; Nakamura, T. (Nagoya U.) ; Nakano, T. (Nagoya U.) ; Nikitina, V. (SINP, Moscow) ; Niwa, K. (Nagoya U.) ; Nonoyama, Y. (Nagoya U.) ; Ogawa, S. (Toho U.) ; Osedlo, V. (SINP, Moscow) ; Ossetski, D. (Obninsk, Inst. Phys. Power Eng.) ; Paoloni, A. (Frascati) ; Park, B.D. (Gyeongsang Natl. U.) ; Park, I.G. (Gyeongsang Natl. U.) ; Pastore, A. (INFN, Bari) ; Patrizii, L. (INFN, Bologna) ; Pennacchio, E. (Lyon, IPN) ; Pessard, H. (Annecy, LAPP) ; Pilipenko, V. (Munster U.) ; Pistillo, C. (Bern U.) ; Polukhina, N. (Lebedev Inst.) ; Pozzato, M. (INFN, Bologna) ; Pretzl, Klaus P. (Bern U.) ; Publichenko, P. (SINP, Moscow) ; Pupilli, F. (INFN, Aquila) ; Roganova, T. (SINP, Moscow) ; Rosa, G. (INFN, Rome) ; Rostovtseva, I. (Moscow, ITEP) ; Rubbia, A. (Zurich, ETH) ; Russo, A. (INFN, Naples) ; Ryazhskaya, O. (Moscow, INR) ; Ryzhikov, D. (Obninsk, Inst. Phys. Power Eng.) ; Sato, O. (Nagoya U.) ; Sato, Y. (Utsunomiya U.) ; Saveliev, V. (Obninsk, Inst. Phys. Power Eng.) ; Sazhina, G. (SINP, Moscow) ; Schembri, A. (INFN, Aquila) ; Scotto Lavina, L. (INFN, Naples) ; Shibuya, H. (Toho U.) ; Simone, S. (INFN, Bari) ; Sioli, Max (INFN, Bologna) ; Sirignano, C. (INFN, Salerno) ; Sirri, G. (INFN, Bologna) ; Song, J.S. (Gyeongsang Natl. U.) ; Spinetti, M. (Frascati) ; Stanco, L. (INFN, Padua) ; Starkov, N. (Lebedev Inst.) ; Stipcevic, M. (Boskovic Inst., Zagreb) ; Strauss, T. (Zurich, ETH) ; Strolin, Paolo Emilio (INFN, Naples) ; Sugonyaev, V. (INFN, Padua) ; Taira, Y. (Nagoya U.) ; Takahashi, S. (Nagoya U.) ; Tenti, M. (INFN, Bologna) ; Terranova, F. (Frascati) ; Tezuka, I. (Utsunomiya U.) ; Tioukov, V. (INFN, Naples) ; Tolun, P. (Middle East Tech. U., Ankara) ; Tsarev, V. (Lebedev Inst.) ; Tufanli, S. (Middle East Tech. U., Ankara) ; Ushida, N. (Aichi U.) ; Vilain, P. (Lebedev Inst.) ; Vladimirov, M. (Lebedev Inst.) ; Votano, L. (Frascati) ; Vuilleumier, J.L. (Neuchatel U.) ; Wilquet, G. (Hamburg U.) ; Wonsak, B. (Hamburg U.) ; Wurtz, J. (Louis Pasteur U., Strasbourg I) ; Yoon, C.S. (Gyeongsang Natl. U.) ; Yoshida, J. (Nagoya U.) ; Zaitsev, Y. (Moscow, ITEP) ; Zemskova, S. (Dubna, JINR) ; Zghiche, Amina (Annecy, LAPP) ; Zimmermann, R. (Hamburg U.)

Publication 2008
Imprint 15 Apr 2008
Number of pages 20
Note 19 pages, 19 figures
In: JINST 3 (2008) P07005
DOI 10.1088/1748-0221/3/07/P07005
Subject category Detectors and Experimental Techniques ; Detectors and Experimental Techniques
Accelerator/Facility, Experiment CERN SPS ; OPERA CNGS1
Abstract New methods for efficient and unambiguous interconnection between electronic counters and target units based on nuclear photographic emulsion films have been developed. The application to the OPERA experiment, that aims at detecting oscillations between mu neutrino and tau neutrino in the CNGS neutrino beam, is reported in this paper. In order to reduce background due to latent tracks collected before installation in the detector, on-site large-scale treatments of the emulsions ("refreshing") have been applied. Changeable Sheet (CSd) packages, each made of a doublet of emulsion films, have been designed, assembled and coupled to the OPERA target units ("ECC bricks"). A device has been built to print X-ray spots for accurate interconnection both within the CSd and between the CSd and the related ECC brick. Sample emulsion films have been extensively scanned with state-of-the-art automated optical microscopes. Efficient track-matching and powerful background rejection have been achieved in tests with electronically tagged penetrating muons. Further improvement of in-doublet film alignment was obtained by matching the pattern of low-energy electron tracks. The commissioning of the overall OPERA alignment procedure is in progress.
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