Emulsion sheet doublets as interface trackers for the OPERA experiment

doi:10.1088/1748-0221/3/07/P07005

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Journal of Instrumentation

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Journal of Instrumentation Volume 3 July 2008 Create an alert RSS this journal

A Anokhina et al 2008 JINST 3 P07005 doi:10.1088/1748-0221/3/07/P07005

Emulsion sheet doublets as interface trackers for the OPERA experiment

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A Anokhina²³, S Aoki¹⁷, A Ariga²⁵, L Arrabito¹⁹, D Autiero¹⁹, A Badertscher³⁸, F Bay¹, F Bersani Greggio³⁵, A Bertolin³⁰, M Besnier², D Bick¹⁴, C Bozza³³, T Brugiere¹⁹, R Brugnera³¹, G Brunetti⁸, S Buontempo²⁶, E Carrara³¹, A Cazes¹¹, L Chaussard¹⁹, M Chernyavsky²², V Chiarella¹¹, N Chon-Sen³⁴, A Chukanov²⁶, L Consiglio⁸, M Cozzi⁸, V Cuha¹, F Dal Corso³⁰, G D'Amato³³, N D'Ambrosio³, G De Lellis²⁷, Y Déclais¹⁹, M De Serio⁵, F Di Capua²⁶, D Di Ferdinando⁷, A Di Giovanni¹⁸, N Di Marco¹⁸, C Di Troia¹¹, S Dmitrievski¹⁰, A Dominjon¹⁹, M Dracos³⁴, D Duchesneau², S Dusini³⁰, J Ebert¹⁴, O Egorov²¹, R Enikeev²⁰, A Ereditato⁶, L S Esposito³, J Favier², G Felici¹¹, T Ferber¹⁴, R Fini⁵, D Frekers²⁴, T Fukuda²⁵, V I Galkin²³, V A Galkin²⁹, A Garfagnini³¹, G Giacomelli⁸, M Giorgini⁸, C Goellnitz¹⁴, J Goldberg¹³, D Golubkov²¹, Y Gornushkin¹⁰, G Grella³³, F Grianti³⁵, M Guler¹, G Gusev²², C Gustavino³, C Hagner¹⁴, T Hara¹⁷, M Hierholzer¹⁴, S Hiramatsu²⁵, K Hoshino²⁵, M Ieva⁵, K Jakovcic³⁷, J Janicsko Csathy²⁸, B Janutta¹⁴, C Jollet³⁴, F Juget²⁸, T Kawai²⁵, M Kazuyama²⁵, S H Kim¹⁵, J Knuesel⁶, K Kodama¹⁶, M Komatsu²⁵, U Kose¹, I Kreslo⁶, I Laktineh¹⁹, C Lazzaro³⁸, J Lenkeit¹⁴, A Ljubicic³⁷, A Longhin³⁰, G Lutter²⁸, K Manai¹⁹, G Mandrioli⁷, A Marotta²⁶, J Marteau¹⁹, T Matsuo¹², H Matsuoka²⁵, N Mauri⁸, F Meisel²⁸, A Meregaglia³⁴, M Messina⁶, P Migliozzi²⁶, S Mikado¹², S Miyamoto²⁵, P Monacelli¹⁸, K Morishima²⁵, U Moser⁶, M T Muciaccia⁴, N Naganawa²⁵, T Naka²⁵, M Nakamura²⁵, T Nakamura²⁵, T Nakano²⁵, V Nikitina²³, K Niwa²⁵, Y Nonoyama²⁵, S Ogawa¹², V Osedlo²³, D Ossetski²⁹, A Paoloni¹¹, B D Park¹⁵, I G Park¹⁵, A Pastore⁴, L Patrizii⁷, E Pennacchio¹⁹, H Pessard², V Pilipenko²⁴, C Pistillo⁶, N Polukhina²², M Pozzato⁸, K Pretzl⁶, P Publichenko²³, F Pupilli¹⁸, T Roganova²³, G Rosa³², I Rostovtseva²¹, A Rubbia³⁸, A Russo²⁶, O Ryazhskaya²⁰, D Ryzhikov²⁹, O Sato²⁵, Y Sato³⁸, V Saveliev²⁹, G Sazhina²³, A Schembri³, L Scotto Lavina²⁶, H Shibuya¹², S Simone⁴, M Sioli⁸, C Sirignano³³, G Sirri⁷, J S Song¹⁵, M Spinetti¹¹, L Stanco³⁰, N Starkov²², M Stipcevic³⁷, T Strauss³⁸, P Strolin²⁷, V Sugonyaev³⁰, Y Taira²⁵, S Takahashi²⁵, M Tenti⁸, F Terranova¹¹, I Tezuka³⁸, V Tioukov²⁶, P Tolun¹, V Tsarev²², S Tufanli¹, N Ushida¹⁶, P Vilain⁹, M Vladimirov²², L Votano¹¹, J L Vuilleumier²⁸, G Wilquet⁹, B Wonsak¹⁴, C S Yoon¹⁵, J Yoshida²⁵, Y Zaitsev²¹, S Zemskova¹⁰, A Zghiche² and R Zimmermann¹⁴

Show affiliations

ariga@flab.phys.nagoya-u.ac.jp

¹ METU-Middle East Technical University, TR-06531 Ankara, Turkey
² LAPP, Université de Savoie, CNRS/IN2P3, 74941 Annecy-le-Vieux, France
³ Laboratori Nazionali del Gran Sasso dell'INFN, 67010 Assergi (L'Aquila), Italy
⁴ Dipartimento di Fisica dell'Università di Bari and INFN, 70126 Bari, Italy
⁵ INFN Sezione di Bari, 70126 Bari, Italy
⁶ University of Bern, CH-3012 Bern, Switzerland
⁷ INFN Sezione di Bologna, I-40127 Bologna, Italy
⁸ Dipartimento di Fisica dell'Università di Bologna and INFN, I-40127 Bologna, Italy
⁹ IIHE-Inter-University Institute for High Energies, Université Libre de Bruxelles, B-1050 Brussels, Belgium
¹⁰ JINR-Joint Institute for Nuclear Research, 141980 Dubna, Russia
¹¹ Laboratori Nazionali di Frascati dell'INFN, 00044 Frascati (Roma), Italy
¹² Toho University, 274-8510 Funabashi, Japan
¹³ Department of Physics, Technion, 32000 Haifa, Israel
¹⁴ Hamburg University, 22043 Hamburg, Germany
¹⁵ Gyeongsang National University, 900 Gazwa-dong, Jinju 660-300, Korea
¹⁶ Aichi University of Education, 448 Kariya (Aichi-Ken), Japan
¹⁷ Kobe University, 657 Kobe, Japan
¹⁸ Dipartimento di Fisica dell'Università dell'Aquila and INFN, Gr. Coll. L'Aquila, Italy
¹⁹ IPNL, Université Claude Bernard Lyon 1, CNRS/IN2P3, 69622 Villeurbanne, France
²⁰ INR-Institute for Nuclear Research of the Russian Academy of Sciences, 117312 Moscow, Russia
²¹ ITEP-Institute for Theoretical and Experimental Physics, 117259 Moscow, Russia
²² LPI-Lebedev Physical Institute of the Russian Academy of Sciences, 117924 Moscow, Russia
²³ SINP MSU-Skobeltsyn Institute of Nuclear Physics of Moscow State University, 119992 Moscow, Russia
²⁴ University of Münster, 48149 Münster, Germany
²⁵ Nagoya University, 464-01 Nagoya, Japan
²⁶ INFN Sezione di Napoli, 80125 Napoli, Italy
²⁷ Dipartimento di Fisica dell'Università Federico II di Napoli and INFN, 80125 Napoli, Italy
²⁸ Université de Neuchâtel, CH 2000 Neuchâtel, Switzerland
²⁹ Obninsk State University, Institute of Nuclear Power Engineering, 249020 Obninsk, Russia
³⁰ INFN Sezione di Padova, 35131 Padova, Italy
³¹ Dipartimento di Fisica dell'Università di Padova and INFN, 35131 Padova, Italy
³² Dipartimento di Fisica dell'Università di Roma ''La Sapienza'' and INFN, 00185 Roma, Italy
³³ Dipartimento di Fisica dell'Università di Salerno and INFN, 84084 Fisciano, Salerno, Italy
³⁴ IPHC, Université Louis Pasteur, CNRS/IN2P3, 67037 Strasbourg, France
³⁵ CSAAE - Università di Urbino and Laboratori Nazionali di Frascati dell'INFN
³⁶ Utsunomiya University, 321-8505 Utsunomiya, Japan
³⁷ IRB-Rudjer Boskovic Institute, 10002 Zagreb, Croatia
³⁸ ETH-Eidgenössische Technische Hochschulen Zürich, CH-8092 Zurich, Switzerland

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Abstract References Cited By

New methods for efficient and unambiguous interconnection between electronic position sensitive detectors and target units based on nuclear photographic emulsion films have been developed. The application to the OPERA experiment, that aims at detecting ν_μ rightleftharpoons

ν_τ oscillations 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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