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André Rubbia, ETH Zürich

Background leading to the requirements for a study. André Rubbia, ETH Zürich. January, 2004. The ICARUS project. The ICARUS collaboration (25 institutes, ≈150 physicists).

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André Rubbia, ETH Zürich

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  1. Background leading to the requirements for a study André Rubbia, ETH Zürich January, 2004

  2. The ICARUS project

  3. The ICARUS collaboration(25 institutes, ≈150 physicists) M. Aguilar-Benitez, S. Amoruso, Yu. Andreew, P. Aprili, F. Arneodo, B. Babussinov, B. Badelek, A. Badertscher, M. Baldo-Ceolin, G. Battistoni, B. Bekman, P. Benetti, E. Bernardini, A. Borio di Tigliole, M. Bischofberger, R. Brunetti, R. Bruzzese, A. Bueno, C. Burgos, E. Calligarich, D. Cavalli, F. Cavanna, F. Carbonara, P. Cennini, S. Centro, M. Cerrada, A. Cesana, R. Chandrasekharan, C. Chen, D. B. Chen, Y. Chen, R. Cid, D. Cline, P. Crivelli, A.G. Cocco, A. Dabrowska, Z. Dai, M. Daniel, M. Daszkiewicz, C. De Vecchi, A. Di Cicco, R. Dolfini, A. Ereditato, M. Felcini, A. Ferrari, F. Ferri, G. Fiorillo, M.C. Fouz, S. Galli, D. Garcia, Y. Ge, D. Gibin, A. Gigli Berzolari, I. Gil-Botella, S.N. Gninenko, N. Goloubev, A. Guglielmi, K. Graczyk, L. Grandi, K. He, J. Holeczek, X. Huang, C. Juszczak, D. Kielczewska, M. Kirsanov, J. Kisiel, L. Knecht, T. Kozlowski, H. Kuna-Ciskal, N. Krasnikov, P. Ladron de Guevara, M. Laffranchi, J. Lagoda, Z. Li, B. Lisowski, F. Lu, J. Ma, N. Makrouchina, G. Mangano, G. Mannocchi, M. Markiewicz, A. Martinez de la Osa, V. Matveev, C. Matthey, F. Mauri, D. Mazza, A. Melgarejo, G. Meng, A. Meregaglia, M. Messina, C. Montanari, S. Muraro, G. Natterer, S. Navas-Concha, M. Nicoletto, G. Nurzia, C. Osuna, S. Otwinowski, Q. Ouyang, O. Palamara, D. Pascoli, L. Periale, G. Piano Mortari, A. Piazzoli, P. Picchi, F. Pietropaolo, W. Polchlopek, T. Rancati, A. Rappoldi, G.L. Raselli, J. Rico, L. Romero, E. Rondio, M. Rossella, A. Rubbia, C. Rubbia, P. Sala, N. Santorelli, D. Scannicchio, E. Segreto, Y. Seo, F. Sergiampietri, J. Sobczyk, N. Spinelli, J. Stepaniak, M. Stodulski, M. Szarska, M. Szeptycka, M. Szeleper, M. Terrani, R. Velotta, S. Ventura, C. Vignoli, H. Wang, X. Wang, C. Willmott, M. Wojcik, J. Woo, G. Xu, Z. Xu, X. Yang, A. Zalewska, J. Zalipska, C. Zhang, Q. Zhang, S. Zhen, W. Zipper. ITALY: L'Aquila, LNF, LNGS, Milano, Napoli, Padova, Pavia, Pisa, CNR Torino, Torino Univ., Politec. Milano. SWITZERLAND: ETH/Zürich. CHINA: Academia Sinica Beijing. POLAND: Univ. of Silesia Katowice, Univ. of Mining and Metallurgy Krakow, Inst. of Nucl. Phys. Krakow, Jagellonian Univ. Krakow, Univ. of Technology Krakow, A.Soltan Inst. for Nucl. Studies Warszawa, Warsaw Univ., Wroclaw Univ. USA: UCLA Los Angeles. SPAIN: Univ. of Granada, CIEMAT RUSSIA: INR (Moscow)

  4. The ICARUS project • Based on the liquid Argon time projection chamber technology (originally developed at CERN and supported by the Italian Institute for Nuclear Research (INFN) over many years of R&D) • Now a mature technology to detect with unprecedented quality the trajectories of elementary particles • Biggest achievement: • Construction of a fully instrumented 600 ton liquid argon experiment and operation on surface • Plan: • To install and operate a 3000 tons of liquid argon experiment underground at the LNGS (National Laboratory of Gran Sasso) near Rome, Italy

  5. 176 cm 434 cm Cosmic ray interactions with ICARUS 600 ton Shower 25 cm 85 cm 265 cm 142 cm Muon decay Hadronic interaction Run 960, Event 4 Collection Left Run 308, Event 160 Collection Left

  6. A 100 kton liquid argon underground observatory for neutrino physics and test of matter stability

  7. Astrophysical neutrinos Solar En ≈ 10 MeV Supernova En ≈ 30 MeV Atmospheric En ≈ 1 GeV

  8. Artificial neutrinos SPS Decay Ring PS Select focusing sign Superbeams b-beams Select ion Select ring sign

  9. Matter stability 100 kton = 6x1034 nucleons Do they live “forever” ?

  10. Concept: 100 kton liquid Argon detector Electronic crates f≈70 m h =20 m Insulation

  11. Open detector Gas Argon Liquid Argon Drift

  12. Summary parameters liquid Argon 100 kton

  13. Detector schematic layout Charge readout plane GAr E ≈ 3 kV/cm LAr Electronic racks Extraction grid E-field E≈ 1 kV/cm UV & visible light readout PMT + race track Cathode (–2MV) (Not to scale)

  14. The “dedicated” cryogenic complex Electricity Air Hot GAr W Underground complex GAr LAr Q External complex Joule-Thompson expansion valve Heat exchanger Argon purification LN2, …

  15. Concept: Cryogenic parameters

  16. Wish-list for this study

  17. Feasibility: storage tank • Underground storage of large quantity of liquid Argon at cryogenic temperature • Vacuum technology (external impurity tightness) • “Clean” internal materials (e.g. SS, surface treated) • Radiopurity of materials employed

  18. Undergound construction strategy • Tunnel access • E.g. Fréjus • Mine access • E.g. Polish site • Problem of space logistics • Safety

  19. Operation • LAr level constant (refilling) • LAr purity (continuous recirculation) • Emptying? • Safety

  20. Feasibility: Instrumentation • Internal mechanics (our instrumentation) • Internal-external UHV cold-hot interface

  21. Feasibility: Financing & time • Cost (order of magnitude) • Construction timescale

  22. Outlook • Presentation of polish site • W. Pytel • Presentation of Fréjus site • L. Mosca • Discussion on how to proceed

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