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F. Arneodo Imaging 2003 The ICARUS T600 Liquid Argon Time Projection Chamber Francesco Arneodo Laboratori Nazionali del Gran Sasso on behalf of the ICARUS.

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Presentation on theme: "F. Arneodo Imaging 2003 The ICARUS T600 Liquid Argon Time Projection Chamber Francesco Arneodo Laboratori Nazionali del Gran Sasso on behalf of the ICARUS."— Presentation transcript:

1 F. Arneodo Imaging 2003 The ICARUS T600 Liquid Argon Time Projection Chamber Francesco Arneodo Laboratori Nazionali del Gran Sasso on behalf of the ICARUS Collaboration

2 F. Arneodo Imaging 2003 The ICARUS Collaboration S. Amoruso, P. Aprili, F. Arneodo, B. Babussinov, B. Badelek, A. Badertscher, M. Baldo-Ceolin, G. Battistoni, B. Bekman, P. Benetti, A. Borio di Tigliole, M. Bischofberger, R. Brunetti, R. Bruzzese, A. Bueno, E. Calligarich, D. Cavalli, F. Cavanna, F. Carbonara, P. Cennini, S. Centro, A. Cesana, C. Chen, Y. Chen, D. Cline, P. Crivelli, A.G. Cocco, A. Dabrowska, Z. Dai, M. Daszkiewicz, A. Di Cicco, R. Dolfini, A. Ereditato, M. Felcini, A. Ferrari, F. Ferri, G. Fiorillo, S. Galli, Y. Ge, D. Gibin, A. Gigli Berzolari, I. Gil-Botella, A. Guglielmi, K. Graczyk, L. Grandi, X. He, J. Holeczek, C. Juszczak, D. Kielczewska, J. Kisiel, L. Knecht, T. Kozlowski, H. Kuna-Ciskal, M. Laffranchi, J. Lagoda, B. Lisowski, F. Lu, G. Mangano, G. Mannocchi, M. Markiewicz, F. Mauri, C. Matthey, G. Meng, M. Messina, C. Montanari, S. Muraro, G. Natterer, S. Navas-Concha, M. Nicoletto, 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, E. Rondio, M. Rossella, A. Rubbia, C. Rubbia, P. Sala, R. Santorelli, D. Scannicchio, E. Segreto, Y. Seo, F. Sergiampietri, J. Sobczyk, N. Spinelli, J. Stepaniak, M. Stodulski, M. Szarska, M. Szeptycka, M. Terrani, R. Velotta, S. Ventura, C. Vignoli, H. Wang, X. Wang, M. Wojcik, X. Yang, A. Zalewska, J. Zalipska, P. Zhao, W. Zipper. ITALY: L'Aquila, LNF, LNGS, Milano, Napoli, Padova, Pavia, Pisa, CNR Torino, Politec. Milano. SWITZERLAND: ETHZ 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. ITALY: L'Aquila, LNF, LNGS, Milano, Napoli, Padova, Pavia, Pisa, CNR Torino, Politec. Milano. SWITZERLAND: ETHZ 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.

3 F. Arneodo Imaging 2003 Outline The LAr TPC Technology The T600 Detector Results from the 2001 run in Pavia

4 F. Arneodo Imaging 2003 Operating principles of the ICARUS LAr TPC: The technique - I ionizing events taking place in a volume of LAr (where a uniform electric field is applied) produce electron-ion pairs These charges drift along the field lines. The motion of the much faster electrons induces a current on the anode. The electrons can drift several metres if the LAr is highl purified (electronegative impurities < 0.1 ppb O 2 equiv.)

5 F. Arneodo Imaging 2003 The LAr TPC Technology (2) Charge Signals induced Drift time AB C Charge Drift time A B C Ionizing track e-e- 1 st Induction wire/screen grid 2 nd Induction wire grid (x view) Collection wire grid (y view) d d p Non-destructive multiple readout Continuous waveform recording Time -- drift 400 ns sampling Raw Data from a 10 m 3 prototype Scintillation Light

6 F. Arneodo Imaging 2003 The LAr TPC Technology (3) No charge multiplication occurs in LAr LAr is also a very good scintillator scintillation light (l = 128 nm) provides a prompt signal to be used for triggering purposes and for absolute event time measurement High electron mobility (~500 cm 2 V -1 s -1 ) Possibility of extreme purification (<0.1 ppb O 2 ) Long electron life time (>ms) and drift paths (>m) High electron-ion pairs yield (~ 10000 e - for 2 mm of a m.i.p. track) density: 1.4 g/cm 3 dE/dx: 2 MeV/c Available in large quantities (GAr ~ 0.9% of air)

7 F. Arneodo Imaging 2003 The T600 Module Two separate containers –inner volume/cont. = 3.6 x 3.9 x 19.6 m 3 Sensitive mass = 476 t 4 wire chambers with 3 readout planes at 0°, ±60° (two chambers / container) – 54000 wires (chann.) Maximum drift = 1.5 m –HV = -75 kV @ 0.5 kV/cm Scintillation light readout with 8 VUV sensitive PMTs

8 F. Arneodo Imaging 2003 LAr Cryostat (half-module) 20 m 4 m View of the inner detector The T600 Module during construction

9 F. Arneodo Imaging 2003 Approved and funded in 1996 Built between years 1997 and 2001 Completely assembled in the INFN assembly hall in Pavia Demonstration test run during first half 2001 –Three months duration –Completely successful –Data taking with cosmic rays Installation plan in the Gran Sasso underground Lab completed early 2003 Transportation and installation in LNGS in 2003-2004 The T600 Module

10 F. Arneodo Imaging 2003 Lifetime evolution during T600 Pavia run

11 F. Arneodo Imaging 2003 Muon bundle event (Run 699, Event 48) T600 Data 6 m

12 F. Arneodo Imaging 2003 3-D reconstruction

13 F. Arneodo Imaging 2003 e.m + hadron shower 2.2 m

14 F. Arneodo Imaging 2003 18 m 1.5 m Left Chamber Right Chamber Cathode Long longitudinal muon track crossing the cathode plane Track Length = 18.2 m 3D View Top View dE/dx = 2.1 MeV/cm 3-D reconstruction of the long track dE/dx distribution along the track

15 F. Arneodo Imaging 2003 3d reconstruction of a single muon

16 F. Arneodo Imaging 2003 Air Shower run 834 ev. 6 right chamber collection view left chamber collection view

17 F. Arneodo Imaging 2003 Run 939 Event 95 Right chamber T e =36.2 MeV Range=15.4 cm T e =36.2 MeV Range=15.4 cm Stopping muon reconstruction example Collection view Induction 2 view A A B B C C µ+ e+ µ+ e+ Induction 1 view

18 F. Arneodo Imaging 2003 -rays T600 Data 10 MeV3.2 MeV 1.8 MeV Two consecutive wires

19 F. Arneodo Imaging 2003 + e+e+ e + e - pair Run 844, Event 24 In-flight annihilation of positron Collection view Induction 2 view annihilation point 20% of positrons from µ decays expected to annihilate before stopping

20 F. Arneodo Imaging 2003 Physics goals atmospheric and long baseline studies proton decay

21 F. Arneodo Imaging 2003 Work is going on: Installation at Gran Sasso: tenders, infrastructures, etc. Optimization of electronics and trigger Analysis (calorimetry, momentum with multiple scattering, muon bundles, scintillation and Cherenkov light)


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