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Spyros Eust. Tzamarias Astroparticle Physics HELYCON KM3NeT A Progress Report on the Hellenic Lyceum Cosmic Observatories Network Project A Report on the.

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Presentation on theme: "Spyros Eust. Tzamarias Astroparticle Physics HELYCON KM3NeT A Progress Report on the Hellenic Lyceum Cosmic Observatories Network Project A Report on the."— Presentation transcript:

1 Spyros Eust. Tzamarias Astroparticle Physics HELYCON KM3NeT A Progress Report on the Hellenic Lyceum Cosmic Observatories Network Project A Report on the Contribution to the Design Study for a Very Large Volume Neutrino Telescope – KM3NeT

2 Researchers% HELYCON% KM3NeT%ATLAS (2008) Outreach S. Tzamarias A.Leisos2080 N. Gizani7030 A.Christopoulou3010 A.Tsirigotis2080 I.Gialas30 A.Papageorgiou3070 N. Fragoulis (left 2007)10 90 PhD Students G. Zesimopoulos20 G. Bourlis4060 New student100 Technical Staff G. Georgis G. Tsakogeorgas40 10 Educators V. Verganelakis40 E. Pierri30 E. Kotrotsou30 Hellenic Open University – Aegean University Research Group with a lot of help from Demokritos, Univ. of Patras, Univ. of Thessaloniki, NTUA, Univ. of Athens

3 HELYCON Hellenic Lyceum Cosmic Observatories Network

4 HV Generator: EMCO CA20N Temperature Sensor LED PH: XP1912 HELYCON: HELYCON: Detector Construction

5  Data - Monte Carlo Prediction Charge (in units of mean p.e. charge) Light Collection Uniformity: better than 8% Time Resolution: 1.3ns Time Delays Consistent with R.I. (η=1.3) Response to M.I.P.s

6 Slewing Resolution HELYCON: HELYCON: Testing and Shower Reconstruction A1 A2 A3 B1 B2 B3 Zenith angle distribution of reconstructed atmospheric showers (data points) with Monte Carlo (CORSICA, solid line) predictions using: a) the detectors A1, A2, A3, B1, B2, B3, b) the counters A1, A2, A3 and c) using the counters B1, B2, B3

7 Observations of Extensive Air Showers - Resolution The performance of HELYCON in detecting and reconstructing showers has been studied by operating a system of eight HELYCON detectors in the laboratory. group A σ A MC =4.5 ο ±0.5 o, group B σ B MC =5.2 ο ±0.6 o, all six detectors σ 6 MC =3.5 ο ±0.3 o. These resolutions can be evaluated solely from the real data, by comparing the results obtained by the two detector groups (A and B) on an event by event basis. The distribution of the difference (Δθ=θ Α -θ Β ) of these two estimations of the zenith angle has a spread of σ DATA =7.2 ο ±0.2 ο. This spread is consistent with the above MC predictions of the detector resolution: MC Estimated resolution σ= 7.2 ο ±0.2 ο

8 Detectors made in Protvino Good Uniformity (<5%), Time Resolution (MIP) ~ 3ns, Linearity ?

9 KASCADE-Grande / LOPEZ

10 The First HELYCON Antenna in Chios R&D for Radio-Detection of Atmospheric Showers Monte Carlo Simulation of Radio Emission Reconstruction Studies three more radio sets by December 2008

11 PatrasChiosNicosiaThessalonica stations 4+6 stations 4 stations 1 station 3 radio sets 1 radio set HELYCON HELYCON: Detector Deployment

12 μ track km3 KM3NeT:Conseptual Design for a Deep ‐ Sea Re search Infrastructure Incorporating a Very Lar ge Volume Neutrino Telescope 19m 5m three platforms, with 16 HELYCON detectors each, operating for 10 days, offer a 0.05 o calibration resolution in zenith angle and less than 0.8m error in estimating the absolute position of the neutrino telescope KM3 Neutrino Telescope angular calibration and absolute position

13 σ1(na)σ1(na) A eff (n a ) [m 2 ] nana nana Investigation for a systematic angular offset of the KM3NeT Calibration resolution per single shower event (degrees) n a : minimum number of active detectors per shower event Effective area of a floating detector station The calibration resolution per single shower decreases when events with more active detectors are selected because the reconstruction accuracy of the shower’s direction improves. However, the requirement of more active detectors per event results to a reduction of the effective area of the floating detector array.

14 minimum number of active detectors per shower event. Investigation for a systematic angular offset of the KM3NeT The calibration resolution, σ c (n a ), in identifying a possible angular offset in the neutrino telescope estimations using the three floating detector arrays, is: For 3 EAS detector stations and 10 days of operation the calibration resolution has a minimum for n a ≤5. The proposed calibration system will be able to measure a possible zenith angle offset with an accuracy of ~0.05 o. σ c (n a ) [degrees] nana

15 Determination of the KM3NeT Absolute Position The resolution in estimating the (X-Y) coordinates of the under-water detector, as a function of the number of active detectors, using: (a) single reconstructed EAS and (b) showers collected by three floating arrays during 10 days of operation. The proposed technique can estimate the absolute position of the neutrino telescope with an accuracy ~0.6m. nana (a) nana (b)

16 RMS ANTARES: 1.5 o RMS Surface Array: 3 o RMS ANTARES: 4 o RMS Surface Array: 3 o 5 Days Data Collection measurement of a possible offset in the zenith angle estimation with an accuracy better than 0.4 o

17 Digitization Electronics: Multiple Time over Threshold HELYCON and Neutrino Telescopy Time Voltage Comparison of the PMT wave-form with 6 voltage thresholds and time digitization of the crossing points HPTDC 32 channels (LR) – 8 Channels (HR) 25ps (HR) to 800 ps (LR) accuracy Self Calibrating D. Loucas et all

18 Time Over Threshold Electronics for an Underwater Neutrino Telescope, G. Bourlis, A. Tsirigotis, S. Tzamarias, VLNT 2008, to be appear in NIM charge resolution 4% 4 threshold crossings KM3NeT:Conseptual Design for a Deep ‐ Sea Research Infrastructure Incorporating a Very Large Volume Neutrino Telescope

19 other HOU contributions to the KM3NeT Design Study Detailed Monte Carlo simulation package for very large volume neutrino telescopes pictorial representation of a ν charged current interaction inside the neutrino telescope pictorial representation of the Cherenkov light production and detection with optical modules Fast Filtering and Triggering algorithms signal hits background hits

20 KM3NeT resolution ~ 0.1 deg EAS Detector resolution ~ 1 deg KM3NeT’s resolution measurement Impossible using EAS array Estimation of the angular resolution of the KM3NeT – (Inter-Calibration) (Inter-Calibration) 1.Divide the KM3NeT detector in 2 identical sub detectors 2.Reconstruct the muon separately for each sub detector 3.Compare the 2 reconstructed track directions Working Example IceCube Geometry 9600 OMs looking up & down in a hexagonal grid. 80 Strings, 60 storeys each. 17m between storeys MultiPMT Optical Module 125m

21 Resolution Estimation (1 TeV Muons, isotropic flux, IceCube Geometry, 9600 OMs) Zenith angle resolution of subdetectors (degrees)Zenith angle resolution of whole detector (degrees) σ=0.095 o ±0.005 o σ=0.07 o ±0.003 o

22 Resolution Estimation (1 TeV Muons, isotropic flux, IceCube Geometry, 9600 OMs) Zenith angle difference between the 2 reconstructed directions (degrees) Space angle difference between the 2 reconstructed directions (degrees) σ=0.14 o ±0.01 o ≈ o ±0.005 o

23 KM3 Calibration Summary The operation of 3 stations (3x16 counters) for 10 days will provide: The determination of a possible angular offset of the KM3NeT with an accuracy ~ 0.05 deg The determination of the absolute position of the KM3NeT with an accuracy ~ 0.6 m Efficiency vs Energy and Zenith angle… Resolution can be estimated without bias using the HOU inter-calibration technique

24 other HOU contributions to the KM3NeT Design Study e.g. Kalman Filter applications Novel event (direction, energy) reconstruction techniques Simultaneous pattern recognition (i.e. noise filtering and event selection) and reconstruction (direction, enery) Application of Kalman Filter methods to event filtering and reconstruction for neutrino telescopy,, A. Tsirigotis, S. Tzamarias, VLNT 2008, to be appear in NIM Current Work: Energy Estimation

25 Towards a KM3 TDR HOU Future Contribution Contribute to all simulation studies Finalize the KM3 Calibration Scheme Finalize a ReadOut proposal based on the multi-time-over-threshold experience Study deep water solutions for UHE (down coming) neutrinos

26 PhD Thesis “Functional characteristics and detector facility of a prototype detector for the undersea neutrino telescope NESTOR: Measurement of the atmospheric muon flux in the depth of 3800 m underwater“Functional characteristics and detector facility of a prototype detector for the undersea neutrino telescope NESTOR: Measurement of the atmospheric muon flux in the depth of 3800 m underwater” A. Tsirigotis Technical Notes “The Architecture of the Data Acquisition System at the Shore Laboratory of the NESTOR Experiment” HOU-NS-TR EN, Dec 2004,The Architecture of the Data Acquisition System at the Shore Laboratory of the NESTOR Experiment “Event Building in a 4-Floor NESTOR Detector” HOU-NS-TR EN, Dec pp,Event Building in a 4-Floor NESTOR Detector “Evaluation Tools for the Performance of a NESTOR Test Detecto“Evaluation Tools for the Performance of a NESTOR Test Detector” HOU-NS-TR EN, Oct pp,, “Estimation Techniques of the Atmospheric Muon Flux at the NESTOR Site” HOU-NS-TR EN, Nov pp,Estimation Techniques of the Atmospheric Muon Flux at the NESTOR Site “NESTOR Analysis Tools: Interactive Fit” HOU-NS-TR EN,NESTOR Analysis Tools: Interactive Fit “NESTOR Analysis Tools: Signal Processing” HOU-NS-TR EN,NESTOR Analysis Tools: Signal Processing “NESTOR Analysis Tools: Track Fitting” HOU-NS-TR EN,NESTOR Analysis Tools: Track Fitting “Simulation Tools and Methods for Underwater Neutrino Telescopy”, HOU-NS-TR EN, “Performance of the NESTOR Calibration System” HOU-NS-TR EN “Simulation Tools and Methods for Underwater Neutrino TelescopyPerformance of the NESTOR Calibration System NESTOR Data Analysis: Background Sources and Rejection TechniquesNESTOR Data Analysis: Background Sources and Rejection Techniques” HOU-NS-TR EN / Selected Contributions to Astroparticle Physics Publications to Journals and Proceedings G. Bourlis, A. G. Tsirigotis, S. E. Tzamarias, "Time Over Threshold electronics for an Underwater Neutrino Telescope", to be published (accepted) in Nuclear Instruments and Methods in Physics Research A (NIMA) 2008 HELYCON: Towards a sea-top Infrastructure, S. Tzamar;ias IDM2006, HELYCON a Progress Report Proceedings of 20th European Cosmic Ray Symposium, Lisbon, Portugal Jean-Pierre Ernenwein, A. G. Tsirigotis, S. E. Tzamarias, "Study of the calibration potential of HELYCON detectors with ANTARES", to be published (accepted) in Nuclear Instruments and Methods in Physics ResearchA (NIMA) 2008 A. G. Tsirigotis, S. E. Tzamarias, "Application of Kalman filter methods to event filtering and reconstruction for Neutrino Telescopy", to be published (accepted) in Nuclear Instruments and Methods in Physics Research A(NIMA) 2008 NESTOR Collaboration, NESTOR DEEP SEA NEUTRINO TELESCOPE: DEPLOYMENT AND RESULTS, Nucl.Phys.Proc.Suppl.151: ,2006 (Cited 2 times )2 times NESTOR Collaboration, OPERATION AND PERFORMANCE OF THE NESTOR TEST DETECTOR: A MEASUREMENT OF THE ATMOSPHERIC MUON FLUX, Nucl.Phys.Proc.Suppl.143: ,2005. NESTOR Collaboration, RECENT RESULTS FROM NESTOR, Nucl.Instrum.Meth.A567: ,2006 (Cited 3 times )3 times NESTOR Collaboration, A MEASUREMENT OF THE COSMIC-RAY MUON FLUX WITH A MODULE OF THE NESTOR NEUTRINO TELESCOPE, Astropart.Phys.23: ,2005 (Cited 13 times )13 times NESTOR Collaboration, OPERATION AND PERFORMANCE OF THE NESTOR TEST DETECTOR, Nucl.Instrum.Meth.A552: ,2005 (Cited 8 times )8 times NESTOR Collaboration,NESTOR EXPERIMENT IN 2003, Phys. At. Nucl. 67 (2004) A.G. Tsirigotis, NESTOR FIRST RESULTS, Eur.Phys.J.C33:s956 s958,2004 (Cited 3 times )3 times

27 Contributions to Conference/Workshops “IX International Workshop on Neutrino Telescopes”, Venice – Italy, 2001, (one talk in plenary session)http://axpd24.pd.infn.it/conference2001/venice01.html “Very High Energy Phenomena in the Universe”, Les Arcs – France, 2001, (one talk in plenary session)http://moriond.in2p3.fr/J01/ “Current Developments in High Energy Physics”, Patras – Greece, 2002 (one invited talk and two talks in the parallel sessions) “Fourth International Workshop on Ring Imaging Cherenkov Detectors”, Pylos – Greece, 2002, (one talk in plenary session)http://www.nestor.org.gr/rich2002/ “School and Workshop on Neutrino Particle Astrophysics”, Les Houches – France, 2002, (one talk in plenary session)http://leshouches.in2p3.fr/ “International Europhysics Conference on High Energy Physics”, EPS, Aachen – Germany, 2003, (one talk in parallel session)http://eps2003.physik.rwth-aachen.de/ “Workshop on Technical Aspects of a Very Large Volume Neutrino Telescope in the Mediterranean Sea”, Amsterdam – Netherlands, 2003, (one plenary invited talk and three talks in parallel session) “High Energy Neutrino Astronomy Workshop”, College de France – France 2003, (one talk in plenary session)http://antares.in2p3.fr/antares/stolar/km3/ “Recent Advances in Particle and Astroparticle Physics”, HEP 2004, Chios – Greece, 2004, (one invited talk and four talks in plenary session)http://hep2004.chios.aegean.gr/ “XXIst International Conference on Neutrino Physics and Astrophysics”, College de France – France, 2004, (one talk in plenary session)http://neutrino2004.in2p3.fr/ “Science Technology Education”, Kalamata – Greece, 2004, (one talk in plenary session)http://hercules.kee.gr/attachments/file/IOSTE/stegr.htm “XIII International Symposium on Very High Energy Cosmic Ray Interaction” in Pylos – Greece, 6-12 September 2004, (one talk in plenary session) “Recent Developments in High Energy Physics and Cosmology”, Ioannina – Greece, 2006, (one invited talk and three talks in plenary sessions)http://hep2006.physics.uoi.gr “20th European Cosmic Ray Symposium (ECRS 2006)", Lisbon, Portugal, 5-8 September 2006, (one talk in plenary session)http://www.lip.pt/events/2006/ecrs/ “2nd Workshop on Cosmic Rays in Schools Projects", Lisbon, Portugal, 9 September 2006, (one talk in plenary session)http://www.lip.pt/events/2006/crsp/ “6th International Workshop on the Identification of Dark Matter (IDM 2006)", Rhodes, Greece, September 2006, (one invited talk) “TeV Particle Astrophysics 2007", Venice, Italy, August 2007, (one talk in the parallel sessions)http://www.pd.infn.it/TeV/ “10th ICATPP Conference on Astroparticle, Particle, Space Physics, Detectors and Medical Physics Applications", Como, Italy, 8-12 October 2007, (one talk in plenary session) “6th International Workshop on Ring Imaging Cherenkov Counters (RICH2007)", Trieste, Italy, October 2007, (poster presentation)http://rich2007.ts.infn.it/ “ΧΧVI International Workshop on Recent Developments in High Energy Physics and Cosmology”, Anc. Olympia- Greece, 2008, (one invited and two plenary talks)

28 Problems HELYCON – almost none for the moment but … “how big?” (my feeling) cannot continue alone Neutrino Telescopy – lack of data, lack of information, lack of coherency, no role in PP … demanding LHC (my feeling) continue contributing to the TDR of KM3NeT

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