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HELYCON

HELYCON. Developing and Constructing An Extensive Air Shower Detector. He llenic Ly eum C osmic O bservatories N etwork. Hellenic Open University University of Patras University of Athens National technical University NRCPS “Demokritos”. Antonis Leisos Hep2006-Ioannina.

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HELYCON

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  1. HELYCON Developing and Constructing An Extensive Air Shower Detector Hellenic Lyeum Cosmic Observatories Network Hellenic Open University University of Patras University of Athens National technical University NRCPS “Demokritos” Antonis Leisos Hep2006-Ioannina

  2. Cosmic Ray Energy Spectrum

  3. The Concept • primary mass • energy • age, Xmax • space angle • shower core

  4. Single Station Single Station Set-Up GPS Scintillator-PMT Scintillator-PMT 1 m2 ~20 m Scintillator-PMT Triangulation Shower Direction DAQ

  5. Multi Station Set up GPS Synchronisation

  6. The HELYCON Scintillation Module GPS timestamp Scintillator 2 Scintillator 3 Station Server

  7. Prototype Construction 10 x 12 cm tiles 80 tiles ~ 0.96 m2 12 WLS fibers per row Single PMT read out

  8. Scintillators & WLS fibers Scintillators : Protvino (Russia) Emission spectrum:420 nm Decay time 2 ns WLS fibers: Bicron (BCF-91A) Light attenuation length: 330cm

  9. PMT Testing Photonis XP-1912 Standard, 10-stage, 19 mm (3/4") round tube

  10. Detector Testing

  11. DAQ 4 PMT Signal Inputs Trigger Ouput USB Port GPS Input 25ps accuracy TDC

  12. DAQ • Handles 4-channels • Adjustable PMT Thresholds • Relative Arrival times < 1ns • Estimates Pulse sizes (TOT) and Shapes • Synchronization with GPS ~ 25ns • Digital Interface to PC • Slow Controls & Environmental Monitoring • GPS • (Motorola M12+Timing Oncore) • 25 ns UTC accuracy can be better (up to 5ns) • HPTDC • 32 channels (LR) – 8 Channels (HR) • 25ps (HR) to 800 ps (LR) accuracy • Self Calibrating

  13. Software Tools CORSICA (Extensive Air Shower Simulation) GEANT4 (Scintillation, WLS & PMT response)

  14. Software Tools DAQSIM (DAQ Simulation) HOUANA (Analysis & Track Reconstruction) Height (mV) Time (ns) Zentih (degrees)

  15. Monte Carlo Studies • Reconstruction of Shower Direction • Reconstruction of the Shower Core Properties Particles/m2 Distance from core (m) Vertical Proton Showers (106-107 GeV)

  16. Monte Carlo Studies Needed corrections curvature Core distance>500m thickness ns after 1st particle

  17. Monte Carlo Studies Some Corrections (thickness) Time Delay (ns) Time Spread (ns) Distance from core (mm) Distance from core (mm) Vertical Proton Showers (106-107 GeV)

  18. Monte Carlo Studies Single Station Performance Θrec-Θtrue Pull Vertical Proton Showers (106-107 GeV)

  19. Monte Carlo Studies Single Station Performance Reconstruction efficiency Resolution (degrees) SQC (σθ=6.4) SQC (σθ=6.4) Distance from core (m) Distance from core (m) Vertical Proton Showers (106-107 GeV)

  20. Monte Carlo Studies Examples of a 3-Station Performance (Crude Analysis) Resolution per reconstructed track (degrees) Threshold Charge (pes) Vertical Proton Showers (106-107 GeV)

  21. HELYCON Online Control & Data Analysis Package graphics & presenter control real time monitor shower reconstruction data analysis real data & data summary storage

  22. Time Schedule

  23. 1019 eV 1015 eV 1017 eV 2 km HELYCON in Patras

  24. Eurocosmics

  25. The General Idea… • Angular offset • Efficiency • Resolution • Position

  26. The Example of Amanda-Spase 30 stations (4 scint. 0.2 m2 in a triangular grid, 30m spacing) B10 resolution 3.8 degrees

  27. Very High Energy Very High Zenith Angle Extreme low rate ~4km ~20km

  28. The Concept Floating stations (Sea Technology?) We propose a minimum of 3 stations with at least 3 m2 scintillator detectors each

  29. Monte Carlo Studies Examples of a Multi-Station Performance (Crude Analysis) Resolution in determining a possible Angular Offset (degrees)-10 day operation Station Configuration Not need for position holding Number of stations Vertical Proton Showers (106-107 GeV)

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