1 / 26

Calibration of a km 3 ν- Telescope Using Extensive Air Showers

Calibration of a km 3 ν- Telescope Using Extensive Air Showers. A crude (lower limit) estimation of resolution and event rate Development and Construction of an Extensive Air Shower Array in HOU. Antonis Leisos, Hellenic Open University Erlangen 11-13 April 2006.

silvio
Download Presentation

Calibration of a km 3 ν- Telescope Using Extensive Air Showers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Calibration of a km3ν-Telescope Using Extensive Air Showers • A crude (lower limit) estimation of resolution and event rate • Development and Construction of an Extensive Air Shower Array in HOU Antonis Leisos, Hellenic Open University Erlangen 11-13 April 2006 The project is co-funded by the European Social Fund & National Resources EPEAEK-II (PYTHAGORAS)

  2. Cosmic Ray Energy Spectrum

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

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

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

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

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

  8. Multi Station Set up Multi Station Set-Up

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

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

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

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

  13. Detector Testing

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

  15. 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

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

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

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

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

  20. Monte Carlo Studies Some Corrections (thickness) Time Delay (ns) Time Spread (ns) Pes Pes Vertical Proton Showers (106-107 GeV)

  21. Monte Carlo Studies Single Station Performance Θrec-Θtrue Pull Vertical Proton Showers (106-107 GeV) QC: charge(p.e.s)>75.

  22. Monte Carlo Studies Single Station Performance Reconstruction efficiency Resolution (degrees) Distance from core (m) Distance from core (m) Vertical Proton Showers (106-107 GeV) QC: charge(p.e.s)>75.

  23. Monte Carlo Studies Examples of a 3-Station Performance (Crude Analysis) Resolution per reconstructed track (degrees) Resolution in determining a possible Angular Offset (degrees)-10 day operation Threshold Charge (pes) Threshold Charge (pes) Vertical Proton Showers (106-107 GeV)

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

  25. Time Schedule

  26. 1019 eV 1015 eV 1017 eV 2 km Another use of the detectorsHELYCON

More Related