1 / 29

The IceCube project and its EHE capability

The IceCube project and its EHE capability. Aya Ishihara University of Wisconsin – Madison (for the IceCube collaboration). Outline. The IceCube Detector. IceTop. AMANDA. 1450m. Digital Optical Module. 2450m. and more. This year’s strings.

liberty-clemons
Download Presentation

The IceCube project and its EHE capability

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. The IceCube projectand its EHE capability Aya Ishihara University of Wisconsin – Madison (for the IceCube collaboration)

  2. Outline

  3. The IceCube Detector IceTop AMANDA 1450m Digital Optical Module 2450m

  4. and more This year’s strings 9 strings and 16 ice-top station have been deployed Toward 80 string km3 detector ~125m AMANDA

  5. GZK Neutrino and Beyond • GZK neutrino • Beyond the Standard Model

  6. Extremely High Energy Neutrino Targets

  7. t t ng EHE Events in the Earth CR • Generally upgoing events are selected • Earth is opaque for EHE neutrino • EHE neutrino events are mostly down-going NOT up-going down-going m EHE n m m,t m North ng m nm up-going nm > PeV nm <1PeV

  8. EHE Events in Ice GZK neutrino induced lepton and atmospheric muon fluxes at the IceCube depth EGZK >> EAtmm

  9. e+e- p e+e- photo-nuclear m g pair-creation bremsstrahlung EHE Events with the IceCube • Muon energy losses by radiation cascading dE/dx propto E

  10. Muon Events m m m 9 EeV 100 TeV m

  11. MC Setup • Benchmarking models • GZK muons and tau signals • Atmospheric muon background

  12. NPE • Explain Waveforms and NPE just an integral of all the arrival phot-electron • In-ice particle energy dependent, No timing/geometrical information

  13. Another factor to NPE Events with the same energy ~ 30PeV contained High npe: 10^7 npe uncontained Low npe: 1000 npe

  14. t m GZK m Atmospheric m GZK t NPE Distributions

  15. Zenith Distributions Zenith angle GZK m GZK t Atmospheric m down up

  16. Signal Cuts GZK m Atmospheric m

  17. Event Rate 80 strings GZK m GZK t Atmospheric m GZK m GZK t Atmospheric m GZK m3.5events/year GZK t0.56events/year Atmospheric m0.33events/year

  18. Event Rate 9 strings and more GZK m Atmospheric m • With the same cut for all the string numbers GZK m string numbers 9 20 40 60 80 Atmospheric m

  19. 80 strings up-going horizontal down-going Effective Area 1010 GeV 80 S 9 S 108 GeV up-going horizontal down-going

  20. Energy Calibration • Absolutely calibrated photon source (standard-candle) and receivers (golden-dom) SC s40 GD s39

  21. Standard Candle

  22. CR m m IceTop: Background Tagging • Major background is atmospheric muon of which in-ice nature still unknown at this regime • Tagging on the surface muons with surface array for an additional information EHE n m,t

  23. Conclusion -outlook- • IceCube is capable of EHE and the capability is glowing year-by-year • EHE event selection can be done only using amount of photon emitted / received • For reconstruction of further uncontained events, energy/geo, more sophisticated methods using information of photon propagation in ice, e.g. arrival timings, geometrical distributions reflected in waveforms • subsystems

  24. Extra slids

  25. Timing/Geometry • In-ice in-DOM flasher

  26. Effective Area 9 strings and more up-going horizontal down-going

  27. 3km deep ice at South Polevery clear below 1450m depth IceCubeunder construction AMANDA-IICompleted in 2000

  28. The IceCube collaboration

More Related