1 / 24

Neutrino Physics with IceCube

Neutrino Physics with IceCube. Overview Design of IceCube Construction Status Current Physics Results. Erik Blaufuss University of Maryland for the IceCube Collaboration. THE ICECUBE COLLABORATION. Sweden: Uppsala Universitet Stockholm Universitet. USA:

aram
Download Presentation

Neutrino Physics with IceCube

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. Neutrino Physics with IceCube • Overview • Design of IceCube • Construction Status • Current Physics Results Erik Blaufuss University of Maryland for the IceCube Collaboration

  2. THE ICECUBE COLLABORATION Sweden: Uppsala Universitet Stockholm Universitet USA: Bartol Research Institute, Delaware Pennsylvania State University UC Berkeley UC Irvine Clark-Atlanta University University of Maryland University of Wisconsin-Madison University of Wisconsin-River Falls Lawrence Berkeley National Lab. University of Kansas Southern University and A&M College, Baton Rouge University of Alaska, Anchorage Germany: Universität Mainz DESY-Zeuthen Universität Dortmund Universität Wuppertal Universität Berlin MPI Heidelberg RWTH Aachen UK: Oxford University Netherlands: Utrecht University Japan: Chiba university Belgium: Université Libre de Bruxelles Vrije Universiteit Brussel Universiteit Gent Université de Mons-Hainaut New Zealand: University of Canterbury 30 institutions, ~250 members http://icecube.wisc.edu E. Blaufuss - Neutrino Physics with IceCube

  3. 4800 Digital Optical modules on 80 strings 160 Ice-Cherenkov tank surface array (IceTop) Instrumenting 1 km3 of Antarctic Ice Surrounding exisiting AMANDA detector 677 Optical Modules Just completed 3rd construction season IceCube E. Blaufuss - Neutrino Physics with IceCube

  4. IceCube at the South Pole IceCube South Pole Station AMANDA Skiway Dark sector Geographic South Pole E. Blaufuss - Neutrino Physics with IceCube

  5. Life at the South Pole E. Blaufuss - Neutrino Physics with IceCube

  6. The Digital Optical Module (DOM) • Waveforms captured on Main Board • Each DOM self-triggering • Custom waveform digitization at 300 MHz (~425ns) • Commercial fADC chip at 40 MHZ (~6 usec) • Timing calibrations with surface GPS clock to ~2ns • Low intrinsic dark noise ~ 500 Hz (260 Hz w/ 200 sec) • Low Power consumption: <5 W per DOM • Large dynamic range (~1000pe/10ns) • Main board software is reprogrammable • Self calibrating • Very robust design: Failure rate <1%

  7. correlated noise Noise characteristics of modules very low PMT random noise due to low temperature correlated noise due to radioactivity driven fluorescence in glass AMANDA suppress correlated noise by artificial deadtime O(200μs) IceCube noise rate distribution: 9 IceCube strings mean ~ 260 Hz width ~ 30 Hz Poissonian expectation E. Blaufuss - Neutrino Physics with IceCube rate [kHz]

  8. IceCube calibrations LED Flashers Standard Candle E. Blaufuss - Neutrino Physics with IceCube

  9. Drilling and Deployment E. Blaufuss - Neutrino Physics with IceCube

  10. E. Blaufuss - Neutrino Physics with IceCube

  11. IceCube string and IceTop station 01/05 IceCube string and IceTop station 01/06 IceTop station only 2006 IceCube string and IceTop station 02/07 Deployments 2005: 1 2006: 8 2007: 13 (12 planned) 2008: 14 2009: 14 2010: 14 2011: 11+ AMANDA 01/ 2000 78 74 73 72 67 66 65 59 58 57 56 50 49 48 47 46 40 39 38 30 29 21 E. Blaufuss - Neutrino Physics with IceCube

  12. IceCube Integrated Volume (Projected) • Graph shows cumulative km3·yr of exposure × volume • 1 km3·yr reached 2 years before detector is completed • Close to 4 km3·yr at the beginning of 2nd year of full array operation. E. Blaufuss - Neutrino Physics with IceCube

  13. Angular resolution Effective Area for Muons Galactic center *Studies based on simpler reconstructions waveform information will improve IceCube as a Neutrino Telescope Muon neutrino Electron neutrino Tau neutrino E. Blaufuss - Neutrino Physics with IceCube

  14. AMANDA Skymap Significance / s 2000-2004 Largest fluctuation: 3.7s at 12.6 h, +4.5 deg AMANDA II data from 2000-2004 (1001 live days) 4282  from northern hemisphere Random events 69 out of 100 sky maps with randomized events show an excess higher than 3.7s No significant “hot spot” E. Blaufuss - Neutrino Physics with IceCube

  15. Search for neutrinos from interesting spots 1ES1959 Cyg-X3 Mk421 Mk501 Cyg-X1 crab M87 SS433 3C273 event selection optimized for both dN/dE ~ E-2 and E-3 spectra No significant excess observed E. Blaufuss - Neutrino Physics with IceCube

  16. IceCube as MeV SN  detector …first proposed by Halzen, Jacobsen & Zas, astro-ph/9512080 IceCube at 10kpc • Takes advantage of low noise DOMs • Ice uniformly illuminated • Detect correlated rate increase on top of PMT noise • Participation in SNEWS • Also search for High Energy … E. Blaufuss - Neutrino Physics with IceCube

  17. Looking for core collapse SN Significance of observation vs distance: signal expected at LMC: 52 kpc Integrated over 10s IceCube AMANDA Visibility up to Large Magellanic Cloud (~ 5  signal) E. Blaufuss - Neutrino Physics with IceCube

  18. Atmospheric neutrinos • Dominant background • Point source searches • Diffuse neutrinos • Important calibration “beam” • Standard candle to measure sensitivity to neutrinos • Establishes IceCube as a neutrino detector! E. Blaufuss - Neutrino Physics with IceCube

  19. Atmospheric neutrinos in 2006 Data selection done online at S. Pole and transferred by satellite North At selected cut strength of 10: 234 up-going muon events found MC Expectation: 225 +81/-77 (211 neutrino + 14 background) Clean sample of neutrinos! John Pretz, Ph.D. thesis DRUM 1903-4163 E. Blaufuss - Neutrino Physics with IceCube

  20. Diffuse neutrinos with AMANDA Limit on diffuse E-2νμflux (15.8 TeV - 2.51 PeV): E2μ(E) < 8.8 ·10–8 GeV cm-2 s-1 sr-1 E. Blaufuss - Neutrino Physics with IceCube

  21. Other physics topics… • Science potential with IceCube is vast… • Point source searches • Diffuse neutrinos • GRB neutrinos • Cosmic ray physics • Search for exotic particles and new physics • Monopoles, WIMPs… • Supernova neutrinos • Very active working groups… E. Blaufuss - Neutrino Physics with IceCube

  22. Summary • IceCube construction is well underway! • More than 25% complete. • Completed detector in 2011. • 1 km^3*yr exposure in ~2 years • Physics analysis already underway. • IceCube atmospheric neutrino results • AMANDA analysis results • More to come… E. Blaufuss - Neutrino Physics with IceCube

  23. Backup material E. Blaufuss - Neutrino Physics with IceCube

  24. The Enhanced Hot Water Drill EHWD designed to drill a 2450 m × 60 cm hole in ~30 hr. Fuel budget is 7200 gal per hole. Shown above is drill camp and tower site (inset), both mobile field arrays. Everything must fit into LC-130 for transport to Pole. Supply: 200 GPM @ 1000 psi, 190 °FReturn: 192 GPM @ 33 °F Make-Up: 8 GPM @ 33 °F Thermal Power: 4.5 Megawatt E. Blaufuss - Neutrino Physics with IceCube

More Related