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Results from IceCube
Patrick BerghausUniversity of Delaware
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Patrick BerghausResults from IceCube
USA: Bartol Research Institute, Delaware Univ. of Alabama Pennsylvania State University UC Berkeley UC Irvine ClarkAtlanta University Univ. of Maryland Georgia Tech Ohio State University University of WisconsinMadison University of WisconsinRiver Falls LBNL, Berkeley University of Alaska, Anchorage University of Kansas Southern University and A&M
College, Baton Rouge, Louisiana
Sweden: Uppsala Universitet Stockholm Universitet
UK: Oxford University
Barbados: University of the
West IndiesBelgium: Vrije Universiteit Brussel Université Libre de Bruxelles Universiteit Gent Université de Mons
Germany: Universität Mainz DESYZeuthen Universität Dortmund Universität Wuppertal HumboldtUniversität Berlin RWTH Aachen Universität Bonn RuhrUniversität Bochum
Japan:Chiba University
New Zealand: University of Canterbury
Antarctica: AmundsenScott Station
Canada: University of Alberta
Switzerland:EPF Lausanne
IceCube Collaboration: > 250 People
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Patrick BerghausResults from IceCube
IceTop (Surface Array):●2 Surface Tanks per InIce String
●2 DOMs per Tank
●2010: 2x73 Tanks Installed
DeepCore (Low Energy):●6 Strings●DOMs have 50% higher q.e. (34%)●DOM Spacing 7 meters
InIce:●1 km3 instrumented●4800 DOMs, 17 meter spacing●80 strings●2010: 73 Strings deployed
IceCube: 3 Components
Surface:2835 m a.s.l
-1450 m
-2450 m
-2620 m
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Patrick BerghausResults from IceCube
IceCubeAMANDA(until 2009)
Runway
DeepCore
South Pole
Location: South Pole
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Patrick BerghausResults from IceCube
PMT: 10” HamamatsuDigitization: ATWD (custom): 300 Mhz / 400nsFADC: 40MHz / 6,400nsNoise Rate: 650Hz
12-LED 12-LED flasher flasher boardboard
Main Board
Digital Optical Module (DOM)
Waveform(CR Data)
PMT
400 ns
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Patrick BerghausResults from IceCube
6
EventTypes
Neutrino-Induced Muons(100 per hour)
CR Air Showers(2000 per second)
ApproximateValues for IC80(Trigger Level)
Neutrino-InducedCascades (had/em)
(<1 per day)
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Patrick BerghausResults from IceCube
7
All Sky Muon Flux (IC22, 2008)
arXiv:0902.0021
Neutrinos
Muons106
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Patrick BerghausResults from IceCube
8
7+ Decades in Energy
IceCube Neutrino Physics
Oscillations Gamma-Ray Bursts
Active Galactic Nuclei GZK Neutrinos(CMB Interactions)
Galactic Sources(Supernova Remnants?)
AtmosphericCharm Production
Dark Matter QG
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Patrick BerghausResults from IceCube
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Primary Interaction (?)
Muon Track
Muon Neutrino
Size: PMT Signal
Color: Time
Angular Resolution< 1°
Energy Resolution:0.3 in log
10E
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Patrick BerghausResults from IceCube
10
Size: PMT Signal
Color: Time
Neutrino-Induced Cascade
Reconstructed Energy:
80 TeV
fullycontained
Energy Resolution:0.1 in log
10E
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Patrick BerghausResults from IceCube
Neutrino Point Sources
X
CR Air Shower Array
direction scrambledby interstellar/-galactic
magnetic field
Cherenkov Telescope
ambiguity with purelyelectromagnetic
processes
Astrophysical Hadron Accelerator
Neutrino Telescope
“Smoking Gun”for hadronicacceleration
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Patrick BerghausResults from IceCube
Sky Coverage
A. Gross, MPIK-HD
Galactic Equator
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Patrick BerghausResults from IceCube
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Below Horizon:Data dominated by atmospheric NeutrinosEnergy Range 10s-100s of TeV
Above Horizon:Data dominated by atmospheric MuonsEnergy Range >PeV, increasing with angle
IC40 Point Source Search-log
10p: 5.28
prandom
: 18%
J. Dumm et al., UW
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Patrick BerghausResults from IceCube
Neutrino Point Source Flux Limits
Further Analyses:
Flare Searches
Multi-Wavelength
Target-of-Opportunity
Optical Follow-Up
Source Stacking
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Patrick BerghausResults from IceCube
PRELIMINARY
Based on 117 satellite-detectedGamma-Ray Bursts
Search for coincidentneutrino events
Burst parameters individually modeled
IceCube limit approaches“standard” Waxman-Bahcall neutrino emission model
Triggered GRB Search
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Patrick BerghausResults from IceCube
Indirect Dark Matter Searches
Neutralino(Kaluza-Klein)
Pair Annihilation
in
Sun(Earth,
Galactic Center,Galactic Halo)
Allowed Region fromDirect Measurements
(Cryogenic)
IC80+DC6 (expected)
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Patrick BerghausResults from IceCube
17
Electromagnetic Particles(10s-100s of MeV)
LE Muons(1-10 GeV)
HE Muons(TeV)
Shower Axis
IceTop
InIcePrimary Energy: 1-100s PeV
InIce Muon Multiplicity: 10s-1000s
Ratio depends onPrimary Mass
CR Physics
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Patrick BerghausResults from IceCube
18
Electromagnetic Particles(10s-100s of MeV)
LE Muons(1-10 GeV)
HE Muons(TeV)
Shower Axis
IceTop
InIcePrimary Energy: 1-100s PeV
InIce Muon Multiplicity: 10s-1000s
CR “Knee”
astro-ph/0210453
Primary composition becomes heavier
Ratio depends onPrimary Mass
CR Physics
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Patrick BerghausResults from IceCube
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Size: PMT Signal
Color: Time
IC79 CR ShowerShower core fully
containedin IceTop array
High-MultiplicityHE Muon Bundle
In InIce/DeepCore
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Patrick BerghausResults from IceCube
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IceTop/InIce Energy Correlation
<QMC
(A)>
= <Q
data>
<log A> = Heat
Eprim
≈ 10PeV
PRELIMINARY
IceTop (EM)
InIce(HE muons)
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Patrick BerghausResults from IceCube
PRELIMINARY
CR AnisotropyFirst measurement
in the southernhemisphere, consistent
with northern results
“Hot Spots”from nearby
Sources?
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Thank youfor your
attention!
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Patrick BerghausResults from IceCube
backup
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Patrick BerghausResults from IceCube
CR
muons
Moon ShadowMoon Shadow seenwith >6significance
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Patrick BerghausResults from IceCube
Neutrino Effective Area
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Patrick BerghausResults from IceCube
Angular Resolution (Muon Neutrinos)
50%
224080 String Configuration