IceCube Neutrino Observatoryhalzen/notes/week14-2.pdf · IceCube Neutrino Observatory
1 Deep Sea Neutrino Telescope Detection Principle.
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Transcript of 1 Deep Sea Neutrino Telescope Detection Principle.
1
Deep Sea Neutrino TelescopeDeep Sea Neutrino Telescope
Detection PrincipleDetection Principle
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Basic Properties of Neutrino Spin: ½ (fermion)
Type: lepton
Flavors: muonic, electronic, tau
Masses: very small (different masses)
Interactions: Weak, Gravitation
Peculiarities: flavor oscillations
Detection: only through interactions
μ+
W+
u
d
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Interaction Volum
e
νμ
Θν-μ
μ Detector
(Electro
magnetic In
teractio
ns)
Detection Principle• Large Interactive Volume
• Efficient μ Detection
μ-νμ
μ-
W-
d
u
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Cherenkov Radiation
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Cherenkov Radiation
Properties
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Photo-Sensor (Photomultiplier- PMT)
Cherenkov Wavefront
Experimental Principle
Muon TrajectoryCherenkon Photon Path
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PMT signals
Muon Tracking
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x/λ0 eII
How clean ?How deep ?
Cosmic μ background
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• Energy dependent
• Direction dependent
• Tracking Resolution
Estimated by Monte Carlo Integration
generated
tedreconstruc
N
Narea
Effective AreaEffective AreaGeometrical acceptance Reconstruction Efficiency
Good Tracking Resolution & Large Effective Area for all Energies and Directions