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Muon Rates as a function of Depth Edgar Casimiro Linares - CBPF Joao Carlos dos Anjos – CBPF Workshop on Angra Neutrino Detector Design – May 16-19, 2006.

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Presentation on theme: "Muon Rates as a function of Depth Edgar Casimiro Linares - CBPF Joao Carlos dos Anjos – CBPF Workshop on Angra Neutrino Detector Design – May 16-19, 2006."— Presentation transcript:

1 Muon Rates as a function of Depth Edgar Casimiro Linares - CBPF Joao Carlos dos Anjos – CBPF Workshop on Angra Neutrino Detector Design – May 16-19, 2006 – Rio de Janeiro

2 MAX/MIN Surfaces Define a MINIMUM Surface Define a MAXIMUM possible Surface Smin= S_upperface = π R 2 = 6.1575 m 2 Smax= π R 2 + 2 π R L =S upperface + S lateralface = 27.269 m 2 R=1.4m L=3.1m Most external vessel size

3 Define MIN/MAX Orthogonal Surfaces Upper face Lateral face

4 Known Integrated Flux… Muon Flux Hz/m^2 Provided by David Reyna at different depths

5 Muon Rate as a function of Depth Depth (m) Depth (MWE) MuonRate (Hz/m^2) Detector Rate MIN (Hz/m^2) Detector Rate MAX (Hz/m^2) 1.514205.012626852 3.028162.510015432 4.5312132.58164429 6.0416107.56623593 7.552090.05543008 9.012477.54772591 11.323062.53852089 12.833455.0391838 14.343847.52921588 15.854243.02651437 17.364638.02341270 18.95035.02161170

6 Number of Neutrino Signals Used algorithm provided by Joao to calculate the total number of neutrinos detected at a certain distance from the reactor core DetFlux= Sigma * FissionRate * NumProtTgts / [ 4 π D 2 ] Sigma=5.83E-43 [cm^2/fission] FissionRate=Pthev/EnergyRelease Pth: 4GW - Angra 2 EnergyRelease=203.78 [MeV/fission] TotScintMass: 1 (metric) ton NumCarbonAtoms=10, NumHydrogenAtoms=22

7 Neutrino Signals in a One Ton Detector Distance from Core (m) Neutrinos/Day 60 1270 70 933 80 714 90 564 100 457

8 S/B for different Distances and Depths Dist(m) Depth(mwe) 60708090100 41.3/5.9E59.3/5.9E67.1/5.9E65.6/5.9E64.6/5.9E6 121.3/3.8E59.3/3.8E67.1/3.8E65.6/3.8E64.6/3.8E6 241.3/2.2E59.3/2.2E67.1/2.2E65.6/2.2E64.6/2.2E6 501.3/1.0E59.3/1.0E67.1/1.0E65.6/1.0E64.6/1.0E6

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