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NuMI Beam Study

NuMI Beam Study. ν e component the LE beam configuration. Benjamin Brown University of Pittsburgh. NuMI LE Configuration. Contains ν μ , ν e ν μ absolute flux ~ 8.6 * 10 16 / m 2 year (@ 2.5 * 10 20 PoT/year) ν e contamination absolute flux about %1. Predicted CC Events.

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NuMI Beam Study

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  1. NuMI Beam Study νe component the LE beam configuration Benjamin Brown University of Pittsburgh

  2. NuMI LE Configuration • Contains νμ, νe • νμ absolute flux ~ 8.6 * 1016 / m2 year (@ 2.5 * 1020 PoT/year) • νe contamination absolute flux about %1

  3. Predicted CC Events • For the Fe configuration, EDDS absorber mass ~0.4 tons, for Pb, ~0.55 tons (@ 2.5 * 1020 PoT/year) • Pb gives:1500 CC e / year110K CC μ / year • Fe gives1100 CC e / year76K CC μ / year

  4. νe Flux Measurement • Look for electron production spectrum (presently, as generated by MC)

  5. Electron Spectrum

  6. Electron tan(θ) distribution

  7. νe expected flux

  8. Summary • Almost all electrons have E >~ 100 MeV • Almost all electrons are forward scattered.~60% with tan(θ) < 0.4

  9. Conclusion • If we are restricted to electrons with: a) tan(θ) < 0.4b) electron id efficiency of about 90%c) Pb configurationd) lose 10% due to e exiting the downstream edge of the brick • Then, in 1 year, we can expect a signal of ~700 events. (@ 2.5 * 1020 PoT/year)

  10. References • MINERνA proposal • “Request for a Test Exposure of OPERA Targets in the Numb Beam”, K. Kadoma et al • “Study of electron identificationin a few GeV region by an emulsion cloud chamber”, K. Kadoma et al; Review of Scientific Instruments, Vol. 74, Number 1, January 2003

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