Neutrino Flux Nominal and Deformed z Nicholas Lira University of - - PowerPoint PPT Presentation

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Neutrino Flux Nominal and Deformed z Nicholas Lira University of - - PowerPoint PPT Presentation

Neutrino Flux Nominal and Deformed z Nicholas Lira University of Texas Arlington DUNE Group July 20 2017 z The Dilemma There seems to be a consistent non physical bump around 4.5 GeV for all deformations applied to the Inner


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Neutrino Flux Nominal and Deformed

Nicholas Lira University of Texas Arlington DUNE Group July 20 2017

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The Dilemma

There seems to be a consistent non – physical bump around 4.5 GeV for all deformations applied to the Inner Conductor for the neutrino flux. This same deviation does not exist for the pions. The goal of this talk is to understand why this may be occurring for the neutrino flux.

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z Click to add text This is at only 5 micron deformation!!!

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Beamline Configuration 1

Version: v3r5p2

Jobs = 300

Protons on Target = 35,000 protons/job

10.5 million Protons on Target for every configuration

Target: Graphite Simple Cylindrical.

Target Radius: 5 mm

Target Length: 2 meters

Nominal Run

Eccentric: 5, 25, 50, 100, 200, 300, 400, 500 microns

Elliptic: 5, 25, 50, 100, 200, 300, 400, 500 microns

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Beamline Configuration 2

Version: v3r5p2

Jobs = 30

Protons on Target = 35,000 protons/job

1,05 million Protons on Target for every configuration

Target: Graphite Simple Cylindrical.

Target Radius: 5 mm

Target Length: 2 meters

Nominal Run

Eccentric: 5 microns

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Ratio – Eccentricity 5 microns over Nominal

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z Ratio - Nominal divided by Nominal 6

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z Ratio – Eccentricity 100 microns over

Eccentricity 5 microns

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z Ratio – Eccentricity 200 microns over

Eccentricity 5 microns

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z Ratio – Eccentricity 300 microns over

Eccentricity 5 microns

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z Ratio – Eccentricity 400 microns over

Eccentricity 5 microns

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z Ratio – Eccentricity 500 microns over

Eccentricity 5 microns

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zRatio – Eccentricity 5 microns over

Eccentricity 5 microns

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Ratio – Nominal microns over Eccentricity 5 microns

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z Ratio – Nominal over Eccentricity 500

microns

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…. Just in case you were wondering about Ellipticity....

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z Ratio – Ellipticity 5 microns over Nominal 16

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Conclusion

The neutrino flux bump occurring in the 4 – 5 GeV range does not immediately appear to be a fault in Root's processing, from my

  • perspective. As you can see, some reasonable observations can me
  • made. This leads me to believe there is an error in the source code or

in my eventRates.C file. Nevertheless, that would still be odd because we are seeing some acceptable results when comparing two macros running the same simulation. If Root is making a mistake in binning, I would need to understand exactly what mechanism is creating these contradictory results. On one hand, it is showing something very

  • reasonable. On the other, it has left us baffled.
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Appendix

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Ecce 5 ND

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Ecce 100 ND

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Ecce 300 ND

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Ecce 500 ND

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Elli 5 ND

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Elli 100 ND

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Elli 300 ND

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Elli 500 ND