A Look into Far Detector Photon Rates Caroline Zhang Calibration - - PowerPoint PPT Presentation

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a look into far detector photon rates
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A Look into Far Detector Photon Rates Caroline Zhang Calibration - - PowerPoint PPT Presentation

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A Look into Far Detector Photon Rates Caroline Zhang Calibration Consortium Meeting March 9, 2019 You Inst Logo Content Motivation - Estimate the effect of Ar scintillation light on photo-electric targets in order to understand the

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A Look into Far Detector Photon Rates

Caroline Zhang Calibration Consortium Meeting March 9, 2019

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Content

  • Motivation
  • Estimate the effect of Ar scintillation light on photo-electric targets in
  • rder to understand the suitability of electron calibration using

photo-electric effect

  • DUNE Geometries
  • PD Area Calculation
  • Monte Carlo Sample Analysis
  • Results
  • Questions and Feedback

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DUNE Geometries and Coordinates

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  • Entire FD
  • 1x2x6

Dimension units cm

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Workspace Definition in Geometry GDML Files

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Definitions of 1x2x6 Geometry in the GDML Files

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Photon Bars on APA

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  • Each APA has 10 Photon Bars and
  • there are 1x2x6=12 APAs
  • meaning 120 Photon bars
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Photon Bars on APA

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PD bars

  • J. Stewart
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Mapping Channel locations

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.gdml .txt/chart

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Current PD Simulation only has1x2x6 Analyzed all the 100 events I have

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Photon Counts of 100 events x 120 channels/event

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The mean of Photon Hits per channel per event is 540.4

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Sum 100 events for each channel (120 total)

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Photons counts with Attenuation Effect Removed

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The average attenuation is 0.4642

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Calculate PD bar area from the gdml file

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meaning:

  • Paddle_y = 4x2.54 = 10.16 cm
  • APAFrame_z = 230.0025 cm
  • Paddle_z = 230.0025 – 2x4x2.54
  • =209.6825cm
  • Paddle_Area= Paddle y x z =

2130.3742 cm^2

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Photon Rate Calculation

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The length of the time window per event :

4.492 ms

Mean: 1162 Maximum: 2000 Center of the 3rd peak :1400 The average photon rates is therefore 0.146 photons per cm^2 per ms

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Photon Counts (N) across the entire APA Plate

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Dimension units cm

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Distribution of Photon Rates across Y/Z of APA Plate

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Dimension units cm

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Next Step

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  • Think about optimization for electron source metal location and area

Any Ideas and Questions?

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References

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  • Sample location

dune/data/users/ahimmel/2019-02-07-gallery Mahalos