Baseline Optimization Studies

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Baseline Optimization Studies

• D. Reyna
• Argonne National Lab

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Some Basic Questions

• Does sensitivity to ?13 survive under complete 3
  flavor mixing?
• How can we best use all of the information in the
  energy spectrum?
• What are the optimal locations for 2 identical
  detectors?
• Bottom line Can we achieve the desired
  sensitivity?

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Independence of ?m2
solar
atmospheric
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Total Rate vs. Baseline
E? 3.5 MeV
Full Reactor Spectrum
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Shape Comparison
Make ?2 Comparison Of Distributions
100 m
1 km

• Each bin normalized to total at that location
• Errors are statistical only

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?2 Comparisons
Combined

• Assumes Identical Detectors
• More Statistical Power

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Optimizing 2 Locations

• 2 Identical Detectors
• Fix 1 Detector Baseline
• Sweep the Other

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Optimizing 2 Locations (contd)
100m
1km
500m
1.5km
2km
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Statistical Power of Combined ?2 Test
Combined (stat only) Combined ( 1 sys) Shape
Only (stat only) Shape Only ( 1 sys)
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Secondary Maxima?
Combined (stat only) Combined ( 1 sys) Shape
Only (stat only) Shape Only ( 1 sys)
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90 Confidence Limits
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Short and Long Solutions
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Final Thoughts

• It is possible to get the desired sensitivity
• Optimal near detector location should be as close
  as possible
• A Detector should be at the first oscillation
  minimum (900 1400m)
• A farther location (2.5km) yields almost as much
  statistical power
• Could be effective if a very near detector is not
  possible
• Possible 3rd detector?