MINOS and Me D. Jason Koskinen

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MINOS and MeD. Jason Koskinen
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CalDet

• Goal is to understand Detector Effects
• Get calibration between Near and Far detector
  responses to same particle events
• A CalDet effect that has not been analyzed is the
  light output dependence of the scintillator as a
  function of temperature
• Near/Far Detector have consistent temperature
• CalDet runs in the PS at CERN which has
  fluctuation 10 oC

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Temperature Calibration

• First runs at the CalDet used only a RadioShack
  probe
• Summer 2003 Thermocouple probes were added

RS Probe
Added temp probes
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Necessity for Corrections

• There is a .3/ oC change in light output from
  scintillator
• Oscillation parameters are dependent on energy,
  so proper energy resolution for events is
  required
• CalDet goal is to get calibration to 1
• Take multiple runs w/ 1 GeV beam at CalDet while
  recording temperature with probes
• With thermocouple temp Data get a handle on
  temperature corrections for previous data taken
  with only RS probe

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Particle Detection
Death Star creating consistent energy particle
beams
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1 Day
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• Temperatures plotted over 1 day
• Probe 15 slope m1.4824
• Probe 16 slope m1.5910
• Ideally m1

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Getting There...

• A repeated 1 GeV run was taken over 5 days
• Histograms of the 5 slopes (from each day) from 3
  probes
• Probe 15 - 1.5305 /- .0879 Probe 16 - 1.6248 /-
  .0675 Probe 17 - 1.8179 /- .1262

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Future Work

• Electron neutrino analysis
• 1-2 of muon neutrinos will oscillate to electron
  neutrinos
• Examine ?13 from electron neutrino events
• Difficulties
• Non-pure beam of muon neutrinos
• Low event rate
• Code-monkey skills are currently low