TailCatcherMuon Tracker Prototype

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Tail-Catcher/Muon Tracker Prototype

• Vishnu V. Zutshi
• for
• NIU/NICADD

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Goals for the TC/Muon System

• Provide a reasonable snapshot of the tail-end of
  the shower for simulation validation
• Prototype detector with high-fidelity to what is
  imagined for a generic LCD
• correcting for leakage
• understanding the impact of coil
• muon reconstruction eflow
• fake rate

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Leakage
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Shower Depth
Shower depth dependent sampling weights (least
squares minimization) are calculated with and
without tail-catcher energy. Weights for layers
get progressively frozen.
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Erec/Egen 50 GeV p?
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Single particle E Resolution
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E correlation (with coil)
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Multiple Scattering
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50 GeV p
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HCal Table
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HCal TCMT
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lt90gt Containment
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Rotations
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Design Elements

• Fine section (8 layers)
• 2cm thick steel
• Coarse section (8 layers)
• 10cm thick steel
• 5mm thick, 5cm wide strips
• Tyvek/VM2000 wrapping
• Alternating x-y orientation
• Si-PM photo detection
• Common readout with HCal

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Fermi-NICADD Extruder
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Die
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Bulk LY

• BC404 3.25 ? 0.22
• BC408 2.70 ? 0.15
• F-NICADD 2.01 ? 0.30 (66 of BC408)
• averaged over 10 samples

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Separation Grooves
Provides better rigidity
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Epoxy/paint mixture
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Strips
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X-talk
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Glue?
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Grooving
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Response
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Uniformity (Grooves)
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Uniformity (small holes)
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Longitudinal Scan
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Cassette I
1mm thick steel walls
LEDs sit here
Electronics sit here
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Cassette II
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Cassette III
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LED
Stability studies underway
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Absorber and Cart

• Good quality steel plates from Fermi scrap
  available (0.75 and 4 inches thick).
• Maximum size for the thicker plates is 1.066m x
  1.2m.
• Cart being designed with about 10 tonne load
  capacity.
• Will have the capability for forward-backward and
  left-right motion.

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Quality Control I

• Hole Tolerance
• Width and thickness measurements
• Dopant presence
• Attenuation length measurements
• Longitudinal and horizontal scans

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Quality Control II
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Quality Control III
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Summary

• Strip-fiber RD essentially done, we are entering
  construction phase.
• All the scintillator required for the device has
  been produced.
• Mechanical prototype cassette assembled.
• Hope to have the first fully instrumented layer
  readout before year-end.