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Vishnu V. Zutshi for NIU/NICADD Tail-catcher/Muon System 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

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vishnu v zutshi for niu nicadd
Vishnu V. Zutshi

for

NIU/NICADD

tail catcher muon system
Tail-catcher/Muon System

V. Zutshi, ICLC04, Paris

goals for the tc muon system
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

V. Zutshi, ICLC04, Paris

on tail catching

For charged pions with >5% of E inside TC

On tail-catching

10cm absorber plates

V. Zutshi, ICLC04, Paris

accounting for material in the coil
Accounting for material in the coil...

135%/sqrt(E)

V. Zutshi, ICLC04, Paris

e rec e gen 50 gev p
Erec/Egen 50 GeV p

V. Zutshi, ICLC04, Paris

fake jets
Fake Jets
  • Needed to judge the hit occupancy near the muon track
  • B*  B + p(35GeV)

| D* + m(15GeV)

| p(20GeV)+K(15GeV)+p(10GeV)

  • Particles are produced in 0.05 cone individually and G4 simulated hits are combined in the analysis program

V. Zutshi, ICLC04, Paris

fake jet angular width dr 0 05
Fake Jet Angular Width (dR = 0.05)

TC view

ECal view

V. Zutshi, ICLC04, Paris

s x w r t previous layer
s(X) w.r.t. previous layer

V. Zutshi, ICLC04, Paris

stripification
Stripification
  • Assign tail-catcher hits to strips of a given size in analysis software
  • Obtain x or a y co-ordinate from alternate lyrs
  • Take all combinations
  • Efficiency is defined as the ratio of the no. of times a pairwise muon hit is found within a road in lyrs N+1 and N+2 when it was present in N and N+1
  • Rejection = 1-p where p is the fraction of times a non-muon hit combination was present in the road

V. Zutshi, ICLC04, Paris

rejection

1cm wide strips

‘Rejection’

V. Zutshi, ICLC04, Paris

pairwise efficiency14
Pairwise ‘Efficiency’

V. Zutshi, ICLC04, Paris

for 99 efficiency
For >99% efficiency….

V. Zutshi, ICLC04, Paris

current guess
Current Guess
  • “Fine” section (8 layers)

2cm Steel, 0.5 cm thick scintillator

  • Following “coarse” section (8 layers)

10cm Steel, 0.5 cm scintillator

  • 5cm wide strips, 1m long
  • Tyvek wrapping
  • Alternating x-y orientation
  • Si-PM photo-detection

V. Zutshi, ICLC04, Paris

first measurements
First Measurements

V. Zutshi, ICLC04, Paris

uniformity
Uniformity

V. Zutshi, ICLC04, Paris

separation grooves

Provides better rigidity

Separation Grooves

1

2

3

4

5

Epoxy/paint mixture

V. Zutshi, ICLC04, Paris

response
Response

V. Zutshi, ICLC04, Paris

x talk
X-talk

V. Zutshi, ICLC04, Paris

response and strip fabrication
Response and Strip Fabrication

V. Zutshi, ICLC04, Paris

uniformity scan
Uniformity Scan

V. Zutshi, ICLC04, Paris

strips wrapped in tyvek

Each strip wrapped in 2 layers of Tyvek

Strips Wrapped in Tyvek

Compare to separation groove

V. Zutshi, ICLC04, Paris

slide26

Signal amplitude

S/N

Noise amplitude

MRS

Si-PM

V. Zutshi, ICLC04, Paris

strip light yield

15 p.e.

Strip Light Yield

V. Zutshi, ICLC04, Paris

summary
Summary
  • 5mm thick Fermi-NICADD produced extruded strips used in combination with Si-PM/MRS adequate for tail-catcher/muon tracker.
  • Strip-fiber configuration nearly finalized.
  • Putting together mechanical module to understand and resolve assembly issues.
  • Talking with Fermi for cart design and construction.

V. Zutshi, ICLC04, Paris