LC Muon Detector Studies Overview

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LC Muon Detector Studies Overview

• (mostly recent prototype hardware development
  plans)
• Fermilab
• A. Bross, B. Choudhary, G. Fisk, K. Krempetz, A.
  Para, O. Prokovief, R. Stefanski
• University of California at Davis
• M. Tripathi, B. Holbrook, J. Lizarazo, Y. Bansal
• Northern Illinois University
• G. Blazey, A. Dychkant, D. Hedin, D.
  Chakraborty,G. Lima, A. Maciel, C. Milstene
• University of Notre Dame
• M. McKenna, M. Vigneault, B. Baumbaugh, M. Wayne
• Wayne State University
• P. Karchin, A. Gutierrez, R. Medipalli

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Fe Cross Section
Fe Thickness 10 cm Gap 5 cm
m
Steel Cross Section
5 cm
1.5 cm
4.45m
6.55m
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The Big Picture - Orientation

• Scintillator based muon system aims to do both
  muon identification via their penetration through
  the solenoid return yoke (gt 1.4m Fe) and the
  measurement of hadronic shower energy that
  escapes out the back of the Hcal. Our candidate
  geometry for the detector planes consists of
  scintillator strips with 1.2mm dia. WLS fiber
  that captures light and pipes it to multi-anode
  PMTs outside the return yoke Fe. The strips are
  oriented at 45o w.r.t. the beam axis to make
  alternating u and v planes with increasing
  radius.
• From measurements that MINOS has done we expect a
  m.i.p. will give
• 15 p.e. per hit.
• The expected hadronic energy resolution DEh/Eh
  1/vE, but this must be measured.
• Simulation studies show that muon ID is efficient
  using this prototype design and that in most
  cases the muons can be tracked back into Hcal.
• Over the past year, the universities who have
  joined the LC muon detector studies, have
  organized to embark on the development of
  prototype detector planes.

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50 GeV p- event 11 run 0 EyeFish View-18 hits in
Muon Detector
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Scintillator Layout and Strips
Scintillator 4.1 X 1 cm2 co-extruded strips
with 1 mm dia. WLS fiber and outer reflector of
TiO2.
U/V strips with wls shifted light exiting both
ends. Add left/right signals from clear fibers
with optical OR to provide one signal per strip.
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Prototype Module Layout
5.0 m
2.5m
43 full strips
43 short strips
3.6m (L) x 4.1cm (W) x 1cm (T)
3.6m gt 0m long
Read out both ends of full strips one end of
short strips (except the shortest 22). 2(43
21) fibers/side 128 channels 8 (1.2mm dia)
fibers/pix 16(4 x 4mm2) pixels gt
Equivalent of One MAPMT/prototype plane
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How many prototype planes strips?

• Each plane is the equivalent of 86 strips that
  are 3.6 m long. Each strip has a mass of 1.52 kg
  or 3.3 lbs.
• The weight of a plane (86 strips) is 131 kg or
  288 lbs. Order 15 extra scintillator 100
  strips per plane or 330 lbs (152kg).
• 3 u 3 v to over-constrain a straight line 6
  planes one spare to use for resolving multi-hit
  ambiguities. gt 7 planes.
• Total scintillator is 2,341 lbs (1.17T) or 700
  strips or 1.064 Tonnes.
• Scintillator Cost - MINOS paid 10/kg or
  10K/tonne. Assume a 50 addl cost for a small
  order
• 
  16K

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MINOS Hamamatsu H6568 Multi-anode PM16 anodes
ea. 4 x 4 mm2
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MINOS MAPMT with fiber guide
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Fiber quantities and costs

• WLS Fiber
• Buy enough to instrument every strip 100
  strips3.6m/strip 360 m times 8 planes (one to
  learn on).
• gt 2.88km
• Kuraray quote of 3.29m gt 9,475 plus shipping
  duty
• so add 1,500, which brings the total to
  11K WLS
• Clear Fiber
• From engineering drawing
• Short near strips 213.6 m 76m
• Full strips 43(3.6m 1.3m) 211m
• Short far strips 213.3m 69m
• Total
  356m gt 390m times 8 planes
• 
  3,120 m
• Clear cost 3.12km3.11K/km 9.7K 1.5K
  11.2K Clear

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Multi-anode Photomultipliers
16 channel multi-anode PM
16 anode PMs come in two varieties w/ or w/o
base. H8711-10 with base 1290.85 ea.
for 6 or more. R7600-00-M16 w/o base 1011.37
ea. for 6 or more. We will need at least 14
MAPMTs for RD 8 for the 7 planes 2 to
replace two loaner tubes (spares) 4 for bench
tests of electronics Procure 7 w/bases 7 w/o
bases. Cost 9,036 7,080 16,116
30mm
Hamamatsu H6568
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Other RD Items
Al skins (top and bottom) 150 lbs. _at_ 3/lb gt
450/plane 8 450 3,600 Epoxy
1000 Routing, connectors clear wave guides
Mitch Wayne Notre
Dame Calibration Scheme/Hardware Paul Karchin
Wayne State FE readout electronics Mani
Tripathi UC Davis Paul Karchin Wayne
State Cables, PS, Crates, Trigger, DAQ Mani
Tripathi UC Davis Testing QC for
scintillator/fiber Fermilab, NIU ND Cosmic
Ray Source tests at Fermilab All Beam Tests
Not yet planned
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Incomplete RD Cost Estimate
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Outlook

• We will order scintillator strips and fiber after
  appropriate review of our RD prototype design.
• There is effort on most RD topics, but not all
  e.g. multiplexing scheme needs study. With the
  scintillator extrusion machine in Lab 5 at
  Fermilab, there are a number of questions that
  could be investigated, some of which require
  event simulation studies, e.g. optimal strip
  width.
• We are making slow, but positive progress. Pace
  is largely dictated by money and manpower.
  Manpower needs to increase significantly for more
  rapid progress. University collaborators would
  do more with increased funding which, we hear,
  is, or will happen.
• Muon detector studies are at an interesting
  point, both with regard to software, such as muon
  identification, and hardware, such as prototype
  detector development.

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