July 14 2003 Cornell ALC Workshop G ene Fisk 1 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
15
Embed
July 14 2003Cornell ALC Workshop Gene Fisk1 LC Muon Detector Studies Overview (mostly recent prototype hardware development plans) Fermilab A. Bross, B.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
July 14 2003 Cornell ALC Workshop Gene Fisk 1
LC Muon Detector Studies Overview
(mostly recent prototype hardware development plans)
FermilabA. Bross, B. Choudhary, G. Fisk, K. Krempetz, A. Para, O. Prokovief, R. Stefanski
University of California at DavisM. Tripathi, B. Holbrook, J. Lizarazo, Y. Bansal
Northern Illinois UniversityG. Blazey, A. Dychkant, D. Hedin, D. Chakraborty,G. Lima, A. Maciel, C.
Milstene
University of Notre DameM. McKenna, M. Vigneault, B. Baumbaugh, M. Wayne
Wayne State UniversityP. Karchin, A. Gutierrez, R. Medipalli
July 14 2003 Cornell ALC Workshop Gene Fisk 2
Steel Cross Section
Steel Cross-section
4.45m
6.55m
Fe Thickness = 10 cm
Gap = 5 cm
Fe Cross Section
Gap View
5.95
6.15
2.4 2.6
1.5 cm
5 cm
July 14 2003 Cornell ALC Workshop Gene Fisk 3
The Big Picture - Orientation
• Scintillator based muon system aims to do both muon identification via their penetration through the solenoid return yoke (> 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 Eh/Eh~ 1/√E, 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.
July 14 2003 Cornell ALC Workshop Gene Fisk 4
50 GeV - event 11 run 0 EyeFish View-18 hits in Muon Detector
July 14 2003 Cornell ALC Workshop Gene Fisk 5
Strip Layout
0
0.5
1
1.5
2
2.5
3
0 1 2 3 4
meters
met
ers
Scintillator Layout and Strips
Scintillator: 4.1 X 1 cm2
co-extruded strips with1 mm dia. WLS fiber and outer reflector of TiO2.
U/V strips with wls shifted light exiting both ends. Add left/right signals fromclear fibers with optical OR to provideone signal per strip.
July 14 2003 Cornell ALC Workshop Gene Fisk 6
Prototype Module Layout
2.5m
5.0 m
43 full strips
3.6m (L) x 4.1cm (W) x 1cm (T) 43 short strips3.6m => 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 => Equivalent of One MAPMT/prototype plane
July 14 2003 Cornell ALC Workshop Gene Fisk 7
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. => 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% add’l cost for a small order:
$16K
July 14 2003 Cornell ALC Workshop Gene Fisk 8
MINOS Hamamatsu H6568 Multi-anode PM
16 anodes ea. 4 x 4 mm2
July 14 2003 Cornell ALC Workshop Gene Fisk 9
MINOS – MAPMT with fiber guide
July 14 2003 Cornell ALC Workshop Gene Fisk 10
Fiber quantities and costs• WLS Fiber
Buy enough to instrument every strip: 100 strips*3.6m/strip = 360 m times 8 planes (one to learn on).=> 2.88kmKuraray quote of $3.29m => $9,475 plus shipping & duty
so add $1,500, which brings the total to: $11K WLS• Clear Fiber
From engineering drawing:Short near strips: 21*3.6 m = 76mFull strips: 43*(3.6m +1.3m) = 211mShort far strips: 21*3.3m = 69m
Fiber connectors./Wave guidesCalibration scheme, light pulserPower supplies (LV & HV) PREP?Front-end & readout electonicsADC system (use existing eq., PREP)Trigger & DAQ system (old eq.)Test equipmentTest stand development (resuscitate Lab 3 w/some costs)
July 14 2003 Cornell ALC Workshop Gene Fisk 14
Outlook• We will order scintillator strips and fiber after appropriate
review of our R&D prototype design.
• There is effort on most R&D 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.