calorimetry + muon/p-id summary
DESCRIPTION
Calorimetry + muon/p-id summary. Dhiman Chakraborty Northern Illinois University. Calorimetry. Performance goals Electromagnetic Calorimetry (ECal) Hadronic Calorimetry (HCal) Digital Analog Particle-flow algorithms (formerly energy-flow) Simulations - PowerPoint PPT PresentationTRANSCRIPT
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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Calorimetry• Performance goals• Electromagnetic Calorimetry (ECal)• Hadronic Calorimetry (HCal)
– Digital– Analog
• Particle-flow algorithms (formerly energy-flow)– Simulations– Particle identification (Digi/Ana)
• Test Beam
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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Performance goals• Jet energy measurement precise
enough to separate Ws and Zs in hadronic decays on an event-by-event basis: ΔE = 0.3 sqrt(E [GeV])
• Use track momenta for charged clusters; cal only for for neutrals: particle-flow algorithms
• Identify non-pointing neutral clusters
• Excellent hermeticity
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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ECal
• Si-W (Oregon+SLAC)• Si-W-Scint (Kansas)• Scint-W (Colorado)• Crystal (Iowa+Caltech)• Cerenkov-compensated
(Iowa+Fairfield)All analog
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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Si-W ECal• 0.5 cm x 0.5 cm• 0.3 mm Si • 3.5 mm/layer• 30 layers
• Rin = ~142 cm
• Zmax = 2.1m
• 20X0, 0.8λ0
• Sampling ~2%• 5T field
• Small Rm and fine segmentation aids PFAs
• Europe on board• Design well under way• Electronics rough draft
complete• Mechanical conceptual
design started.• Tests, more
simulations in the offing
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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Si-W-Scint. & Scint.-W• More affordable than Si-W• Somewhat coarser segmentation –
limited by fiber routing• Fine sampling and timing• Efficiency and uniformity need to be
established – gang 3-5 tiles• Choice of photodet, fiber coupling …• Europe, Asia on board on scint. option • Detailed simulation studies in progress
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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Crystal Cerenkov
• Inexpensive• Excellent E resol.(100% sampling)• No longitudinal
segmentation – limitation to PFA?
• Still in early stage• Extensive
simulations needed and planned
• Cerenkov-compensated precision calorimetry
• Uses Cerenkov light to measure e,γ; ionization for hadrons, e – combine the two
• Not much known
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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HCal• RPC – Digital (ANL, U. Chicago, Boston,
FNAL)• Scintillator – Digital (?) (NIU, UIC)• GEM – Digital (U Texas - Arlington)• Scintillator – Analog (Colorado)
• ~34 layers, ~3.5 cm thick w/ 2.5 cm thick stainless steel or similar absorber
• ~ 4λ0, ~6% sampling • 1-10 cm2 cells
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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RPC DHCal• Multiple gas gaps, glass substrate,
graphite/ink resistive layer
• Avalanche mode operation
• Prototypes constructed, electronics, DAQ in place, initial studies are very encouraging
• Extensive testing, readout chip design in progress
• Backed by detailed simulation
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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Scintillator DHCal• Proven technology
• Somewhat larger cells
• Cheap production by in-house extrusion
• MANY options for fiber routing, surface treatment, groove shape, transducer tested with encouraging results
• Cosmic ray prototype stack ~ready
• Bolstered by extensive simulation
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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GEM DHCal• New technology
• Double-gap
• First prototype w/electronics assembled, operational
• Initial tests with CR, source at par with results shown by developers
• Multichannel prototypes under construction
• Backed up by extensive simulation
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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Scint. HCal (analog)
• Similar to Scint DHCal, but ~2.5 times larger tiles
• Improve lateral resolution by staggering
• Cell prototyping done
• Stack prototype next
• Simulation studies in progress
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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Particle-flow algorithms• Several calorimeter groups are
deeply involved in simulation and software development as well as PFA development (NIU, ANL, Colorado, UTA, …)
• First jet reconstruction results are most encouraging, prompting us to more realistic simulations and sophisticated reco algorithms
• Much effort invested
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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R. Wilson – CSU: Particle ID Software Infrastructure Embedding PID in the overall LCD/JAS s/w infrastructure?
Fast Simulation/Reconstruction : dE/dx tool; code checks; muon fast simulation.
Cross subsystem PID.
Muon & PID Summary
A. Maciel – NIU: Simulation Software Development
Extension of generalized and universal simulation
framework – new worldwide effort.
Planar muon detector example with 45o strips.
Big advance! u vs. v for 2 tracks
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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Muon & PID Summary (cont.)
C. Milstene – NIU: Muon ID Software Development
Resurrection of code.
Verification of M. Piccolo’s muon ID
for single particles and b-b events.
G. Fisk – Fermilab: Scintillator Muon Detector
Prototype Planes: Description
General description of scintillator strip layout.
M. Wayne – UND: Fiber Connections & Routing
Discussion of fiber associated with bringing the WLS light out of the scintillator strips and onto a multi-anode photomultiplier.
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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Muon & PID Summary (cont.)
P. Karchin – WSU: MAPMT Readout and Calibration Issues
Test results on Hamamatsu M-16 multi-anode PMT. Calibration ideas.
R. Wilson – CSU Geiger Photodiode Array Readout Test
Description of tests performed on prototype APD (avalanche photo-diode).
M. Piccolo – INFN RPC Prototype Design Issues First test results for new glass RPCs.
Rate capability studies
Test Beam at Frascati
Plateaucurve
Dhiman Chakraborty Calorimetry + muon/p-id summary LC workshop, Cornell, 16 July, '03
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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