Calorimetry

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Calorimetry muon/p-id summary
Dhiman Chakraborty Northern Illinois University
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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

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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 ?E 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

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ECal

• Si-W (OregonSLAC)
• Si-W-Scint (Kansas)
• Scint-W (Colorado)
• Crystal (IowaCaltech)
• Cerenkov-compensated (IowaFairfield)
• All analog

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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, 0.8?0
• 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

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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

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Crystal Cerenkov

• Cerenkov-compensated precision calorimetry
• Uses Cerenkov light to measure e,? ionization
  for hadrons, e combine the two
• Not much known

• Inexpensive
• Excellent E resol.
• (100 sampling)
• No longitudinal segmentation limitation to PFA?
• Still in early stage
• Extensive simulations needed and planned

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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
• 4?0, 6 sampling
• 1-10 cm2 cells

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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

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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

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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

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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

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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

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LC TB Goals and Organization

• Detector groups have made significant progress
• Individual detector groups have been working on
  TB efforts independently
• ECAL and HCAL testbeam performed already in
  Europe and Asia
• US Calorimeter group leading the effort
• Some documents for requirements exist e.g.
  Calorimeter group
• It is time for more systematic organization for a
  coherent effort for Test Beam
• Better if groups work together for preparing
  common needs
• One communication channel to outside ? Provides
  stronger arguments and accomplish better supports
• Provide focus to detector development efforts
• Information on available TB facilities compiled
• E. Ramberg from FNAL gave detailed status report
  on MTBF
• Need to collaborate with European and Asian
  colleagues

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Summary of TB Needs
H.E.Fisk
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• Kick-off LCTB group with the responsibilities
• Sets the goals and determines directions for
  coherent TB preparation for all detector groups
• Keep up with progress through regular meetings
• Sets priorities if conflict arises
• Represents LC TB efforts to outside and
  facilities
• Collaborate with European and Asian TB groups
• Discussion session had some 30 members
• Set action items for the next few months
• Setup communication (mail list, web page and
  meetings) by Sept., 2003
• Compile a TB requirement document that includes
  all detector groups, if possible, in all regions,
  by Jan meeting
• Contact the leaders of LCRD and UCLC for separate
  sections in the upcoming proposals Sept. 2003
• Complete the list of subgroup reps. Sept. 2003

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Subgroups
Groups Rep.
Cal Repond/Magill
TRK D. Karlen
MUO Fisk will take to the group
Beam Monitoring M. Woods will work on the document
Beam-line Will recruit later
Trigger/DAQ Will recruit later
Facility Infrastructure Will recruit later
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Muon PID Summary

• 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.

• 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
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Muon PID Summary (cont.)

• C. Milstene NIU Muon ID Software Development
• Resurrection of m code.
• Verification of M. Piccolos 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.

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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

Plateau curve
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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