dhiman chakrabortycal+mu+p-id+test-beam summary lc workshop, cornell, 16 july, '03 2...

Dhiman Chakraborty Cal+mu+p-id+test-beam 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


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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


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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


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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


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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

• 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


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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


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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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SubgroupsGroups 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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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


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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.


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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


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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

dhiman chakrabortycal+mu+p-id+test-beam summary lc workshop, cornell, 16 july, '03 2...

Documents

analog slide

progress slide

offing slide

known slide

extensive simulation

siw ecal

detailed simulation

thick w