Transcript Document

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
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
2
Performance goals
• Jet energy measurement precise
enough to separate Ws and Zs in
hadronic decays on an event-byevent 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
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
3
ECal
•
•
•
•
•
Si-W (Oregon+SLAC)
Si-W-Scint (Kansas)
Scint-W (Colorado)
Crystal (Iowa+Caltech)
Cerenkov-compensated
(Iowa+Fairfield)
All analog
Dhiman Chakraborty
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
4
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
Dhiman Chakraborty
• 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
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
5
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
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
6
Crystal
Cerenkov
• Cerenkov• Inexpensive
compensated
• Excellent E resol.
precision
(100% sampling)
calorimetry
• No longitudinal
• Uses Cerenkov light
segmentation –
limitation to PFA?
to measure e,γ;
ionization for
• Still in early stage
hadrons, e –
• Extensive
combine the two
simulations needed
and planned
• Not much known
Dhiman Chakraborty
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
7
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
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
8
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
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
9
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
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
10
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
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
11
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
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
12
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
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
13
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
Dhiman Chakraborty
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
14
Summary of TB Needs
Dhiman Chakraborty
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
H.E.Fisk
15
• 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
Dhiman Chakraborty
16
• Complete theCal+mu+p-id+test-beam
list of subgroupsummary
reps.: Sept. 2003
LC workshop, Cornell, 16 July, '03
Subgroups
Groups
Cal
TRK
MUO
Beam Monitoring
Beam-line
Trigger/DAQ
Facility Infrastructure
Dhiman Chakraborty
Rep.
Repond/Magill
D. Karlen
Fisk will take to the
group…
M. Woods will work on the
document
Will recruit later
Will recruit later
Will recruit later
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
17
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!
Dhiman Chakraborty
u vs. v for 2 tracks
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
18
Muon & PID Summary (cont.)
C. Milstene – NIU: Muon ID Software Development
 Resurrection of m 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
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
19
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 photodiode).
M. Piccolo – INFN RPC Prototype Design Issues
Plateau
 First test results for new glass RPCs. curve
 Rate capability studies
 Test Beam at Frascati
Dhiman Chakraborty
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
20
Prototype Module Layout
5.0 m
2.5m
43 full strips
43 short strips
3.6m => 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
3.6m (L) x 4.1cm (W) x 1cm (T)
Dhiman Chakraborty
Cal+mu+p-id+test-beam summary
LC workshop, Cornell, 16 July, '03
21