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26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 2
Agenda of Worldwide Calorimeter Agenda of Worldwide Calorimeter &&
Forward Detector Project Day Forward Detector Project Day
TIME TITLE OF TALK SPEAKER14:00-14.25 Status of GLC Calorimeter R&D Kiyotomo Kawagoe (Kobe U.)14:25-14.45 Performance of a Strip Array EM Calorimeter Hiroyuki Matsunaga (Tsukuba U.)14:45-15.05 Silicon Calorimetry Il Hon Park (Ewha Women's U)15:05-15:25 Status of CALICE Si-W Calorimeter Vaclav Vrba (Prague)15:25-15:35 Status of LCcal R&D Stefano Miscetti (Frascati)15.35-15:55 Status of ECAL Activities in the US David Strom (Oregon)15:55-16:20 Status of Analog HCAL studies Erika Garutti (DESY)16.20-16:45 Status of Digital HCAL Activities Jose Repond (Argonne)16:40-17:05 Coffee break 17.05-17:25 Analog HCAL Simulation Studies Vassily Morgunov (DESY)17.25-17:45 Simulation and Algorithm Development for Digital HCAL Vishnu Zutshi (NIU)17:45-18.00 Studies for Calorimeter Prototypes and Schedule Volker Korbel (DESY)18:00-18.15 Testbeam Plans Steve Magill (Argonne)18:15-18:35 Optimization of the Design of the Forward Calorimeters Agnieszka Kowal (Krakov)18:35-18:50 Hardware Status of Forward Calorimeters Igor Emiliantchik (Minsk)
All talks are on the webpage All talks are on the webpage http://www-flc.desyhttp://www-flc.desy.de/Calice-wwm/montpellier-agenda.html.de/Calice-wwm/montpellier-agenda.html
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 3
ECALECAL Scin Tile/Pb sandwich Analog KEK, Japanese U Scin Strips/Pb sandwich Analog KEK, Japanese U Si pixel/W sandwich Analog “CALICE”, “SD” Oregon Scin Tile/W sandwich Analog offset layers Colorado Si-Scin hybrid /W Analog “LCCAL”, Kansas Dense Crystals Analog PbWO4 Caltech, Iowa
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 4
Scintillator-Pb ECAL ConfigurationsScintillator-Pb ECAL Configurations
4cm x 4cm x 1mm-cell
Tiles +WLS fibersTiles +WLS fibersSci strips +WLS fibersSci strips +WLS fibers
Kiyotomo Kawagoe (Kobe U.)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 5
Energy resolution Energy resolution (EMC)(EMC)
4mm-Pb/1mm-Sci (ZEUS type): 15.4%/sqrt(E)+0.2% (1994) 4mm-Pb/4mm-Sci (Strip-array): 12.9%/sqrt(E)+0% (2002) 4mm-Pb/1mm-Sci/1mm-Acryl (Tile/fiber): to be tested in March
2004
Strip-array EMC
ZEUS type EMC
15.4%/15.4%/E E 0.2% 0.2%
Data: 12.9%/Data: 12.9%/E E 0.% 0.%
MC: 11.8%/MC: 11.8%/E E 0.% 0.%
Kiyotomo Kawagoe (Kobe U.)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 6
Combined analysis of SHmax & DESY Combined analysis of SHmax & DESY MinicalMinical
The position detector is used as a pre-shower detector
Etot=Eminical+Epreshower
Very
prel
imin
ary
Very
prel
imin
ary
Energ
y r
eso
luti
on
Kiyotomo Kawagoe (Kobe U.)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 7
SHmax+Minical: Energy SHmax+Minical: Energy Resolution/LinearityResolution/Linearity
Resolution/linearity with =0.56
Resolution was degraded by the large gap between detectors
Energy resolution agrees with Minical Measurements
Very
prel
imin
ary
Very
prel
imin
ary
Electron energy (GeV) Electron energy (GeV)
Energ
y r
eso
luti
on
Kiyotomo Kawagoe (Kobe U.)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 8
Spatial Spatial resolutionresolution
= 2.0 mm around shower max
Position resolution for 4GeV electron
Hiroyuki Matsunaga (Tsukuba U.)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 9
Scintillator-W ECAL Design & Scintillator-W ECAL Design & Plans Plans
45 layers: 1.75 mm W 2 mm scintillator (55 cm2) 150 m Tyvek 1 mm gap Alternate layers are offset Effective spatial =2.52.5 cm2
R & D plans Light collection efficiency, uniformity Find cost-effective construction method Explore extruded scintillator Check energy flow with offset ght detection options
(APD,
David Strom (Oregon)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 10
HCALHCAL Scin Strips-fiber/Pb Analog Japan Scin Tile/SS sandwich Analog CALICE Tile CAL”, ACFA Scin “pixels”/SS Digital 9 cm2 hexagonal tiles NIU RPC/SS Digital 1 cm X 1 cm pads (many) GEM/SS Digital 1 cm X 1 cm pads (UTA)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 11
Single looped fiber strong fiber bending, most stress on fibers, probably aging damages?
Center/straight WLS-fiber Diagonal/bent WLS-fiber
No stress on fiber, Fiber end reflector =tile reflector
L=7,85cmL=5cm
L=20cm
1.4 mm drilled & polished hole in centre For 5 cm straight WLS-fiber RO Cheep, for Si PM’s only
more stress on fiber, fiber end reflector =tile reflectorL=7.85cm
clear RO fibers:•l=1-3.5m to photodetector •light attenuation <18%
Light yield of MIP’s (used for calibration): 18-25 pe on photocathode
Tile-Fiber-LightyieldTile-Fiber-Lightyield
Volker Korbel (DESY)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 12
Readout with PM
Ru106, Si-PMT, 51 Volts, ~6 PE
0
100
200
300
400
500
600
700
800
900
1000
1 56 111 166 221 276 331 386 441 496 551 606 661 716 771 826 881 936ADC CHANNEL
MEPHI sample, Courtesy of B.Dolgoshein
~ 11 p.e./MIP
Readout with APDs: Hamamatsu S8550
Light CollectionLight Collection Readout with Si PM
Jose Repond (Argonne)
The MiniCal The MiniCal Structure Structure
97% Showercontained
e+ 1-6 GeV
2 cm steel
0.5 cm active
0.1 cm Ø WLF
1-loop fiber inserted into groove
Single tiles covered by 3M reflector
Layer configurationLayer configuration
Erika Garutti (DESY)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 14
Silicon PM CalibrationSilicon PM Calibration
One photoelectron peak MIP peak
pedestal
Cosmic and beam calibration of all tiles w/o pre-amplifier reproducibility studies (LPI) calibration analysis (MEPHI)
Single photoelectron peak visible with fast pre-amplifier for calibration only
1 MIP = 25 pe.1 MIP = 25 pe.
LED
Erika Garutti (DESY)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 15
Energy Energy ResolutionResolution
good agreement for PM & SiPM systematic uncertainty needs to be determined (fix at 5%) SiPM is not corrected for saturation effects
Fit function:
Fit values for PM / MC a = 0.1 0.2 / 0.4 0.1 b = 21.0 0.4 / 17. 1 0.1
Preliminary E
ba+
Erika Garutti (DESY)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 16
APD Beam TestsAPD Beam Tests
~11 ch ~6 ch
~23 ch ~13 ch
LAL/ECAL preampCharge sensitive Larger gain
Prague preamp Voltage sensitive
pedest
al
Beam
MI P
APD
Preamp required gain :
APD gain >200: 12 mV/7.2fC
APD gain <100: 12 mV/1.8fC
Erika Garutti (DESY)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 17
Pre-amp Test of Single Tile with Pre-amp Test of Single Tile with SourceSource
Gate adjustment : 90% signal contained 300 ns 120 ns
noise comparison: (ped)/(MIP-ped) 5.0/85 = 0.06 12.4/82 = 0.15
MIP resolution: (MIP)/(MIP-ped) 36.4/85 = 0.42 42.3/82 = 0.52
Sr MIP
LED
ped
Charge sensitive Minsk preamp Voltage sensitive preamp Prague Design
Sr MIP
LED
ped
Erika Garutti (DESY)
We have 2 additional preamp prototypes for testingWe have 2 additional preamp prototypes for testing
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 18
(46.7±0.6)/(46.7±0.6)/E%E%
HCAL Studies in HCAL Studies in JapanJapan
Use 1-4 GeV eUse 1-4 GeV e-- beam at KEK, beam at KEK, 10-200 GeV at FNAL10-200 GeV at FNAL
Kiyotomo Kawagoe (Kobe U.)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 20
Prototype LayoutPrototype Layout
Vassily Morgunov (DESY)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 21
Neutron ComponentNeutron Component
Vassily Morgunov (DESY)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 22
Software Software CompensationCompensation
Vassily Morgunov (DESY)
Simple Simple weightingweighting
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 23
Single Particle E Single Particle E ResolutionResolution
Non-projective geom
etry
Vishnu Zutshi (NIU)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 24
Multiple Multiple thresholdsthresholds
Vishnu Zutshi (NIU)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 25
Reconstructed Jet ResolutionReconstructed Jet Resolution
Cal only Digital eflow
60% better
ZZ
Events
Vishnu Zutshi (NIU)
Reconstructed Z massReconstructed Z mass
=0.26=0.26
=0.16=0.16
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 27
Example: pad sizes increase x 2Example: pad sizes increase x 2 3, 6 and 12 cm
Volker Korbel (DESY)
20201616
26261010
303066
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 28
Physics prototype Physics prototype stackstack Absorber plates:
Metal sheet:EN 10 029-16D x 1005 x 1005 S GSteel: Stahl EN 10 025-Fe 360 B36 layers, Fe,
•16 +/- 0.95 mm, •flatness 3 mm•cut to 100x100 cm2
Cassettes:-Housing plates provided by producer of cassettes-Sandwich structure:
•6.5 mm scintillator + fibers•6.5 mm is max also for other detector layers•2 x 2 mm cover plates, +/- 0.95•100 x100 cm outer dimensions•Thickness tolerances >0.5 mm
Cassette weight ~32 kgtotal Physics prototype weight ~6 t
Volker Korbel (DESY)
26-11-03, DESY HCAL meeting G. Eigen, U Bergen/DESY 29
Tile-HCAL P-PT for E-flow studiesTile-HCAL P-PT for E-flow studies
10 GeV pions
100 GeV pions
100 cm
Leakagedetector needed!
Simulation studies needed to specifySimulation studies needed to specify Active volume tile sizes vs depth tile grouping to cells lateral leakage longitudinal leakage increasing absorber thickness in depth?
Volker Korbel (DESY)