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Report from the

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14:45-15.05 Silicon Calorimetry Il Hon Park (Ewha Women's U) ... The position detector is used as a pre-shower detector. Etot=Eminical aEpreshower ... – PowerPoint PPT presentation

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Title: Report from the


1
Report from the World-Wide Calorimeter and
Forward Detector Project Day
G. Eigen, Bergen U/DESY
Analog HCAL Meeting, DESY 26-11-2003
2
Agenda of Worldwide Calorimeter Forward
Detector Project Day
TIME TITLE OF TALK
SPEAKER 1400-14.25
Status of GLC Calorimeter RD
Kiyotomo Kawagoe (Kobe
U.) 1425-14.45 Performance of a Strip Array
EM Calorimeter Hiroyuki
Matsunaga (Tsukuba U.) 1445-15.05 Silicon
Calorimetry
Il Hon Park (Ewha Women's
U) 1505-1525 Status of CALICE Si-W
Calorimeter Vaclav
Vrba (Prague) 1525-1535 Status of LCcal
RD
Stefano Miscetti (Frascati) 15.35-1555
Status of ECAL Activities in the US
David Strom
(Oregon) 1555-1620 Status of Analog HCAL
studies Erika
Garutti (DESY) 16.20-1645 Status of Digital
HCAL Activities
Jose Repond (Argonne) 1640-1705 Coffee break
17.05-1725 Analog HCAL Simulation Studies
Vassily Morgunov
(DESY) 17.25-1745 Simulation and Algorithm
Development for Digital HCAL Vishnu Zutshi
(NIU) 1745-18.00 Studies for Calorimeter
Prototypes and Schedule Volker
Korbel (DESY) 1800-18.15 Testbeam Plans

Steve Magill (Argonne) 1815-1835
Optimization of the Design of the Forward
Calorimeters Agnieszka Kowal (Krakov) 1835-1850
Hardware Status of Forward Calorimeters
Igor Emiliantchik (Minsk)
  • All talks are on the webpage
  • http//www-flc.desy.de/Calice-wwm/montpellier
    -agenda.html

3
ECAL
  • 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

4
Scintillator-Pb ECAL Configurations
Tiles WLS fibers
Sci strips WLS fibers
4cm x 4cm x 1mm-cell
Kiyotomo Kawagoe (Kobe U.)
5
Energy resolution (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/?E ? 0.2
Data 12.9/?E ? 0.
MC 11.8/?E ? 0.
Kiyotomo Kawagoe (Kobe U.)
6
Combined analysis of SHmax DESY Minical
  • The position detector is used as a pre-shower
    detector
  • EtotEminicalaEpreshower

Energy resolution
Very preliminary
Very preliminary
a
Kiyotomo Kawagoe (Kobe U.)
7
SHmaxMinical Energy Resolution/Linearity
  • Resolution/linearity with a0.56
  • Resolution was degraded by the large gap between
    detectors
  • Energy resolution agrees with Minical
    Measurements

Energy resolution
Very preliminary
Very preliminary
Electron energy (GeV)
Electron energy (GeV)
Kiyotomo Kawagoe (Kobe U.)
8
Spatial resolution
s 2.0 mm around shower max
Position resolution for 4GeV electron
Hiroyuki Matsunaga (Tsukuba U.)
9
Scintillator-W ECAL Design Plans
  • 45 layers 1.75 mm W
  • 2 mm scintillator (5?5 cm2)
  • 150 ?m Tyvek
  • 1 mm gap
  • Alternate layers are offset
  • Effective ?spatial 2.5?2.5 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)
10
HCAL
  • 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)

11
Tile-Fiber-Lightyield
Center/straight WLS-fiber
Diagonal/bent WLS-fiber
  • No stress on fiber,
  • Fiber end reflector
  • tile reflector
  • more stress on fiber,
  • fiber end reflector
  • tile reflector


L7.85cm
L7,85cm
L5cm
  • clear RO fibers
  • l1-3.5m to photodetector
  • light attenuation lt18
  • 1.4 mm drilled polished hole
  • in centre
  • For 5 cm straight WLS-fiber RO
  • Cheep, for Si PMs only
  • Single looped fiber
  • strong fiber bending,
  • most stress on fibers,
  • probably aging damages?

L20cm
Light yield of MIPs (used for calibration)
18-25 pe on photocathode
Volker Korbel (DESY)
12
Light Collection
Readout with Si PM
Readout with PM
11 p.e./MIP
Readout with APDs Hamamatsu S8550
Jose Repond (Argonne)
13
The MiniCal Structure
e 1-6 GeV
Layer configuration
0.1 cm Ø WLF
97 Shower contained
  • 1-loop fiber inserted
  • into groove
  • Single tiles covered
  • by 3M reflector

0.5 cm active
2 cm steel
Erika Garutti (DESY)
14
Silicon PM Calibration
  • 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

One photoelectron peak
MIP peak
LED
pedestal
1 MIP 25 pe.
Erika Garutti (DESY)
15
Energy Resolution
  • 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
Erika Garutti (DESY)
16
APD Beam Tests
LAL/ECAL preamp Charge sensitive Larger gain
Prague preamp Voltage sensitive
APD
s11 ch
s6 ch s23 ch
s13 ch

pedestal
Preamp required gain APD gain gt200 12
mV/7.2fC APD gain lt100 12 mV/1.8fC
Beam MIP
Erika Garutti (DESY)
17
Pre-amp Test of Single Tile with Source
Charge sensitive Minsk preamp Voltage
sensitive preamp Prague Design
ped
Sr MIP
Sr MIP
ped
LED
LED
  • Gate adjustment 90 signal contained
  • 300 ns
    120 ns
  • noise comparison s(ped)/(MIP-ped)
  • 5.0/85 0.06
    12.4/82 0.15
  • MIP resolution s(MIP)/(MIP-ped)
  • 36.4/85 0.42
    42.3/82 0.52
  • We have 2 additional preamp prototypes for
    testing

Erika Garutti (DESY)
18
HCAL Studies in Japan
  • Use 1-4 GeV e- beam at KEK,
  • 10-200 GeV at FNAL

(46.70.6)/?E
Kiyotomo Kawagoe (Kobe U.)
19
Simulations
20
Prototype Layout
Vassily Morgunov (DESY)
21
Neutron Component
Vassily Morgunov (DESY)
22
Software Compensation
Simple weighting
Vassily Morgunov (DESY)
23
Single Particle E Resolution
Non-projective geometry
Vishnu Zutshi (NIU)
24
Multiple thresholds
Vishnu Zutshi (NIU)
25
Reconstructed Jet Resolution
Reconstructed Z mass
60 better
?0.26
ZZ Events
Digital eflow
Cal only
?0.16
Vishnu Zutshi (NIU)
26
Prototypes Beam Tests
27
Example pad sizes increase x 2
3, 6 and 12 cm
20 16
26 10
30 6
Volker Korbel (DESY)
28
Physics prototype stack
  • Absorber plates
  • Metal sheet
  • EN 10 029-16D x 1005 x 1005 S G
  • Steel
  • Stahl EN 10 025-Fe 360 B
  • 36 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 gt0.5 mm

Volker Korbel (DESY)
29
Tile-HCAL P-PT for E-flow studies
  • Simulation studies needed to specify
  • Active volume
  • tile sizes vs depth
  • tile grouping to cells
  • lateral leakage
  • longitudinal leakage
  • increasing absorber thickness in depth?

10 GeV pions
100 cm
Leakage detector needed!
100 GeV pions
Volker Korbel (DESY)
30
Testbeam Venues
Steve Magill (Argonne)
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