26-11-03, DESY HCAL meetingG. Eigen, U Bergen/DESY2 Agenda of Worldwide Calorimeter & Forward...

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


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


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.)


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.%



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



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



Spatial Spatial resolutionresolution

= 2.0 mm around shower max

Position resolution for 4GeV electron

Hiroyuki Matsunaga (Tsukuba U.)


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)


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)


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)


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)


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



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+



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



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


We have 2 additional preamp prototypes for testingWe have 2 additional preamp prototypes for testing


(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



SimulatioSimulationsns


Prototype LayoutPrototype Layout

Vassily Morgunov (DESY)


Neutron ComponentNeutron Component



Software Software CompensationCompensation


Simple Simple weightingweighting


Single Particle E Single Particle E ResolutionResolution

Non-projective geom

etry

Vishnu Zutshi (NIU)


Multiple Multiple thresholdsthresholds

Vishnu Zutshi (NIU)


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


PrototypesPrototypes&&

Beam TestsBeam Tests


Example: pad sizes increase x 2Example: pad sizes increase x 2 3, 6 and 12 cm


20201616

26261010

303066


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



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?



Testbeam Testbeam VenuesVenues

Steve Magill (Argonne)

26-11-03, DESY HCAL meetingG. Eigen, U Bergen/DESY2 Agenda of Worldwide Calorimeter & Forward...

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