BARREL CMS/ECAL CONSTRUCTION

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BARREL CMS/ECAL CONSTRUCTION AND QUALITY
CONTROL E. Auffray on behalf of ECAL
collaboration
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(No Transcript)
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BARREL ECAL DISTRIBUTED PROJECT
Alveola LPNHE
Ferrule Holder Saclay
Russia BCTP
Tablet LPNHE/ETHZ
CERN ETHZ Lisbon LPNHE
Monitoring Caltech Saclay
Japan Hamamatsu
Basket grid
Electronic INP Lyon Princeton ETHZ
2 Regional Centers - CERN - INFN/ENEA
APD /Capsules MINNEUPSI INP Lyon
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ECAL Quality Control Organisation

• Each component is equipped with a unique
  bar-coded label
• A strict quality control is imposed for each
  individual part (Crystals, APDs, Capsules,
  Tablets, Alveola)
• For each step of the assembly a detailed
  assembly procedure has been defined which has to
  be validated step by step by the operator
• Each assembly step is validated by a test
• ?
• A quality system management has been developed
• CRISTAL system

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Quality Assurance CRISTAL software
Assembly procedure in CRISTAL
Parts Composition
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Role of Regional Centre
Crystal Quality Control
Assembly
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Crystal Reception
Crystal identification
Crystal unpacking
Crystal registration Visual inspection
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Crystal quality Control
INFN/ENEA Rome
CERN/labo27

• Automatic control of
• Dimensions
• Transmission (radiation hardness)
• Light yield and uniformity

Capacity of 60 crystals/day
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ACCOS Dimension measurements

• CERN and Rome similar instruments, same protocol
  
• 3D measurement with a commercial machine

CERN
Rome
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ACCOS Transmission
CERN and Rome different approach

• Rome LT TT at the same time, single beam
• integrating sphere diodes array

• Cern LT TT 2 specrophotometers,
• double beam filters

Rome
CERN
Lamp
Photodetector
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Intercalibration ACCOCE/ACCOR
Comparison of the longitudinal transmission
LT620gt65
LT420gt55
LT360gt10
sR-C1.4
sR-C0.5
sR-C0.8
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ACCOS Light Yield
Cern and Rome different approach

• CERN LY from decay time spectrum integration

• Rome LY classic photo peak determination in
• the scintillation spectrum of PWO

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Intercalibration ACCOCE/ACCOR
sR-C0.19/Xo
-0.35ltFNUF(/Xo)lt0.35
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Next step SubUnit assembly
Capsules crystals
SubUnits
2x17 types of crystals
23 types of capsules
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Capsule Assembly in Lyon
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Capsule Quality Control

• Capsule control bench (Capucine)
• Measurements of
• Gain curve
• Dark current
• Noise

Capacity of 200 capsules/day
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Correlation between APDs Capsules measurements
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Gluing Setup
INFN/ENEA Rome
CERN/lab27
Gluing jig
CERN
Capacity of 50 sub-units/day
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Gluing Quality Control optically
Bubble viewer
Bubbles
No Bubble
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Gluing Quality Control functionnality

• Sub-unit control bench (Capucinette)
• Measurement of
• V gain50
• Vbreakdown
• Dark current

Correlation Capucine/capucinette
Gluing jig
RC CERN RC Rome
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Next step Submodule assembly
10 sub-units
Alveola structure
Ferrule holder
Tablet
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Submodule Assembly
Capacity of 5submodules/day
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Module Assembly
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Module Assembly
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Supermodule assembly in CERN

• Reception of modules assembled in RC Rome
• Bare Supermodule assembly with modules 1, 2, 3, 4
• Installation of monitoring system
• Installation of electronics
• Supermodules will be then
• calibrated, stored installed in CMS P5

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Transport modules to CERN
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Bare Super-Module Assembly
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Monitoring installation
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Current status of barrel construction

• Spring 1999 module 0 (400crystals) validation
  of toolings, used for cooling test
• Spring 2001 module 0 (400 crystals)
• for beam tests
• Automn 2001/Winter 2002 construction of 1st
  bare Supermodule
• 3 Modules on 4 already built
• Mechanicals part for superbasket will arrive end
  of April
• SM1 assembled in May
• In 2002, in addition to SM1 build 20 Modules (for
  5SM)

• 8700 crystals received and fully characterised
  (see F. cavallari talk)
• 25000 APDs received (see R. Russack talk)
• 2500 capsules produced
• 2100 sub-units produced
• 180 submodules produced

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1st M4 of SM1