introduction with pictures prototype design and construction
DESCRIPTION
CALICE - ECAL silicon-tungsten. Introduction with pictures Prototype design and construction R&D on the design of the full scale calorimeter. e + e – W + W – at s = 800 GeV. After reconstruction. e + e – W + W – at s = 800 GeV. Classified as charg ed pads. - PowerPoint PPT PresentationTRANSCRIPT
1
J-C. BRIENT (LLR)
Introduction with pictures
Prototype design and construction
R&D on the design of the full scale calorimeter
CALICE CALICE - - ECALECAL silicon-silicon-tungstentungsten
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J-C. BRIENT (LLR)
Simulation,visualisationMOKKA, FANAL
e+e– W+W– at s = 800 GeV
Classified as charged pads
Classified as photon’s pads
e+e– W+W– at s = 800 GeV
After reconstruction
Just to recall the reason of the choice Just to recall the reason of the choice
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J-C. BRIENT (LLR) Jet mass
Jets at 91 GeV
ZH at 500 GeVZ in , H in jets
Photon energy GeV
Photon ID in jets
ID
→
→and→
250 GeV ±
Particle momentum GeV
ALL VALUES in %
Electron ID in jets
Electron ID
Hadron MISID
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J-C. BRIENT (LLR)
Looking along the charged track in the first 4 X0
Jet mass < 0.2
Jet mass in 0.2-2
→
82% 17%
→
2% 90%
Tau decays ID is essential for ID and polarisation measurement
charged pion
Photons from o
Looking alongthe ch. trackin 5-12 X0
(250 GeV) →
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J-C. BRIENT (LLR)
Introduction with pictures
Prototype design and construction
R&D on the design of the full scale calorimeter
CALICE CALICE - - ECALECAL silicon-silicon-tungstentungsten
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J-C. BRIENT (LLR)
370 mm
ECAL general view
3rd structure (3×1.4mm of W plates)
370 mm
180 mm
Silicon wafer
2nd structure (2×1.4mm of W plates)
VME/PCI/…
HCAL
VFEMovable table
ECALBeam
monitoring
Global view of the test beam setup
Prototypes Prototypes overviewoverview
BEAM
1st structure (1.4mm of W plates)
Detector slab
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J-C. BRIENT (LLR)
Design and construction of a mould with all metallic pieces for the 3 different structures
Mould for alveolus structure 1.4
Alveolus structuresAlveolus structures
Structure 5 alveolus :(10 layers)
Detector slab (here it is just a type H structure)
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J-C. BRIENT (LLR)
Front End electronics
(Cfi / W) structure type H
Silicon wafer
Shielding
PCB
Al. ShieldingPCB (8-10 layers)
( 2 - 2.5 mm)
Silicon wafer
(0.525 mm)
Tungsten(1.4 mm, 2×1.4 or 3×1.4 mm)
7.3
mm
Composite structure (0.15 mm / layer)
Transverse view
Detector slabDetector slab
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J-C. BRIENT (LLR)
1 wafer
62mm
62mm
Diode pinout
Diode biasSig. readout
PCBWafers
The aluminium sheet is the ground
Aluminium sheet
10mm
10mm
2 2 2 2 2
2
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Diode footprint
Detector schematic descriptionDetector schematic description Amorphous silicon deposition Protection
Capacitance (AC coupling)
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J-C. BRIENT (LLR)
4” high resistivity wafers
-525 microns thick – 5Kcm
- tile side: 62.0 + 0.0 - 0.1 mm
- scribe line: 100 m
- scribe safety zone: 200 m
- guard ring width: cca 750 m (cca 1.5 * wafer thickness)
ECAL prototype ECAL prototype silicon wafer silicon wafer descriptiondescription
Dead zone w
idth is
only 1mm
Wafer book keeping information
24 good 24 good (<10nA leakage)
First test production First test production with 25 waferswith 25 wafers
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J-C. BRIENT (LLR)
low noise 1.6 nv/Hzgood linearity non-linearity ≲ 1%large dynamic 650 mip
CHIP FLC-PH1 developed at LAL
Front End electronics Electronic readoutElectronic readout
•18 charge inputs•18 voltage outputs•1 MUX voltage output
Custom-built VME readout board (UK) First prototype April 2003
Board based on PCI or even USB2.0 is also under study
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J-C. BRIENT (LLR)
ITEMS LABORATORIES
- Tungsten production and test ITEP, IHEP, LAL- Mechanics assembly (Cfi,…) LLR, LPC
- Silicon wafers production MSU (Moscow), IPASCR (Prague) - Amorphous silicon deposition,… PICM, LLR
- VFE design and production LAL, (LPC for large scale R&D)- ADC’s and DAQ IC, UCL, Manchester,
Cambridge , Birmingham
- Detector slab assembly LLR- Cosmics test on assembled device LLR
Responsibilities Responsibilities
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J-C. BRIENT (LLR)
Meetings and Meetings and Agenda Agenda
21th January 2003 , ORSAY (LAL)
meeting on ECAL prototype - Technical meeting on
construction , test, beam def., …
End February 2003 , PALAISEAU (LLR)
meeting on Digital HCAL prototypeDigital HCAL prototype - responsibilities- funding- repartition of works
ECAL ready for a first debugging test beamECAL ready for a first debugging test beam at theat the Summer-Fall 2004 Summer-Fall 2004
The goal is :
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J-C. BRIENT (LLR)
Introduction with pictures
Prototype design and construction
R&D on the design of the full scale calorimeter
CALICE CALICE - - ECALECAL silicon-silicon-tungstentungsten
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J-C. BRIENT (LLR)
Other R&DOther R&D
Cooling of the readout
Impact of e.m. shower on the VFE
- Study with SPICE and SAMCEF- Small prototype to validate the simulation- First response for Amsterdam 2003
- First study with GEANT4GEANT4- Possibility to use the beam H4 (CERN) with 200 GeV electron in 2003- First response at the end of 2003
Under preparationBy the LAL group
Collaboration is welcome
Collaboration is welcome
For the electronic readout inside the detector and if needed by the dissipation of the VFE
In progress at LLR
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J-C. BRIENT (LLR)
PCB 1mm thick(with wafers)
Heat points(VFE chip)
Cooling channel
Radiator aluminium plate
Structure type H
Thermal sensors
Externalconnections
Global simulation of the device with SPICE (static as well as dynamic simulation)
Local simulation by finite elements using SAMCEF (using the condition at the limit obtains by SPICE)
Correlation and validation of the simulations by a small prototype
Simulation of a “large scale" detector slab and its environment.
In progressat LLR
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J-C. BRIENT (LLR)
R&D – 1st results SPICE/SAMCEF
Point numbers
Degree K
T1 T2 T3 …
T1
T2
T3
T4
T5
T6
T7
T8
80 mm180
mm
SPICE SAMCEF
Conditions at the limits
Temperature distribution :
Results :
T1 T2 T3
T4
T5
T6T7T8
V = Temperature I = Calor flux
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J-C. BRIENT (LLR)
ConclusionConclusion
The prototype design is almost fixed
The prototype construction will begin soon
Ready for a first test beam in 2004
The R&D on the large scale detector are in progress
In both case, collaboration with US labs. is welcomed