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

6

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