J-C BRIENT LLR

AGENDA CALORIMETRY and other subdetectors session

J-C. BRIENT LLR Status report on the W-Si ECAL 30’V. VRBA IP-ASCR Silicon pad sensors for the W-Si ECAL 30’S. MANEN LPC Readout electronics for the W-Si ECAL 30’P. CHECCHIA PADOVA Status of the tile-silicon ECAL project 30’V. KORBEL DESY Status of the tile HCAL 30’J. CVACH IP-ASCR Tile and fiber measurement for the tile HCAL 30’B. DOGOLSHEIN MEPhI Readout of the tile HCAL with silicon PM 20’T. TAKESHITA SHINSHU ACFA/JLC calorimeter studies 20’J. REPOND ANL In search for an active medium for the HCAL 25’V. AMMOSOV IHEP Progress report on the digital HCAL at IHEP 25’E. FISK FNAL Scintillator based muon detector 10’M. PICOLLO LNF Status on the muon detector 20’

About 5 hours sessionAbout 5 hours session

J-C BRIENT LLR

2 projects on the way- LCcal (Italian project)

Lead/tiles+3 planes of silicon (next september)

-CALICE collaborationCALICE collaborationSilicon – tungsten (40 layers)30 layers in prototype (end of 2003)

Project active medium readoutLCcal tile+fiber PM (just for proto.)

silicon matrix chip on PCB

CALICECALICE silicon matrix chip (Opera) on PCBdedicated R&D for new VFE chip

CALORIMETER EMCALORIMETER EM

J-C BRIENT LLR

LCcal project

J-C BRIENT LLR

Scintillator tiles• 3 mm Kuraray SCSN-61(25x25 cm2)

• 3 mm Bicron BC-408 (25x25 cm2)

Machined with vacuum plate as holder

Whole Production starting now

LCcalLCcal

P.Checchia presentation

LARGE tile plates BUT SMALLER CELLS

- cross talks- light collection effic.- in B-field ??

J-C BRIENT LLR

The ACFA calorimeter designThe ACFA calorimeter design

In sense very similar to the LCcal LCcal tiles + 2 high granularity planes (not in Si) ECAL and projective tiles /lead in the HCAL

- nice e/h ratio almost flat in momentum - some developments on the photodetector side

-main concerns on the granularity optimisationphoton/pion geometrical separation PFLOWPFLOW

In progress , we can hope to have informations at LCW2002

J-C BRIENT LLR

CALICE coll.CALICE coll.

Physics prototypePhysics prototype

-- tungsten good first prod. ITEP,IHEP,LLR

-- Si. matrix in production IP-ASCR, MSU,PICM

-- VFE chip first version in prod LAL

-- Digital part + DAQin definition in UK 5 labs(IC,UCL,Manch.,Camb.,Birm.)

J-C BRIENT LLR

St Malo, 13th April 2002 Václav Vrba, Institute of Physics, AS CR8

Deposited resistors – before deposition

Top view of the padsin the Si matrix

Deposition of Si am. for the AC coupling

5 masks DC coupling

THEN

See V.Vrba presentation

CALICE coll.CALICE coll.

1 cm

J-C BRIENT LLR

CALICE coll.CALICE coll.

R&D for the final projectR&D for the final project

- silicon matrix large scale prod. IP-ASCR, MSU,PICM,SNU,LLR

- VFE chip Proto. to fundery LAL, LPC

- A new design of the detector slab LLR,Manchester, …(need volunteers here)

Presentation of S.Manen

-3 gains- low noise - low power- different techno.- MUX+ ADC’s included ….

J-C BRIENT LLR

There are good reasons to believe in a cost of 2 €/cm² for the silicon For the complete set ECAL + HCAL + Muon-CH ( MCH)

CMS

Calice -FLC

216

132/178

18/40% reductionCost of the calorimeterCost of the calorimeter

W-Si ECAL cost … still an argument ?W-Si ECAL cost … still an argument ?

J-C BRIENT LLR

My personal view on the ECAL status

- expected performances on jets for LCcalLCcal missing only in progress for ACFAACFA projective tiles

- advanced study on the hardware side on AFCAAFCA and LCcal only in progress for W/Si-CALICEW/Si-CALICE

LINK with PFLOW and physics resultsLINK with PFLOW and physics results

Volunteers needed !!!

J-C BRIENT LLR

HADRONIC CALORIMETER HADRONIC CALORIMETER

Evolution or revolution?Evolution or revolution?HC1 5X5 to 20x20 cm tiles/steel sampling known technology for a semi-analytic PFLOW (tiles size)

Scint. Tiles/lead projective tower + photodetector (APD,…)

HC2 1X1 cm digital readout Totally PFLOW oriented , A brand new way to measure energy (well not so brand new …)

J-C BRIENT LLR

Well covered by R&D scintillator – fiber – geometry ITEP,DESY,IP-ASCR

Not covered by R&D AGING – Perf. In B-field – photodetector

(in preparation at (in preparation at ITEP,….ITEP,….))

(review by Volker Korbel and talks by B.Dolgoshein, J.Cvach)

APD , Si PM , multi-anode APD,….. far from a clear view on that side

TILE HCAL

J-C BRIENT LLR

Search for optimal WLS-Fibre arrangement

10 different TF configurations studied• WLS fibre end polished, no reflector• air gap contact to tile• Tyvek reflector on tile

tile irradiated withcollimated Ru106 source,simple current measurement for LY

Ru106 source, ~ 2cm

Talks from V.Korbel (DESY)

J-C BRIENT LLR

Example: tile with middle groove0

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fiber on side

fiber in groove

Groove effect not masked by source profile

PM

Talks from J.Cvach (IP-ASCR)

J-C BRIENT LLR

Pixel gain sensitivity

SiPM APDon voltage dG/G ~ 7 dV/V dG/G ~ 75 dV/VdG/G ~ 3% for dV=0.1 V(V=24.5 V)

on temperature dG/G ~ 1.7 dT/T (oK) dG/G ~ 17 dT/T dG/G ~ 0.5% for dT=1o

(To=-20oC)

Silicon photomultiplierTalks by B.DolgosheinTalks by B.Dolgoshein

WARNING on saturation effect !!! number of pixel/mm² on efficiency

J-C BRIENT LLR

Scintillator in USAdvantages: Old technology Effort in US : NIU-NICCAD

Has to work in B-field

Choices: Avalanche photodiodes: low gain

Hybrid photodiodes: complicated readout

VLPC: Visual Light Photon Counters Quantum efficiency: 60 – 80 % Gain: 105 – 106

Operates at 7 0K

MRS: Metal Resistor Semiconductor Photodiodes Recent development Quantum efficiency: ~30% Operates at room temperature

Plot by V Rykalin

ADC counts

Cosmic ray testRealistic set-up with fibers etc.

Different types of scintillatorFiber routing and light losses

Investigations

Readout

J-C BRIENT LLR

DIGITAL HCAL

Which active mediumWhich active medium - talks by V.Ammosov (IHEP), J.Repond (ANL)

- RPC’s (avalanche or streamer)- SDT (short drift tubes)- GEM (proposal from Uni.Texas)

Which radiator Which radiator Nobody works here – need volunteers

Acceptable Rates and occupancyThicknessCost for large areaCross talkEfficiency for a mip

J-C BRIENT LLR

First results for RPC’s at IHEP(V.Ammosov)(V.Ammosov)

m.i.p. efficiency about 95-98 %Fake (noise) about 0.2 Hz/cm²cross talks 1.06 (SDT) /1.2 (RPC’s)

Very encouraging results BUTBUTneed a similar measurement with a multilayers deviceusing thin readout electronics ,…..

A weak place today , NEED VOLUNTEERSA weak place today , NEED VOLUNTEERS

J-C BRIENT LLR

Test set-up at Argonne Cosmic ray telescope Computer controlled readout - Events written to disk - Possibility to readout large number of channels

Test chambers Obtained from FNAL Glass: t = 2.1 mm Single gap: 2.1 mm Gas Freon 62% Argon 30% Isobutene 8%

Talks by J.Repond (ANLJ.Repond (ANL)

J-C BRIENT LLR

Tile-HCAL Tile-HCAL is a known technollogy

well covered by R&D and a prototype is foreseen Need clearly work on photodet. and readout system

Digital HCALDigital HCAL is a rising activity

It looks promising but needs definitely more work

Don’t be afraid by calorimeters, (ILC-detector panel…)Don’t be afraid by calorimeters, (ILC-detector panel…) and join us in this adventure….and join us in this adventure….

conclusionconclusion