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AGENDA

AGENDA. CALORIMETRY and other subdetectors session. About 5 hours 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’

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AGENDA

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  1. AGENDA CALORIMETRY and other subdetectors session About 5 hours session J-C. BRIENT LLRStatus report on the W-Si ECAL 30’ V. VRBA IP-ASCRSilicon pad sensors for the W-Si ECAL 30’ S. MANEN LPCReadout electronics for the W-Si ECAL 30’P. CHECCHIA PADOVAStatus of the tile-silicon ECAL project 30’V. KORBEL DESYStatus of the tile HCAL 30’J. CVACH IP-ASCRTile and fiber measurement for the tile HCAL 30’B. DOGOLSHEIN MEPhIReadout of the tile HCAL with silicon PM 20’T. TAKESHITA SHINSHUACFA/JLC calorimeter studies 20’J. REPOND ANLIn search for an active medium for the HCAL 25’V. AMMOSOV IHEPProgress report on the digital HCAL at IHEP 25’E. FISK FNALScintillator based muon detector 10’M. PICOLLO LNFStatus on the muon detector 20’ J-C BRIENT LLR

  2. CALORIMETER EM 2 projects on the way - LCcal (Italian project) Lead/tiles+3 planes of silicon (next september) -CALICE collaboration Silicon – tungsten (40 layers) 30 layers in prototype (end of 2003) Project active medium readout LCcal tile+fiber PM (just for proto.) silicon matrix chip on PCB CALICE silicon matrix chip (Opera) on PCB dedicated R&D for new VFE chip J-C BRIENT LLR

  3. LCcal project J-C BRIENT LLR

  4. LCcal LARGE tile plates BUT SMALLER CELLS Scintillator tiles • 3 mm Kuraray SCSN-61(25x25 cm2) • 3 mm Bicron BC-408 (25x25 cm2) Machined with vacuum plate as holder • - cross talks • light collection effic.- in B-field ?? Whole Production starting now P.Checchia presentation J-C BRIENT LLR

  5. The ACFA calorimeter design • In sense very similar to the LCcal • tiles + 2 high granularity planes (not in Si) ECALand 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 optimisation • photon/pion geometrical separation PFLOW • In progress , we can hope to have informations • at LCW2002 J-C BRIENT LLR

  6. CALICE coll. • Physics 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 + DAQin definition in UK 5 labs(IC,UCL,Manch.,Camb.,Birm.) J-C BRIENT LLR

  7. Top view of the pads in the Si matrix CALICE coll. 5 masks DC coupling 1 cm THEN Deposition of Si am. for the AC coupling See V.Vrba presentation J-C BRIENT LLR

  8. CALICE coll. R&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) -3 gains- low noise - low power- different techno.- MUX+ ADC’s included …. Presentation of S.Manen J-C BRIENT LLR

  9. 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 216 Calice -FLC 132/178 18/40% reduction Cost of the calorimeter W-Si ECAL cost … still an argument ? J-C BRIENT LLR

  10. My personal view on the ECAL status - expected performances on jets for LCcal missing only in progress for ACFA projective tiles - advanced study on the hardware side on AFCA and LCcal only in progress for W/Si-CALICE LINK with PFLOW and physics results Volunteers needed !!! J-C BRIENT LLR

  11. HADRONIC CALORIMETER 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

  12. TILE HCAL 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 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 J-C BRIENT LLR

  13. 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 with • collimated Ru106 source, • simple current measurement for LY Ru106 source, s ~ 2cm Talks from V.Korbel (DESY) J-C BRIENT LLR

  14. PM fiber in groove fiber on side Groove effect not masked by source profile Talks from J.Cvach (IP-ASCR) Example: tile with middle groove J-C BRIENT LLR

  15. Silicon photomultiplier Talks by B.Dolgoshein Pixel gain sensitivity SiPM APD • on voltage dG/G ~ 7 dV/V dG/G ~ 75 dV/V dG/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) WARNING on saturation effect !!!  number of pixel/mm² on efficiency J-C BRIENT LLR

  16. Scintillator in US Advantages: Old technology Effort in US : NIU-NICCAD Investigations Different types of scintillator Fiber routing and light losses Readout 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 Cosmic ray test Realistic set-up with fibers etc. ADC counts J-C BRIENT LLR

  17. DIGITAL HCAL Which 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 Nobody works here – need volunteers Acceptable Rates and occupancy Thickness Cost for large area Cross talk Efficiency for a mip J-C BRIENT LLR

  18. First results for RPC’s at IHEP (V.Ammosov) m.i.p. efficiency about 95-98 % Fake (noise) about 0.2 Hz/cm² cross talks 1.06 (SDT) /1.2 (RPC’s) Very encouraging results BUT need a similar measurement with a multilayers device using thin readout electronics ,….. A weak place today , NEED VOLUNTEERS J-C BRIENT LLR

  19. Talks by J.Repond (ANL) Test chambers Obtained from FNAL Glass: t = 2.1 mm Single gap: 2.1 mm Gas Freon 62% Argon 30% Isobutene 8% Test set-up at Argonne Cosmic ray telescope Computer controlled readout - Events written to disk - Possibility to readout large number of channels J-C BRIENT LLR

  20. conclusion 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 HCALis a rising activity It looks promising but needs definitely more work Don’t be afraid by calorimeters, (ILC-detector panel…) and join us in this adventure…. J-C BRIENT LLR

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