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LHCb Overview of Project Status

LHCb Overview of Project Status. Neville Harnew LHCb Management Board Meeting, RAL, 26/11/01. Outline. RICH VELO LHCb Re-optimization Status of TDRs Financial status. RICH. TDR submitted in September 2000 approved February 2001. Baseline Technology Two RICH detectors with

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LHCb Overview of Project Status

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  1. LHCb Overview of Project Status Neville Harnew LHCb Management Board Meeting, RAL, 26/11/01

  2. Outline • RICH • VELO • LHCb Re-optimization • Status of TDRs • Financial status

  3. RICH TDR submitted in September 2000 approved February 2001 Baseline Technology Two RICH detectors with three radiators: aerogel+C4F10 CF4 Photon detector: Pixel HPD MaPMT as backup

  4. ALICE/LHCb pixel readout chip readout speed 10 MHz Problems were found and corrected. New submission: December • HPD base plate with Bump-bonded pixel+readout chip • Two base plates sent to DEP for encapsulation. Expected to be back in November. Both milestones were missed by several months Status is the subject of internal review. MAPMT backup : UK effort is critical to the backup solution BEETLE chip

  5. VELO May 2001 TDR submittedOctober 2001 TDR recommended for approval Baseline technology: Sensors: 300mm n-on-n short strips double metal layer for readout Electronics: SCTA-VELO (DMILL) or BEETLE (0.25mm CMOS)

  6. LHCb Re-optimisation Problem 1 : “Realistic” LHCb detector has 70% more material than the TP. Material up to RICH-2 ~ 0.6X0, 0.2λI => Increased secondaries, reduced track finding & reconstruction efficiency, increased fake tracks => B+- ~ 15% loss; BSDSK~ factor 3 loss ! Problem 2 : Difficulties in reducing trigger rate at Levels 1/2: Proposal to have B field (~500G) at RICH-1.

  7. Effort to reduce the material budget … Improving VELO (e.g. rf shield) & RICH-1 (mirror, aerogel) remove magnet tracking stations

  8. First effort (already made): beam pipe: Al  Be-Al alloy (possibly the first 25 mrad cone with Be) Second effort reduce detector material VELO0.19 X0, 0.04 I Possibilities are being investigated for Be RF shield, thinner Si 300 220 , etc. 0.19 X0 0.11 X0 RICH-10.14 X0, 0.05 I Possibilities are being investigated for composite mirror, light mirror supports, no aerogel, etc. 0.14 X0 0.08 X0 Outer Tracker0.03 X09 stations 0.27 X0, 0.11 I Reduce to 4 stations 0.27 X0 0.12 X0

  9. Level-1 trigger studies B0d +- Min. Bias Preliminary Signal 1) TP performance 2) With B: needs more work, but gives better performance . Significant implications for RICH-1

  10. The road map • By the end of 2001 • Establish the validity of the new tracking strategy • Investigate new designs of RICH-1 and VELO • Late Spring 2002Re-optimised LHCb detector • Autumn 2002Addendum to LHCC on fully re-optimised LHCb detector NB : Significant changes to RICH-1 possible - 9 month delay in mechanical design.RICH-2 unaffected. Cost neutral across LHCb.

  11. STATUS OF TDRsMagnet Construction startedVELO Approved Oct 2001RICH Approved Feb 2001 Inner Tracker December 2001All Si solution has been agreed. Outer Tracker September 2001 Calorimeter System ECAL, HCALconstruction startedTrigger January 2003Delay from Jan 2002 => Jan 2003 (for optimization). Muon System May 2001IT, Trigger and Computing End of 2002.

  12. Financial status MoU signatures are still missing from Brazil, China, BMBF (Germany), Poland, Spain (~85% of funding in place) The LHCb detector is planned to be ready for the pilot run in April 2006 with full physics potential. No indication for any additional cost beyond the MoU cost for the moment(and every efforts are made to stay so).

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