LHCb Summary of Project Status Neville Harnew LHCb

LHCb Summary of Project Status Neville Harnew LHCb Management Board Meeting, RAL, 1/5/01

Outline of the talk 1) 2) 3) 4) 5) 6) 7) RICH Vertex Locator Magnet (v. brief) Computing Status of TDRs Collaboration issues Summary

1) RICH February 2001: Technical Design Report has been approved by the Research Board Status of UK work RICH-1 mechanics : RICH-2 mexhanics : Photodetector test facilities : RICH Electronics : G. Barber P. Soler F. Muheim J. Bibby

Significant concern now is: final choice of the photon detector Baseline option Pixel HPD 1024 pixel (500 mm) detector and bump bonded pixel readout electronics. Photocathode deposition and anode encapsulation at DEP.

1 m. V = 50 e 1 pe = 5000 e pixel chip Chip does not run above 20 MHz: S/N = 50 v. good! not so good! However functional and will be encapsulated by August. Revised submission in June. Structure for bump bonding test. Situation will be reviewed in October 2001. Backup is the MAPMT : UK solely working !

Re-examination of the stations. An example: Station 11 is designed for RICH-2 With: a better resolution for the track angle measurements at low p. not too important for RICH-2 Without: RICH-2 can be extended more Cherenkov photons - Necessity of ST 11 is being discussed. -

2) Vertex Locator : T. Bowcock (TDR May 2001) Baseline sensor technology defined 300 mm n-on-n single sided Si with double metal layer Radiation hard readout chip Two options: SCTA-VELO based on DMILL technology design fulfilling all the requirements submitted in November 2000 or: BEETLE based on 0. 25 mm technology development in progress

VELO mechanics closely linked to the machine Openings for feedthrough flanges (25’ 000 pins) 25 cm Vertex detector half RF/Vacuum thin shield Exit window 1. 5 -2 mm thick Al m 0 c 2 1 Cooled Si sensors in secondary vacuum Regular reviews by the LHC machine group: 1 st review: 3 -4 April 2001 (very positive and constructive) 2 nd review foreseen in February 2002

Evolution of the beam pipe design Al pipe + Stainless steel flanges and bellows Al pipe + Al flanges and bellows Al-Be alloy pipe + Al flanges and bellows (LHCb favoured solution)

3) Magnet Three contracts Al conductor: Holton Machinery LTD, UK Coil construction: Sigma. Phi, France Iron for yoke: Jebens, Germany were placed and signed. Extrusion trial of the Al conductor

4) Computing (N. Brook) Offline effort Framework (GAUDI) and Reconstruction (BRUNEL) in place. Simulation (GEANT 4) effort has started. Event Display integrated in GAUDI + GEANT 4 ALSO : Leading role in UK GRID activity

5) STATUS OF TDRs Magnet Out to tender VELO May 2001 RICH Approved Feb 2001 Inner Tracker December 2001 All Si solution is preferred if we can afford it. Outer Tracker Calorimeter System Trigger Muon System September 2001 Approved Feb 2001 January 2002 May 2001

6) Collaboration Issues Withdrawal of in-active members Russia: Lebedev Institute Germany: Humboldt University, Freiburg University New Collaborators from Brazil Full member: CBPF Technical Associate: CEFET RJ (host UFRJ) Currently the LHCb collaboration consists of 47 member institutes + 3 technical associates 500 people from 14 countries. Mo. U signed by France, Germany (MPI), Italy, The Netherlands, Romania, Russia Switzerland (Lausanne, Zurich), UK [80% of funding] Still to be signed by Brazil, China, Germany (BMBF), Poland, Spain, Ukraine

7) Summary -LHCb good general progress in all areas -3 TDR’s approved including : Magnet: major components have been ordered RICH: photon detector is the crucial item (MAPMT backup solution available) -VELO TDR will be submitted in May