CERN/LHCC 2000-034 LHCC 47 21 July 2000


    Minutes of the forty-seventh meeting held on

    Wednesday and Thursday, 5-6 July 2000


    1. Status of the LHC Project: L. Maiani

    2. Prospects for Higgs Searches at the Tevatron: J. Conway

    3. Prospects for Higgs Searches at the LHC: F. Gianotti

    Present: B. Adeva, J. Carr, R. Cashmore, D. Cassel, J. Dainton, J. Engelen (Chairman),
    A. Ereditato, G. Goggi*, M. Kasemann, J. Lee-Franzini, B. Löhr, J. May*,
    J. Nash, K. Potter, A. Rostovtsev, P. Roudeau, T. Ruf*, H. Schellman, P. Sharp,
    K. Tokushuku, E. Tsesmelis (Secretary), G. Zech.

    *) Part time

    Apologies: G. Altarelli, M. Delfino, J.-J. Gomez-Cadenas, Y. Karyotakis, P. Lebrun,
    L. Maiani, J. Panman.


    The Chairman welcomed the new members of the Committee.

    The Chairman informed the LHCC that the Research Board, at its 147th Meeting on 15 June 2000 approved the ALICE TDR on their Time of Flight (TOF) detector under the LHCC formulation which allows the Committee to monitor future progress through the implementation of the schedules and milestones listed in the ancillary document. The Research Board also concurred with the LHCC request for an addendum. Furthermore, the Research Board approved the CMS Addendum to the Tracker TDR under the LHCC formulation, which allows the Committee to monitor progress of this project through the implementation of the schedule and milestones listed in the ancillary document. Finally, the Research Board took note of the successful completion of the RD46 project and of the LHCC general acceptance of the ATLAS High-level Triggers, DAQ and DCS Technical Proposal.

    The minutes of the forty-sixth LHCC meeting (LHCC 2000-030 / LHCC 46) were approved with the following modification: in point 9 (report from the LHCb referees) the last sentence should be replaced by: 'Finally, significant progress was reported on the Level-0 and Level-1 trigger scheme, resulting in an optimised latency and in some hardware and network choices'.


    The Committee heard a report from the ALICE referees, concentrating on the status of the silicon drift and silicon strip detectors. Test results on the final cooling system for the former will now be available in April 2001. An updated list of milestones for the silicon strip detector was shown. The LHCC referees have requested a written document explaining the milestone shifts and providing an updated schedule ensuring the overall silicon strip detector and ALICE time-lines.


    The Committee heard a report from the CMS referees, concentrating on the review of the HCAL, ECAL, Muon, Tracker and magnet systems. The schedule for the hadronic end-cap calorimeter was discussed, showing that the assembly of the two end-caps will now proceed in series. The ECAL crystal delivery from Russia is proceeding satisfactorily and the first crystals from China have been delivered to CMS. Establishing criteria for the crystal acceptance and feedback with the producers is underway. Good progress was reported for the CMS Tracker. Tests with the LHC-type beam in May proved successful and among other results showed the good functionality of the APV6 chip. Good progress was also reported for the magnet and some minor delays were reported in the assembly of the muon system.

    The LHCC Comprehensive Review for CMS will be held at the October session of the Committee.


    The LHCC heard a report from the LHCb referees. The Technical Design Reports for the Calorimeter and RICH detectors will be presented to the LHCC at its next session. The referees also commented on the satisfactory progress on the magnet, Vertex Locator, Inner Tracker, Outer Tracker and the Muon Detector. Finally, the status of the proposed BTeV experiment at Fermilab was noted.

    5.     TEST BEAMS

    T. Ruf showed the updated schedules of the physics programmes for 2000 at the PS East Hall and at the SPS and discussed the operation of the machines and the LHC detector tests performed there, including the tests with the LHC-type beams at the SPS. He also presented an overview of the principal beam time requests at the SPS for the years 2001 to 2003. In general, more beam time is required than is presently projected to be available. The current draft schedule for 2001 has physics at the SPS starting on 26 June, dictated by the civil engineering works for the LHC, and extending until 7 October. T. Ruf requests the SPS users to submit to him by 21 August of this year their requests and justification for extending next yearís run until the end of October. This is particularly relevant in case of a further run with the LHC-type beam next year.


    Since the approval of the Technical Proposal at the end of 1995, the ATLAS Collaboration has made very significant progress towards the realisation of an experimental set-up ready to record proton-proton collisions at the LHC in the middle of 2005. In particular, all detector technologies to be used, together with the associated electronics, have successfully gone through the R&D phase and construction of the final components has either started or is imminent.

    The design and tests of the front-end electronics have in general been successfully completed, although in some cases the transfer of these designs into radiation-hard technologies has not yet been completed. Back-up solutions have, however, been identified.

    It is realistic to expect ATLAS to install a sensible working detector from the beginning of LHC operation in July 2005, although detector installation can be foreseen beyond this date. In particular, the LAr End-cap A is expected to be ready for installation five months later than required. A detailed scenario, aiming at a detector ready to exploit the LHC physics as of July 2005, has yet to be worked out. The LHCC urges the ATLAS collaboration to develop such a detailed scenario, which should in particular address the schedule of the LAr End-cap A.

    The first of the LHCC Comprehensive Reviews of ATLAS took place on 3-4 July 2000. The LHCC referees addressed the following areas: Inner Detector, Muon Spectrometer, Calorimetry, Trigger/DAQ/DCS, Physics Studies, Computing, and the topics of Management, Technical Coordination, Integration, Schedules and Costs.

    The principal conclusions and concerns of the LHCC are summarised below. These will allow the Committee to follow-up outstanding issues and to monitor future progress of this project in upcoming sessions of the LHCC prior to the next ATLAS Comprehensive Review.

4-5 October
29-30 November
Provisional Dates for 2001:
31 January ó 1 February
28-29 March
16-17 May
4-5 July
3-4 October
21-22 November

  Emmanuel Tsesmelis
Eómail: LHCC.Secretary@CERN.CH
Tel. 78949

  LHCC Secretariat: Janet Grant (Bldg. 14/4-022) Tel. 73424