LARGE HADRON COLLIDER COMMITTEE
Minutes of the fourtieth meeting held on Thursday and Friday,
27-28 May 1999
1. Status of the LHC project: L. Maiani
2. Status of the LHC machine: L. R. Evans
3. ALICE proposal addendum ó Transition Radiation Detector (LHCC 99-13): P. Braun-Munziger
4. Report from the Standard Model Workshop: G.
CLOSED SESSION :
1. The minutes of the thirty-ninth LHCC meeting (LHCC 99-11 / LHCC 39) were approved without amendment.
2. REPORT FROM THE ALICE REFEREES
The Committee heard a report from the ALICE referees, concentrating on the review of the Technical Design Reports for the PHOS and ZDC detectors.
The referees also reported on their preliminary reactions to the Technical Design Report for the TRD detector. Following further questions and discussions, the referees will make a full report at the next meeting of the LHCC.
The referees also reviewed the schedule for the ALICE TDRs and reported on the status of the muon spectrometer and TPC following their recent discussions with the collaboration. It was also announced that the ALICE ITS will be reviewed with H. Dijkstra as consultant.
3. REPORT FROM THE ATLAS REFEREES
The Committee heard a report from the ATLAS referees, concentrating on the review of the Technical Design Report for the Technical Coordination TDR.
The referees also reported on the current status of the various milestones relative to the TDRs. The full set of revised Level-1 milestones will be submitted for discussion at the July meeting of the LHCC. They will replace the milestones in the ancillary documents of the LHCC recommendations for the TDRs. These milestones will be used to provide an understanding of the critical path and critical items, and to measure and regulate the future progress of the ATLAS project.
The referees also discussed the preparation of the ATLAS Physics Performance TDR, to be available for the next meeting of the LHCC, and the status and plans of various subsystems.
4. ALICE ZERO DEGREE CALORIMETER TECHNICAL DESIGN REPORT
The LHCC has completed its scientific, technical, and cost evaluation of the ALICE ZDC TDR submitted in March 1999. The Committee is fully satisfied with the technical solution presented and congratulates the collaboration. The quartz fibre calorimeters described in the TDR are based on a well-established technique; they are able to survive the harsh radiation conditions and can provide a reliable impact parameter measurement.
The Committee has no concern about the technical realisability of the calorimeters. In view of the limited complexity of the project, the Committee feels that, with the exception of the small number of milestones listed in the ancillary document (LHCC 99-20), no further milestones are required.
The LHCC review was not an engineering review, although some engineering aspects of the project were presented and discussed with the referees.
The LHCC recommends general approval of the ALICE ZDC TDR. The LHCC considers that the schedules and milestones given in the TDR and in the ancillary document to be reasonable, and these will be used by the Committee to measure and regulate the future progress of the project.
5. ALICE PHOTON SPECTROMETER TECHNICAL DESIGN REPORT
The LHCC has completed its scientific, technical and initial cost evaluation of the ALICE PHOS TDR submitted in March 1999. The Committee is impressed by the quality of the work presented in the TDR and congratulates the collaboration. The technology (PbWO4 crystals) and design of the calorimeter are well-suited for the detection of photons in the high multiplicity environment of ALICE. In addition, p0s and h s will be reconstructed with adequate energy resolution.
The Committee has no major concerns; however, an ancillary document (LHCC 99-19) contains items of lesser concern as well as a list of agreed milestones for monitoring the progress of the project.
The LHCC review was not an engineering review, although some
engineering aspects of the project were presented and discussed. It is
recommended that ALICE conducts an independent review of the engineering design.
Written reports should be made available to the LHCC through its
The LHCC recommends general approval of the ALICE PHOS TDR, pending a final cost evaluation. The LHCC considers that the schedule given in the TDR and the revised list of milestones given in the ancillary document to be reasonable. They will be used by the Committee to measure and regulate the future progress of the project.
6. ATLAS TECHNICAL COORDINATION TECHNICAL DESIGN REPORT
The LHCC has completed its scientific and technical evaluation of the ATLAS Technical Coordination TDR. The Committee is impressed by the quality of the work and congratulates the collaboration. The TDR describes an organised approach to the overall integration of the ATLAS detector.
The plans for document management, drawing management, configuration management, technical reviews, safety reviews, and change control are in place and are being used. We have no major concerns, however, an ancillary document (LHCC 99-18) contains items of lesser concern. The scheduling process together with a list of milestones and a procedure for regular milestone follow-up is also in place. ATLAS top level milestones will be collected in an ancillary document for use by the LHCC.
The LHCC review was not an engineering review but some engineering aspects of the Technical Coordination TDR were presented and reviewed. It is recommended that ATLAS conducts independent reviews of the engineering designs. Written reports from these reviews should be made available to the LHCC through its referees.
The LHCC recommends general acceptance of the ATLAS Technical Coordination TDR. The LHCC considers the schedule given in the TDR to be reasonable. The pending list of revised top level milestones will be used by the Committee to measure and regulate the future progress of the project.
7. REPORT FROM THE MOEDAL REFEREE
The Committee heard a report from the MOEDAL referee, concentrating on the review of the MOEDAL Letter of Intent. The LHCC recognises with great interest the relevance of a search for highly ionising particles at the LHC. MOEDAL is able to unambiguously identify the signature of monopoles through correlated signals in several plastic foils. The plastic foils should be capable of operating in the LHCb environment, although further studies of the radiation induced background of spallation fragments and neutrons are encouraged.
To this aim the LHCC encourages the MOEDAL Collaboration to continue developing their experimental design with a view to preparing a technical proposal.
8. REPORT FROM THE TOTEM REFEREES
The Committee has completed the scientific evaluation of the TOTEM Technical Proposal submitted in March 1999. The Committee is impressed by the quality of the work in the TP and congratulates the collaboration. The TP describes a suitable machine optics and a possible experimental set-up integrated within CMS which can provide a measurement of the total cross-section and diffraction dissociation at the LHC.
The Committee recognises the importance of the total cross-section measurement and notes than an experimental set-up can be integrated within the LHC at the location of the CMS detector.
The Committee takes note of the contacts between TOTEM and CMS and awaits a formal statement from the CMS Collaboration by September 1999, confirming that TOTEM can be integrated within CMS.
The Committee takes note that a "CMS/TOTEM Workshop on Diffractive Physics" is scheduled for November 1999 and looks forward to a summary report. The workshop should address both the physics and technical issues of the combined CMS and TOTEM system, especially in the areas of trigger and read-out.
9. REPORT FROM THE CMS REFEREES
The Committee heard a report from the CMS referees. The milestone reporting procedures were reviewed together with the current status of the various milestones. An agreed set of updated milestones will be available for the July meeting of the LHCC.
The referees also reported on the status of the crystals for the ECAL and on the MSGC tracker, the latter having been reviewed with U. Straumann as consultant. The first batch of crystals has been received from Russia and the quality of the crystals from China have shown good improvement. CMS has decided that the baseline MSGC test as defined in the TDR has the highest priority and that no other MSGC-based option for the barrel seems readily available. A decision on the MSGC+GEM option for the forward region will be taken in June, and if positive a series of tests will be performed at PSI.
10. REPORT FROM THE LHCb REFEREES
The Committee heard a report from the LHCb referees, including a review of the ongoing studies for the choice of the magnet coil configuration, the decision for which is expected in the middle of the year. The referees also summarised the status of the RICH, the trigger and the inner tracker, and presented results of the studies regarding the sensitivity of the trigger to various structure function parametrisations. The referees informed the Committee that LHCb has provided documents summarising their test beam activities and their list of milestones. In general, the referees are very pleased with the progress of LHCb and with the interaction with the experimentís management.
11. TEST BEAMS
T. Ruf showed the updated schedules of the 1999 SPS and PS Fixed Target Programmes together with a status report of the various test beam activities. He also outlined the 1999 tests at the Lepton Pre-Injector (LPI) at the PS Complex. The main users of this irradiation facility are the LHC machine, CMS and LHCb.
12. ANY OTHER BUSINESS
The Chairman announced that the next session of the LHCC will be a one day meeting and will be held on Thursday, July 8th.
13. DATES FOR 1999 MEETINGS
8 July (Thursday)
2 - 3 September (Thursday - Friday)
20 - 21 October (Wednesday - Thursday)
The LHCC received the following documents
· ALICE Collaboration: A Transition
Radiation Detector (LHCC 99-13 / P3 Addendum 2)
· Review of the ATLAS Technical Coordination Technical Design Report (LHCC 99-18)*
· Review of the ALICE Photon Spectrometer (PHOS) Technical Design Report (LHCC 99-19)*
· Review of the ALICE Zero Degree Calorimeters (ZDC) Technical Design Report (LHCC 99-20)*