CERN/LHCC 96-31

LHCC 24

9 September, 1996

LARGE HADRON COLLIDER COMMITTEE

Minutes of the twenty-fourth meeting held on Thursday, 29 August 1996

CLOSED SESSION :

Present: J.Bernabeu, R.J.Cashmore, L.DiLella, C.Dionisi, P.J.Dornan, J.Ellis, J.Engelen, L.Foa, U.Goerlach, G.Goggi, A.Golutvin, D.Hartill, E.Iarocci (Chairman), P.Igo-Kemenes, C.Llewellyn Smith*, N.McCubbin, H.Montgomery, A.Schopper, A.Schwarz, D.M.Sendall (Secretary), M.Spiro, M.Turala, H.Wenninger*, D.O.Williams, G.Wormser.

*) Part time

Apologies: L.R.Evans, K.Nishikawa, K.Potter

1. The minutes of the twenty-third LHCC meeting (LHCC 96-28 / LHCC 23) were approved without amendment.

2. C.Llewellyn Smith summarised the promising situation with regard to potential non-Member State funding for the LHC project. On the other hand, the German government had requested a reduction in their contribution to the CERN budget. This request is currently under discussion. The Director General intends to advance the schedule for the 1997 project review as far as possible.

3. REPORTS ON R&D FOR LHC-B

T.Nakada gave a report on the status of research and development activities for LHC-B (LHCC 96-30). This covered the magnet and the interface to the LHC, the tracking and muon systems, the calorimeter system, trigger and data acquisition, and the aerogel-gas RICH system. He outlined the contributions of the different collaborating institutes.

The committee heard a report from the LHC-B referees. They reviewed progress towards the goals outlined in the original paper by the collaboration (LHCC 96-1), which sets out a two-year programme of R&D.

The LHCC was pleased with the report on the progress of the R&D programme for LHC-B presented by T. Nakada. Based on this report, the committee feels that the collaboration is now in a position to prepare a detailed R&D plan for the RICH detectors. This document should describe the programme in detail and include clear milestones, along with levels of effort at the participating institutions. Successful completion of the R&D described in this plan would then provide the scientific basis for the preparation of the technical design proposal for this key detector system. The committee looks forward to a similar evolution in the area of the trigger and data acquisition system, which is at an earlier conceptual stage.

4. REPORT FROM THE LHCC COMPUTING BOARD

M.Mazzucato reported on the Padova workshop on computing for the LHC, and summarised the main issues raised. An intensive effort is under way on the ATLAS and CMS computing technical proposals. A number of common issues are under discussion between the collaborations. Software development and collaborative computing were identified as key problem areas. The workshop was judged to be a success, and the LCB proposes to repeat it each 1-2 years in alternation with CHEP. M.Mazzucato also outlined the computing milestones and management structures of ATLAS and CMS.

The mandate and composition of the LCB were presented. The LCB will review existing R&D projects, monitor computing technologies and identify subjects where common solutions might be feasible: a number of these were proposed at the first meeting.

The LHCC agreed to discuss reviewing procedures for the computing technical proposals at their next meeting. L.Foa thanked those involved in the organisation of the workshop and the launching of the LCB. Particular thanks are due to J.Harvey, whose work with the LCRB had prepared the ground for the current efforts.

5. SUSY WORKSHOP

J.Ellis presented a tentative agenda for the one-day supersymmetry workshop on 30 October 1996. This would include three or four talks each by ATLAS and CMS, as well as contributions on status and prospects for LEP-2 and the Tevatron, cosmological searches and theoretical expectations. To prepare for the latter, there will be a one-day theoretical meeting on 29 October.

J.Ellis also reported on highlights from the 1996 Snowmass workshop on new directions for High Energy Physics. Their SUSY-LHC subgroup had concluded that the LHC could discover supersymmetry for gluino masses of less than around 2 TeV, and also that some precision measurements would be possible.

6. REPORT FROM THE CMS REFEREES

The committee heard a report from the CMS referees which dealt with progress on milestones in the tracking system, and reported on developments in the magnet design.

7. REPORT FROM THE ATLAS REFEREES

The committee heard a report from the ATLAS referees. A magnet review has been undertaken by the collaboration with the help of outside experts.

8. TEST BEAMS

A. Schopper presented the status of tests in 1996 and the draft version of the SPS machine schedule for 1997. He discussed the availability of SPS test beams in future, after the closure of the West Area at the end of this year.

LHC-B has requested a dedicated test beam area at the SPS. A possible solution would be to use the X7 beam in the West area. The LHCC took note that this solution is acceptable to LHC-B given that the energy of the X7 beam will be upgraded to 200/250 GeV during the 1997-1998 shutdown.

9. PRESENTATION ON THE RHIC EXPERIMENTAL PROGRAMME

T. Ludlam (BNL) presented the current status of the RHIC experimental programme. He gave an overview of the project, possible physics signatures, the two main detectors STAR and PHOENIX, and the smaller specialised experiments PHOBOS and BRAHMS. Full-scale physics is planned for Autumn 1999.

10. REPORT FROM THE ALICE REFEREES

The committee heard a report from the ALICE referees. The coverage of possible QGP signals by the large RHIC experiments and ALICE was briefly reviewed.

Work on the muon arm was reviewed. Substantial progress has been achieved, and the addendum to the technical proposal is expected by 15 October.

There was some discussion of jet quenching, where recent calculations suggest that large signals may be detectable. Further studies in this area would be of interest.

11. MEMBERSHIP OF THE LHCC

R.J.Cashmore, L.DiLella, P.J.Dornan and P.Igo-Kemenes are retiring from the Committee on 30 September. In the interests of continuity, the retiring members are invited to attend the 31 October - 1 November meeting.

The following new members have been appointed from 1 October:

B.Foster, H.Kolanoski, A.Read.

The CERN membership will be decided shortly.

The Committee took note that the Chairmen of the LCB and LEB will attend as ex officio members of the LHCC.

12. DATES FOR 1996 MEETINGS

31 October - 1 November

13. TENTATIVE DATES FOR 1997 MEETINGS

23 - 24 January

13 - 14 March

5 - 6 June

10 - 11 July

4 - 5 September

5 - 6 November

The LHCC received the following document

o LHC-B collaboration: Status of the Research and Development Activities for the LHC-B Experiment (LHCC 96-30) *

* Restricted circulation only.

D. M. Sendall

E-mail: LHCC.Secretary@CERN.CH

Tel. 74968

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

Janet.Grant@CERN.CH