CERN/LHCC 96-28

LHCC 23

5 June, 1996

LARGE HADRON COLLIDER COMMITTEE

Minutes of the twenty-third meeting held on Thursday, 30 May 1996

CLOSED SESSION :

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

*) Part time

Apologies: R.J.Cashmore, C.Dionisi, A.Schopper

1. The minutes of the twenty-second LHCC meeting (LHCC 96-24 / LHCC 22) were approved without amendment.

2. C.Llewellyn Smith summarised the status of negotiations with non-member states.

3. REPORT FROM ALICE

J.Schukraft presented a status report on ALICE, covering the evolution of collaboration membership and responsibilities, and the current status and plans for particle identification and the muon arm.

4. REPORT FROM THE ALICE REFEREES

The committee heard a report from the ALICE referees on progress in reviewing the Technical Proposal, and on prospects for dilepton physics in the light of recent experimental results.

The LHCC noted the progress made on particle identification and the muon arm, and expressed satisfaction at the plans presented by the collaboration, which should lead to the submission of a muon arm addendum to the Technical Proposal by 15 October 1996.

A presentation on the RHIC experimental programme will be organised at a forthcoming LHCC meeting.

5. DISCUSSION OF POSSIBLE FURTHER PHYSICS EXPERIMENTS

J.Ellis reminded the committee of the presentations given at the workshop of 29-30 November 1994 (LHCC 94-44).

The LHCC recalls its statement at the 19-20 January 1995 meeting (LHCC 95-03), concerning the physics interest of diffraction and related studies:

"The LHCC noted the interest in diffraction, and expects that such studies may also form part of the LHC experimental programme. The committee encourages interested parties to work together on an integrated approach towards this physics, whilst bearing in mind the LHC physics priorities already established."

The LHCC urges that any new experimental initiative should be consistent with the restricted resources likely to be available, and combined as far as possible with one of the foreseen experiments.

6. REPORTS FROM THE ATLAS AND CMS REFEREES

The committee heard reports from the ATLAS and CMS referees, with a review of progress towards milestones. It was agreed to set a date of 3 February 1997 for the collaborations to submit their reports to the LHCC Costs Review Group CORE.

The referees also reported on R&D proposal P62 for further work on radiation hardening of silicon detectors, based on a joint effort by ATLAS and CMS (LHCC 96-23 and addendum LHCC 96-27). They felt that this represents a promising approach to an important and ambitious goal. The LHCC recommends the approval of the project for one year.

The committee had received a request for a muon plus source test facility (LHCC 96-26). The ATLAS and CMS referees reported on their discussions with the collaborations. The LHCC concurs with the need for a facility of this type in order to make large scale and system tests in conditions similar to those anticipated in the experiments. An implementation plan including justification for running time requests should be submitted to the SPSLC and the CERN management.

7. OTHER BUSINESS

L.Foa reported that the new advisory bodies discussed earlier are now being set up. The LHCC consultants group LCG will assist the referees in reviewing the technical design reports. The initial membership has been agreed and letters of invitation will be sent by the Director General shortly. The LHC computing and electronics boards LCB and LEB will be chaired by M.Mazzucato and P.Sharp respectively, and members have been nominated by the collaborations. The final composition will be decided shortly and first meetings are planned in the coming weeks.

Due to the forthcoming retirement of P. Lazeyras, the Magnet Advisory Group will be chaired in future by T. Taylor (CERN).

The cancellation of the July meeting of the LHCC is confirmed.

8. DATES FOR 1996 MEETINGS

29-30 August

31 October - 1 November

The LHCC received the following documents

o ROSE collaboration: Proposal for further work on radiation hardening of silicon detectors (LHCC 96-23 / P62)

o CMS collaboration: Muon+source test facility request (LHCC 96-26)

o ROSE collaboration: Addendum to proposal LHCC 96-23 (LHCC 96-27) *

* Restricted circulation only.