CERN/LHCC 94-36

LHCC 12

12 September, 1994

LARGE HADRON COLLIDER COMMITTEE

Minutes of the twelfth meeting held on Wednesday, 31 August 1994

CLOSED SESSION :

Present: J.V.Allaby, J.J.Aubert (Chairman), R.J.Cashmore, L.Di Lella, P.J.Dornan, P.Duinker, F.Eisele, J.Ellis, E.Fernandez, L.Foa, E.Iarocci, P.G.Innocenti, V.Khovansky, C.Llewellyn Smith*, G.W.London, G.Mikenberg, K.Potter, K.Pretzl, K.Schubert, D.M.Sendall (Secretary), M.Turala, H.Wenninger*, D.O.Williams*

*) Part time

Apologies: K.Einsweiler, L.R.Evans, K.Kajantie, S.Yamada

(M.DellaNegra, F.Dydak, H.Hoffmann, P.Jenni, J.Schukraft and T.Virdee were present for point 5).

1. The minutes of the eleventh LHCC meeting (LHCC 94-25 / LHCC 11) were approved without amendment.

2. C.Llewellyn Smith gave a brief summary of the situation of the LHC project following the June Council meeting. Discussions are continuing in preparation for a September session of Council.

3. REPORTS ON CALORIMETRY FROM THE DRDC

G.Fischer reported on electromagnetic calorimetry in RD-3 (liquid argon "accordion"), RD-33 (liquid argon "thin gap turbine") and RD-36 ("shashlik"). P.Lecoq reported on R&D in scintillating crystals and glasses by RD-18 (Crystal clear). H.Tiecke reported on RD-34 (scintillator tile hadron calorimeter with longitudinal tile configuration) and RD-40 (quartz fiber calorimetry). A.Breskin reported on RD-37 (very forward hadron calorimetry). A.Bondar reported on P57 (hadron calorimetry for high magnetic fields).

4. B PHYSICS

The referees reported on the current situation and progress in forming a new collaboration for a dedicated LHC B experiment. The LHCC appreciates the progress made in the short time available, and encourages the new collaboration to submit a Letter of Intent by 28 February 1995 following the guidelines in their recommendations (LHCC 94-26)

5. CERN SUPPORT FOR THE COLLABORATIONS

P.G.Innocenti reported on CERN participation and support for the LHC collaborations. He outlined the current situation and possible evolution in the light of the medium range plan as presented to Council in December 1993. A number of potential problem areas can already be foreseen.

6. FUTURE OPERATION OF THE LHCC

The Chairman reported on discussions with the referees, L.Foa and others regarding the best organisation for the future, especially for the evaluation of the Technical Proposals. It was generally agreed that the LHCC should be advised by small groups of experts in particular fields such as costs, magnets, detectors, engineering, electronics and computing. Details of working methods and mandates will be the subject of further discussions.

7. TIMETABLE AND FUTURE MEETINGS

J.Ellis and L.Di Lella reported briefly on plans for the 29 November workshop on further physics topics. They will present an agenda for this at the 9-10 November meeting. J.Bernabeu has agreed to be the convenor for physics with gas jets and extracted beams.

Provisional dates for meetings in 1995 were agreed.

8. MEMBERSHIP OF THE LHCC

K.Einsweiler, V.Khovansky, E.Fernandez, G.Mikenberg, G.London and K.Pretzl are retiring from the Committee on 30 September. The Chairman expressed his warm appreciation for their contribution to the work of the LHCC. The retiring members are cordially invited to attend the 9-10 November meeting. K.Pretzl has agreed to continue as a referee for ALICE in the interests of continuity.

The following new members have been appointed from 1 October:

J.Bernabeu, G.Dionisi, W.Goerlach, A.Golutvin, P.Igo-Kemenes, H.Montgomery, G.Wormser.

9. DATES FOR 1994 MEETINGS

9-10 November

29 November (workshop on further physics topics)

10. PROVISIONAL DATES FOR 1995 MEETINGS

19-20 January

29-31 March

16-19 May

6-7 July

14-15 September

16-17 November

The LHCC received the following documents*

o W.Herr: How does the number of experiments affect the maximum luminosity of the LHC (LHCC 94-32, also SL/94-42, LHC Note 280)

o LHC-B Collaboration: A Dedicated Collider Beauty Experiment for the Large Hadron Collider at CERN (LHCC 94-34)

* Restricted circulation only.