LHCC Minutes 3-4 September 1998

CERN/LHCC 98-29
LHCC 36
16 September, 1998

LARGE HADRON COLLIDER COMMITTEE

Minutes of the thirty-sixth meeting held on Thursday and Friday,
3-4 September 1998

OPEN SESSION :

1. Status of the LHC project: C.Llewellyn Smith

2. ALICE status report: J.Schukraft

3. ALICE HMPID Technical Design Report (LHCC 98-19): G.Paic, F.Piuz

CLOSED SESSION :

Present: B.Adeva, G.Altarelli, W.Bartel, J.Carr, R.Cashmore, J.Engelen (Chairman), A.Ereditato, L.Fo, B.Foster, G.Goggi*, D.Hartill, R.Kephart, H.Kolanoski, N.McCubbin, K.Potter, M.Price* (representing G.Goggi), D.Ressing, G.Rolandi, A.Rostovtsev, A.Schwarz, D.M.Sendall (Secretary), P.Sharp*, M.Spiro, E.Tsesmelis.

*) Part time

Apologies: L.R.Evans, M.Kasemann, S.Komamiya, C.Llewellyn Smith, J. May, M.Mazzucato, A.Read, H.Wenninger.

(J-J.Blaising was present for point 3) .

1. The minutes of the thirty-fifth LHCC meeting (LHCC 98-22 / LHCC 35) were approved without amendment.

2. REPORT FROM THE ALICE REFEREES

The committee heard a report from the ALICE referees, concentrating on preliminary reactions to the Technical Design Report for the High Momentum PID. The referees plan to make a full report at the next meeting of the LHCC.

3. REPORT FROM THE ATLAS REFEREES

The committee heard a report from the ATLAS referees, covering their review of the ATLAS Pixel TDR performed with C.Damerell and A.Menzione as consultants, and of the First-level Trigger TDR performed with J-J.Blaising and D.Ressing as consultants.

The referees also reported on the status of liquid argon end-cap and barrel module-0 tests. The collaboration has requested beam time for such tests. The LHCC considers beam tests of calorimeter modules built with production components to be worthwhile, particularly with a view to reducing risks for the final detector.

4. REPORT FROM THE COST REVIEW GROUP

W.Bartel reminded the LHCC of the general reviewing procedure of CORE. He reported on the evaluation by CORE of the ATLAS Pixel and First-level Trigger projects, based on the TDRs and updated cost planning documents. CORE considers that the cost estimates for these two detectors are reasonable and have a firm basis in prototyping and industrial offers. The estimates are compatible with the existing cost ceilings. Development of radiation-hard components will need to be monitored. The LHCC endorses this evaluation.

W.Bartel also reported on the cost evaluation of the LHCb Technical Proposal. The estimates benefit from experience at ATLAS, CMS and HERA-B, which reduces uncertainties. Re-use of existing equipment makes an important contribution to LHCb. CORE considers that the detector can be built within the cost ceiling to meet the physics requirements of LHCb. Estimates of manpower requirements have also been made, which match the manpower likely to be available in the collaborating institutes.

The LHCC recalled that its recommendations on the LHCb Technical Proposal at the July 1998 meeting (LHCC 98-22 / LHCC 35) were "subject to the successful completion of the pending CORE review" . The LHCC notes that this condition has now been met.

A written report will be submitted by CORE to the LHCC shortly. W.Bartel drew the attention of the LHCC to the fact that the major activities of CORE would soon be drawing to a close. He suggested that the time is ripe for a change of organisation in the next phase of the collaborations' activities.

5. ATLAS PIXEL DETECTOR TECHNICAL DESIGN REPORT

The LHCC has completed its scientific, technical, and cost evaluation of the ATLAS Pixel Detector TDR submitted in May 1998. The committee was impressed by the quality of the work and rapid technical progress presented in the TDR, and congratulates the collaboration. The TDR describes a powerful pixel detector that can survive the harsh operating conditions of the LHC and will form an integral part of the planned ATLAS Inner Detector.

The committee has no major concerns; however an ancillary document (LHCC 98-31) contains items of lesser concern as well as a list of agreed milestones for monitoring the progress of the project. The committee is pleased to note that the beam pipe, pixel B-layer and vacuum are being studied further with the aim of simplifying the support structure and avoiding bake-out of the beam pipe in that region.

The LHCC review was not an engineering review, although some engineering aspects of the project were presented and discussed with the referees. It is recommended that ATLAS conduct an independent review of engineering designs. Written reports should be made available to the LHCC through its referees.

Recommendation

The LHCC recommends general approval of the ATLAS Pixel Detector Technical Design Report. The LHCC considers the schedule given in the TDR and the revised list of milestones 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 FIRST-LEVEL TRIGGER TECHNICAL DESIGN REPORT

The LHCC has completed its scientific, technical, and cost evaluation of the ATLAS First-level Trigger TDR submitted in June 1998. The committee was impressed by the quality of the work presented in the TDR, and congratulates the collaboration. The TDR describes a robust system for providing the lowest level of the ATLAS trigger. Simulations indicate that it will provide good triggering efficiency for the physics processes of interest to ATLAS, while at the same time providing adequate rejection against known backgrounds.

The committee has no major concerns; however an ancillary document (LHCC 98-32) 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 with the referees. It is recommended that ATLAS conduct independent reviews of engineering designs prior to construction of this system. Particular attention should be paid to integration issues. Written reports from these reviews should be made available to the LHCC through its referees.

Recommendation

The LHCC recommends general approval of the ATLAS First-level Trigger Technical Design Report. The LHCC considers the schedule given in the TDR and the revised list of milestones in the ancillary document to be reasonable. They will be used by the committee to measure and regulate the future progress of the project.

7. REPORT FROM THE CMS REFEREES

The committee heard a report from the CMS referees. The collaboration is preparing a document summarising all the milestones. A choice has been made of APDs for the electromagnetic calorimeter. The status and plans for the software were presented.

8. REPORT FROM THE LHCC ELECTRONICS BOARD

P.Sharp reported on the work of the LEB, covering a number of topics discussed at their recent meetings: further details can be found in the LEB minutes. The LEB heard a status report on the DMILL process: good progress has been made and the LEB is now confident that three radiation-hard processes are available. The status of frame contracts for radiation-hard ASICs was also reviewed. The LEB heard a report on the CERN LHC Integrated Circuit Test Lab, which is working successfully and already reserved for the next six months. Attention was drawn to the need for continued longer-term support for this critical facility.

The LEB reviewed the RD49 project on radiation-tolerant electronics for LHC. Work on 0.25 micrometer technologies looks very promising. The situation of COTS (Commercial Off The Shelf) components was also reviewed. Here, despite an increasing level of awareness of the problems, the LEB felt that some important issues have yet to be adequately addressed. Advantage could usefully be taken of a consultancy contract with Sandia National Laboratories.

Preparations are well advanced for the Rome workshop on electronics systems issues, to be held on 21-25 September 1998. P.Sharp reviewed the status of the LEB programme of work after two years of operation. He noted the real effort to find common solutions on the part of LEB members, most of whom are from LHC collaborations. Outstanding issues include radiation tolerant electronics, project and risk management, and slow controls systems.

9. REPORT FROM THE MOEDAL REFEREE

The committee heard a report from the MOEDAL referee, giving the collaboration's replies to a number of questions. The collaboration will be invited to make a presentation at a forthcoming open session of the LHCC. The question was raised of the potential for monopole discovery by CMS and ATLAS; this merits further study.

10. PROPOSAL FROM THE RD39 COLLABORATION

The RD39 project as such is considered to be essentially concluded. However, the collaboration proposes to investigate the operation of solid-state detectors at liquid nitrogen temperatures. The LHCC agrees that the proposal is of potential interest, and will appoint a referee to consider further steps.

11. REPORT FROM THE TOTEM REFEREE

The committee heard a report from the TOTEM referee following the recent memorandum from the collaboration (LHCC 98-24). The LHCC notes the physics interest of integrating TOTEM with a 4pi experiment if possible. The collaboration is therefore encouraged to make further studies of installation at collision point 5 (with CMS), with a view to making a proposal early in 1999. These studies should be undertaken in close collaboration with the machine people concerned.

12. REPORT FROM THE RD42 REFEREE

The committee heard a report from the RD42 referee. Substantial progress has been made in achieving the milestones set at the previous review. The referee recommends that the collaboration should carry out their proposed further programme of work, with emphasis on pixel detectors and radiation-hard electronics. They should also obtain price estimates and study production yields. The R&D programme should be completed by the end of 1999.

The LHCC agrees to the continuation of the project on this basis.

13. TEST BEAMS

E.Tsesmelis presented the proposed 1999 SPS and PS schedules, which have been presented to the SPSC and discussed with the machine groups. They are in accordance with the report "CERN energy budget and accelerator schedules" (CERN AC Note 9801). He also summarised the updated 1998 SPS and PS programmes.

Both ATLAS and CMS have made requests for tests with a 25 nsec bunched beam. The LHCC acknowledges the usefulness of such tests, and encourages the collaborations to agree on a common timetable for their requests.

14. OTHER BUSINESS

G.Altarelli reported that the workshop on Standard Model Physics will now be held in May 1999: preparation will begin in October-November 1998.

The collaborations will be invited to present the status of their software efforts to the LHCC in Spring 1999.

15. MEMBERSHIP OF THE LHCC

The Chairman thanked D.Hartill, N.McCubbin, A.Schwarz and M.Spiro, who are retiring from the Committee on 30 September. In the interests of continuity, the retiring members are invited to attend the 22-23 October meeting.

The following new members have been appointed from 1 October:

J.Lee-Franzini, P.Roudeau, H.Schellman, G.Zech.

16. DATE FOR 1998 MEETING

22-23 October

17. PROVISIONAL DATES FOR 1999 MEETINGS

21-22 January

25-26 March

27-28 May

8-9 July

2-3 September

4-5 November

The LHCC received the following documents

o ALICE Collaboration: High-Momentum PID Technical Design Report (LHCC 98-19 / TDR 1)

o TOTEM Collaboration: Memorandum to the LHCC (LHCC 98-24)

o RD39 Collaboration: Addendum to proposal DRDC P53 (LHCC 98-27)

o Magnet Advisory Group MAG: Interim report to the LHCC (LHCC 98-30) *

* 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