CERN/LEB 97-10/M5
               Minutes of the 5th LHC Electronics Board held on 31st October 1997.



F. Corsi, C. Decosse point 3), Ph. Farthouat, L. Foa point 5),
G. Goggi point 5), G. Hall, A. Johnston point 3), M. Letheren, E. Petrolo,
S. Quinton, P. SharpChairman), G. Stefanini, M. Turala.
Apologies:          P. Borgeaud, F. Formenti, H. Dijkstra, V. Radeka, W. Smith, U. Straumann.   1. The minutes of the 4th meeting held on 20th May 1997 were distributed with copies of the overheads
     from the chairmanís report to the LHCC.

2. There were no matters arising.

3. Discussion on the outcome of the 1997 LEB Workshop London) and planning for the
   1998 Workshop Rome).

The London workshop, held at Imperial College, was considered to have been very successful. The Board thanked Geoff Hall and all members of the local organizing committee for their smooth and efficient operation of the workshop.

Catherine Decosse and Anne Johnston then distributed the first printed copies of the workshop proceedings to all those present. The Chairman and all the members warmly thanked Piera Brambilla, Catherine Decosse and Anne Johnston for their excellent contributions to organizing and supporting the logistics of the workshop and the preparation of the proceedings. The Board was very impressed by the standard of the proceedings, their completeness, and the speed with which they had been published.

A number of critical issues were identified at the workshop:

The Board identified several improvements to be taken into account in organizing the next workshop. The plenary sessions, which in London had been reserved mainly for invited speakers from industry, should be expanded to address issues of common interest. The organizing committee should work actively with the LHC experiments, through project leaders, to ensure the submission and selection of sets of) papers giving a balanced representation of all detectors, identifying common problems and addressing important system aspects.

Emilio Petrolo confirmed that the next LEB Workshop will be hosted by the University of Rome La Sapienza), 21-25 September 1998.

4. RD16 Status Report: FERMI - A digital front-end and readout microsystem for calorimetry at LHC)

The Board recognizes the impressive amount of work that has been carried out by the collaboration with the aim of developing a set of generic building blocks for the construction of the front-end and readout electronics for calorimeters.

The extensive expertise gained during the project and the building blocks that have been developed have led to the current architecture and implementation adopted as baseline by the CMS experiment. However, the baselines of the other LHC experiments are based on different approaches. The know-how and building blocks of RD16 should now be targeted towards meeting the specific requirements of the CMS experiment.

The Board therefore recommends the formal conclusion of RD16 after the completion of existing commitments, to be accompanied by a transition of the generic developments into a focussed CMS project.

5. RD19 Status Report: Development of hybrid and monolithic silicon micropattern detectors)

The Board is highly appreciative of the excellent R&D work carried out by RD19 in the development of pixel detectors, which has led to the successful installation and operation of pixel systems in experiments. RD19 has acted as a very effective mechanism for exchange of information and experience and has undoubtedly accelerated the development of pixel detectors.

Most RD19 member institutes have now directed their main effort to the development of pixels for one of the LHC experiments. Pixel developments are based on different architectures in each of the LHC experiments and are carried out by teams that are largely independent.

Considering that dedicated pixel development teams have developed in each of the ALICE, ATLAS and CMS experiments, the Board believes that RD19 has now well served its original purpose and recommends its discontinuation as an independent generic development project. The Board congratulates the RD19 collaboration on their pioneering work, which has brought pixels up to the level of fully operational systems in experiments.

Nevertheless, much more development needs to be done before the challenging requirements for pixels at LHC can be met. The Board would therefore welcome an initiative from the LHC collaborations concerning a pixel forum for exchange of information and experience.

6. RD27 Status Report: First-level trigger systems for LHC experiments)

The Board congratulates the RD27 collaboration on the successful completion of its milestones and accepts the collaborationís own proposal to terminate the project and continue development within the ATLAS and CMS experiments. The Board has been particularly impressed by the excellent inter-experiment collaboration within RD27 and is pleased to note that collaboration and exchange will be continued on an informal ad hoc basis. The Board considers RD27 to have been a model R&D project and would like to thank the spokesman, Nick Ellis, for his role in leading it to success.

7. RD48 Milestones ROSE - R&D on silicon for future experiments)

The RD48 status report was initially presented to the LHCC in July 1997. However, in view of the close relation of RD48ís work to electronics, the LHCC decided to refer the project to the LEB for the setting of milestones for the 2nd year.

Board members reported support for RD48 from the ATLAS and CMS tracker project leaders, but also encouraged RD48 to increase their interaction with all experiments. The Board recommends that RD48 continue with the following milestones to report back by August 1998):

8. Any Other Business

A discussion took place concerning the common requirement of ATLAS and CMS for a rad-tolerant, high-speed ~ 1 Gbit/s) digital optical detector readout link. Several development efforts are in progress in different groups, but there is no overall coordination and they are technically incompatible. Standardization on a common high-speed digital link would increase procurement volumes, resulting in lower unit costs; in addition it would reduce the future resources needed for technical support and maintenance.

Provisional dates for the 1998 LEB meetings were set:

Provisional Agenda for 9 Jan meeting: