Updated:  June 12, 1998

Committee Charge for the EM Calorimeter Trigger Final Design Review
===================================================================

Review to be held on Thursday, June 18, 1998, at SLAC.

Introduction
____________

The design of the Level 1 EM Calorimeter Trigger subsystem was
reviewed in November, 1997.  At this review, the Committee will be
presented with test results of the prototype system including the
prototype Trigger Processor Board, the most complex part.  This Final
Design Review is held slightly early since the customary testing
program is not yet complete.  That is, pre-production Trigger
Processor Boards are not yet available since they will not be
fabricated until after this review; however, to plan for success, the
Calorimeter Trigger group is proposing to produce the full final
number of boards (15).  

As a consequence, the scope of this review is the complete two-step
process including pre-production testing and production article
validation.  The Calorimeter Trigger algorithm is part of, and
controls, a large portion of the critical part of the fixed-length
Level 1 Accept signal latency chain. The latency available to the
trigger has shrunk as a result of a recent Silicon Vertex Tracker
front-end electronics change.  It necessary that the Calorimeter
Trigger deliver signals, in parallel with the Drift Chamber Trigger,
within the allotted time.

Specific Charge
_______________

At this review, the Committee should consider whether testing has
demonstrated that the design is ready for fabrication of fifteen
pre-production units.  The committee can expect the Calorimeter
Trigger group to provide information on the following areas, which
should be investigated:

 (1) any significant changes to the design since the last review,
 (2) the response to the report of the last review,
 (3) the testing of the algorithms and other functions of the
     prototype Trigger Processor Board,
 (4) the testing of the functionality of all other components,
 (5) the testing of all the internal and external interfaces of the
     Trigger Processor Board and other components,
 (6) the proposed plan for testing the pre-production models,
     including a checklist for acceptance of the pre-production
     model as a production model,
 (7) the proposed plan for testing and validating the production
     units,
 (8) a new grounds-up estimate of the full Level 1 latency path from
     detector, through the trigger and to the front end electronics,
     and,
 (9) the relative priority of delivering a well-tested, reliable
     product and the need for a timely delivery to BaBar.

Logistics
_________

The committe is asked to provide a concise report in a short time in
order to reduce its work for itself and in order to give rapid
feedback to the Calorimeter Trigger group which faces a tight schedule
relative to the rest of Level 1.  To this end, please circulate a
draft report for _factual_correction_ by Paul Dauncey and the
Calorimeter Trigger group by Monday, and deliver the final copy to
Fred Kral, jfkral@lbl.gov, by Tuesday 5pm, June 22, 1998.

Please include in the report _only_ your concerns and advice to the
Calorimeter Trigger group and BaBar management.  If the committee
divides up the tasks and each committe member writes a paragraph, the
report should not be a lot larger than one page.

Information
___________

Documentation and agenda are the responsibilities of the Calorimeter
Trigger Group.  They are being assembled at
 http://www.slac.stanford.edu/BFROOT/doc/Trigger/98/emt-fdr/emtfdr.html

Please contact Paul Dauncey, P.Dauncey@ic.ac.uk, for details on the
schedule for distribution of materials on the Web, and the final
binders.