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Agenda of the BaBar Operations Workshop

At SLAC, Feb. 14 to 15

Detector Monitoring, Alarms and Interlocks

Friday 9:00 to 12:30 SCS 3rd floor conference rooms


Report from the Paris workshop     George Vasileiadis
Description of the SIAM            Perry Anthony
General Montioring Board           Tom Meyer
Summaries of requirements from
the systems.                       
SVT                                David Kirkby       
DCH                                David Coupal for Janice McKenna
DIRC                               George Vasileiadis
EMC                                Tom Meyer
IFR                                Pierluigi Paolucci 
Discussion of common needs.
Database issues                    Gerry Abrams



Friday 14:00 to 17:00 Orange Room


Machine operation                   Tom Mattison
Calibration software tools          Gregory Dubois-Felsmann
Calibration questionnaire example   David Brown
System calibration scenarios        
SVT                                 Natalie Roe
DCH                                 Gabriella Sciolla
EMC                                 John Dowdell
IFR                                 Nicola Cavallo
Discussion of common requirements

Detector Downtime

Saturday Feb. 15th 9:00 to 12:00 Orange room


Detector access                      Harvey Lynch
Machine operation (macrostructure)   Tom Mattison
Example data loss study (DCH)        Walt Innes
Physics impact report                Paul Harrison
CAN, design for reliability          Tom Meyer         
MTBF reports from systems            
SVT                                  Mark Nyman
DIRC                                 Guy Wormser
EMC                                  John Dowdell
IFR                                  Nicola Cavallo                                  
Reconstruction reports from systems  
DCH                                  Steve Wagner
DIRC                                 Guy Wormser
EMC                                  Helmut Marssike
IFR                                  Nicola Cavallo
Discussion on how to proceed.

Goals of the workshop:

Detector Monitoring, Alarms, and Interlocks.

Monitoring is intended to mean keeping track of things like temperatures, pressures, and voltages. It does not include data monitoring. The goal is to establish what needs to be monitored, how often, and how long the results need to be remembered. In the case of alarms and interlocks we want accumulate an inventory of what's needed. This information will aid the database designers, and give the hardware folks an idea of how much of everything is required. This time will also be used to bring people up to date on the descriptions reached in the Paris workshop.
The information needed from the system representatives includes lists of how many of what needs to be monitored, how often they need to be checked, what kind of alarms (hardware) and software alerts are needed, how long and how much needs to be remembered.


This means calibration in a broad sense. Any test or calibration which involves the data acquisition system in a mode other than standard data taking is included. The goal is to establish the necessary and sufficient functionality of the common calibration hardware and software, and to estimate the data loss due to calibration activities.
The information needed from system representatives includes scenarios for all anticipated calibrations and tests. Estimates of their frequency. What are their requirements?
A revised version of the calibration questionnaire is now available. See also the announcement. There is too much in the questionnaire for you to complete before the meeting, but you can get a head start by thinking out your calibration scenario in some detail. How often do you need to calibrate (or test)? What conditions are required? What is your signal source? How many pulses per minor cycle? What happens during a pulse? at the end of minor cycle? What needs to change between minor cycles. How many minor cycles. Similarly for major cycles. What happens at the end of a major cycle? Please be prepared to walk us through your calibration(s). If you have not already done so, you should join the Calibration HyperNews forum.


The goal is to estimate the expected data loss due to equipment failure. The effort should aid system designers in their efforts to minimize failure rates.
The information needed from system representatives includes: MTBF reports with failure impacts, e.g., what channels die if resistor X fails. The effects of the most likely failures on reconstruction (at this time this will be from informed guesses). Guesses on the impact of the reconstruction degradation on physics.
The Reliability page has links to Dave Nelson's analysis of the DCH. This can serve as a guide to other efforts. This analysis does not group the failures by the extent of the malfunction each would cause. This last step is needed to evaluate their impact. BaBar note 353 relates failures to data loss.