March 13, 2007 Software

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  1. Review minutes from February 27, 2007 Software meeting
  2. Drift Chamber Review post-mortem
  3. Priorities for CD-2
  4. Collaboration meeting agenda
  5. Computing document for 12GeV operations
  6. GEANT4 developer visit to JLab
  7. Software Coordinator Election


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Attendees: David L.(chair), Elke A., Simon T., Elliott W., Eugene C. On the Phone: Richard J., Mihajlo K.

Review minutes from February 27, 2007 Software meeting

During review of the minutes from the last meeting, Mihajlo reported that an issue with the position resolution getting very poor for low energy showers in the FCAL has been solved.

Richard noted that a new document on studies of the diamond radiator has been placed on the web.

Drift Chamber Review post-mortem

We discussed the outcome of last week's DC review. The main points were:

  • Material in detector
  • Simulation/Tracking

For the second point, they were specific in their comments saying that we need at least 3 people with an integrated manpower committment of 1.5 FTE for the tracking code.

Elke's message

Priorities for CD-2

We discussed what was going to be needed for the CD-2 review. Elke noted that we are still not 100% sure what the scope of the CD-2 review will be. The scope may be affected by the results of the recent DC review. Right now, we just don't know.

Regardless, from the point of software, we must assume they will focus on design points that require validation through simulation. Since time is short, there are 3 main topics that must be addressed in the short term:

  • Pattern recognition in tracking
  • PID
  • BCAL reconstruction

Collaboration meeting agenda

It was suggested we add Eugene to the software agenda to discuss some of the work he has done on the PID issues.

Computing document for 12GeV operations

David reported that the IT division (Chip Watson) is trying to put together a white paper to outline the computing needs for all 4 halls during 12GeV operations. Since no money is allocated for the computing in the 12GeV project, computing must come from operations. The purpose of this paper is to provide a plan that shows it can be done within those budget constraints. This document will be developed over the next 1.5 months.

During this discussion, Elliott asked about the apparent descrepancy between the 2002 design document which assumes a 5kB/event size and Richard's recent spreadsheet which uses 10kB/event. Richard explained that he simply assumed that M.C. data was twice as big since it included both hit and truth information.

Richard commented that we want to make sure that the computing plan that JLab writes up includes empahsis on the need for GRID tools.

GEANT4 developer visit to JLab

Two of the lead developers for GEANT4 are currently visiting JLab. They are available for questions from the JLab G4 user community. Mark Ito has been trying to take advantage of their time and has had nearly exclusive access to them during their visit. A meeting was also scheduled by Paul Gueye and Mark Ito with Lary Cardman and the G4 developers to discuss JLab involvement with the G4 collaboration. David also attended this meeting.

Mark Ito gave a short presentation to the G4 developers earlier in the morning to get their opinion on the XML-based scheme. He volunteered to give the same presentation to the Hall-D Software group in the near future.

Software Coordinator Election

It was suggested that we hold an election for the Software Coordinator and establish a precedent of having the position served for 2-year terms. Elliott volunteered to run the election. He will advertise it this week and will announce the results at the next software meeting.

Action Items