Difference between revisions of "GlueX Offline Meeting, February 22, 2012"

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(Tracking)
(Reconstruction Output Format: all)
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Simon told us about [https://mailman.jlab.org/pipermail/halld-offline/2012-February/000871.html his recent change to the tracking code]. Simple version [oversimple?]: FDC hits are no longer used by the CDC track factory.
 
Simon told us about [https://mailman.jlab.org/pipermail/halld-offline/2012-February/000871.html his recent change to the tracking code]. Simple version [oversimple?]: FDC hits are no longer used by the CDC track factory.
  
==Reconstruction Output Format: all==
+
==Reconstruction Output Format==
 +
 
 +
DST format, exists, starting point, uconn, default, collaboration support, at least this one
 +
 
 +
analysis should take place with object in DANA
 +
 
 +
high level objects, DST should have minimal info to allow re-creation, need not, should not 1 to 1 correspondence between DST tags and analysis objects. some computation may be required
 +
 
 +
focus on our design on the interfaces, re-work DST and lower level objects to support those interfaces.
 +
 
 +
design efforts have been separate, but no reason that these roles cannot be filled
 +
 
 +
some tweaking and iteration will be necessary
 +
 
 +
We talked about being able to make say ROOT trees from dst's
 +
Matt: root trees from data objects, DST's to provide data to create said objects
 +
 
 
==[https://mailman.jlab.org/pipermail/halld-offline/2012-February/000859.html EventStore]==
 
==[https://mailman.jlab.org/pipermail/halld-offline/2012-February/000859.html EventStore]==
  

Revision as of 18:38, 22 February 2012

GlueX Offline Software Meeting
Wednesday, February 22, 2012
1:30 pm EST
JLab: CEBAF Center F326

Agenda

  1. Announcements
    1. Single-track jobs running: Simon, Mark
  2. Review of minutes from the last meeting: all
  3. Reconstruction sub-group reports
    1. Calorimeters
    2. Tracking
    3. PID
  4. Offline Software Review Planning
  5. Reconstruction Output Format: all
  6. EventStore
  7. Action Item Review
  8. Review of recent repository activity: all

Communication Information

Video Conferencing

Slides

Talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2012-1Q on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2012-1Q/ .

Minutes

Present:

  • CMU: Will Levine, Curtis Meyer
  • FSU: Nathan Sparks
  • IU: Ryan Mitchell, Kei Moriya, Matt Shepherd
  • JLab: Mark Ito (chair), Simon Taylor, Beni Zihlmann

Announcements

Simon and Mark reported that single-charged-track diagnostic jobs are now running nightly on an ifarm machine at JLab. The success probability is still a bit low (due to Computer Center controls of multiple jobs) and adjustments will have to be made, but some results can be seen at the top-level web page.

Review of minutes from the last meeting

We reviewed the minutes from the previous meeting, from before the collaboration meeting, without significant comment.

Reconstruction sub-group reports

Calorimeters

Will gave a summary of his work thus far characterizing photon reconstruction in b_{1}\pi events. See his wiki page for details and plots. He studied the BCAL and FCAL separately. In the BCAL he sees about a factor of three more photons reconstructed than thrown but a simple timing cut eliminates most of the spurious reconstructed photons, leaving the right number and a reasonable energy spectrum. In the FCAL there is a similar multiplication in photons from generated to reconstructed, but timing only removes half of the total (a larger factor is desired). Will is investigating these issues further.

Tracking

Simon told us about his recent change to the tracking code. Simple version [oversimple?]: FDC hits are no longer used by the CDC track factory.

Reconstruction Output Format

DST format, exists, starting point, uconn, default, collaboration support, at least this one

analysis should take place with object in DANA

high level objects, DST should have minimal info to allow re-creation, need not, should not 1 to 1 correspondence between DST tags and analysis objects. some computation may be required

focus on our design on the interfaces, re-work DST and lower level objects to support those interfaces.

design efforts have been separate, but no reason that these roles cannot be filled

some tweaking and iteration will be necessary

We talked about being able to make say ROOT trees from dst's Matt: root trees from data objects, DST's to provide data to create said objects

EventStore

Simon made a change to the track finding code for the cdc, see his message

random access needs to be explored 10's of TB level at cleo-c access to large amount of disk space