BCAL Reconstruction Meeting 2014-08-21

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Revision as of 11:08, 22 August 2014 by Zisis (Talk | contribs) (Minutes)

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Video Conferencing Information

Meeting Time: 11:15 a.m. EDT

  1. To join via a Web Browser, go to the page [1] https://bluejeans.com/907185247.
  2. To join via Polycom room system go to the IP Address: (bjn.vc) and enter the meeting ID: 907185247.
  3. To join via phone, use one of the following numbers and the Conference ID: 907185247.
    • US or Canada: +1 408 740 7256 or
    • US or Canada: +1 888 240 2560
  4. Upon connection all microphones are automatically muted. To unmute your mike on a Polycom or equivalent unit, enter *4. Unmuting on a computer is trivial as there is a microphone button than can be clicked.
  5. More information on connecting to bluejeans is available.

Participant Direct Lines

  • JLab Phone: in CC F326 is 757-269-6460 (usual room)
  • JLab Phone in CC L207 is 757-269-7084
  • Phone in the Regina Video-conference Suite is 306-585-4204


  1. BCAL Reconstruction Issues
  2. BCAL Reconstruction Algorithms
  3. Will's reconstructed energy info

Action Items

  1. Reconstruction code
    1. Sampling fraction tables
    2. Shower curvature tables: compare KLOE to IU codes: check gap in cluster handling between codes.
    3. time-walk: check fits, decide on 1 or 2 iterations)
    4. timing: extracted from F1TDC and compared to fADC
    5. z-coordinate determination from up/down amplitude ratio
    6. set variable “failures” to a number other than zero (e.g. -9999 or similar)
    7. comb code for constants to be pulled out into a database


  1. Announcements
  2. Action Items
  3. Updates
  4. Any other business


Attendees: David (JLab), Will (CMU), Tegan, Andrei, Zisis (Regina)

  1. Announcements:
    1. Zisis gave a summary on the upcoming beam plans and shift scheduler, as reported in this week's Hall D meeting.
    2. One of the new Regina grad students got her visa and will arrive in Regina on Aug. 31. The other student is still waiting for his visa.
  2. Action Items: these will be tackled in due time. Tegan is working on the timing (time walk) code. He will circulate his code, so that he and Mark Dalton can coordinate efforts on this front.
  3. Updates: (Tegan)
    1. Software: the automatic script installation of software provided by Mark Ito failed in trying to install the GlueX software on Tegan's desktop (Scientific Linux 6). Tegan had (in part manually) managed to get the software installed and working (simulations produce reasonable results), and the effort was to automate the scripts, so that the new Regina students could use them 'out of the box' for their desktops. The next steps planned at Regina are to install/run the software on our local cluster (hydra) and then on the Westgrid cluster. The tripping point of Mark's scripts was in the building of Cernlib. David confirmed how notorious this problem is and recommended the use of pre-built binaries (after the meeting he provided the location of those on CUE disks).
    2. BDT: Tegan and Justin continued working on getting the BDT trained and compared to Will's (conventional) hard cut method. The training is done on a bggen sample, which has been run through the (slightly modified) photon_discrim plugin, with the separation between signal (photons) and background done with the 'match' variable from that plugin. Initial studies show the same efficiency in the BDT as achieved in the hard cuts, but with a 10% higher purity. The truth shower did not seem to be too helpful. David suggested the DBCALIncidentParticle class in JANA that records the particle properties for all particles entering the BCAL regardless of how they were created as possibly being helpful for the BDT.
    3. Timing code: Tegan is working on the timing off the fADC towards addressing the time-walk correction studies. David suggested using the svn diff command.
  4. Any other business:
    1. With Richard Jone's help, input went into a 'White Paper' to Compute Canada regarding Canadian computational needs. 30% of the GlueX needs were requested for running on the Westgrid cluster and the request was well received and had an impact on their radar, due to the size of the request. Zisis, Andrei and Irina have Westgrid credentials and the Regina students will get theirs soon. Progress will be reported to the GlueX Collaboration.
    2. David asked if Regina manpower is coming to the lab in the fall. Zisis replied yes, with Andrei coming first for a week in early September. He will be followed by George, Zisis and students in the Oct-Nov period. No travel plans have been made yet, waiting for more precise information on the beam.