GlueX Offline Meeting, September 7, 2011

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GlueX Offline Software Meeting
Wednesday, September 7, 2011
1:30 pm EDT
JLab: CEBAF Center F326

Agenda

  1. Announcements
  2. Review of minutes from the last meeting: all
  3. Compressed Data Format Update (Richard or Igor)
  4. BCAL Reconstruction Update (Will)
  5. Reconstruction chi-squared/uncertainty update: Paul Mattione.
  6. Discussion of Reconstruction Tasks and Topics for Further Development
  7. Software work day at the Collaboration Meeting?
  8. Other items

Communication Information

Telephone

To connect by telephone:

  1. dial:
  2. enter access code followed by the # sign: 3421244#

Video Conferencing

Slides

Talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2011-3Q on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2011-3Q/ . You have to be a member of the "halld" Unix group to do this.

Minutes

Present:

  • CMU: Will Levine, Paul Mattione, Curtis Meyer
  • IU: Ryan Mitchell, Kei Moriya, Matt Shepherd (chair)
  • JLab: Mark Ito, David Lawrence, Dmitry Romanov, Simon Taylor, Elliott Wolin, Beni Zihlmann
  • UConn: Igor Senderovich

Announcements

Elliott issued a head-up for the need for creating digitized data for online testing from Monte Carlo events. He will write-up requirements for this.

Review of minutes from the last meeting

We skimmed the minutes from the August ??? meeting.

Mark reminded us that we still need a solution for putting large magnetic field maps into the CCDB.

Compressed Data Format Update

Igor reported that Richard is working on the code based on feedback received at the last meeting.

Reconstruction chi-squared/uncertainty update

Paul presented a ??? wiki page summarizing work to study reported errors from the FCAL, BCAL, and TOF.

See his page for details.

Also, Curtis posted a [??? document on the DocDB ]from PANDA, describing the scheme for their central tracking.

their thier



simon: chisq problems, track finding stage, could be improved forward direction number of candidates with wrong charge hypothesis, chisq of fit is bad mark: may be a marker, not a cause

Will, BCAL, doing ok for single photon events, moving toward 1234 segmentation, work in progress

1234 can be changed easily, matt, calibration may not be correct, geometry file to change segmentation

Paul, item 5, wiki page • uncertainties on bcal fcal tof • single photon, pion events • compare reconstructed vs generated

need convention for time reported for all detectors, inner radious, front face

tracking simon pid paul photon matt

brainstorm

many more reconstructed 

0 - 10.5 degrees

big overshoot at downstream end of bcal Beni's b1pi wiki page

number of protons, reconstruction efficiency seems very low compared to pi + at angle of 30 see same amount of protons and pions

will thinks taht the problem was not as bad a few months ago

new segmentation for the bcal 

overall reconstruction in b1pi

cause of complete failure of track fitting and finding

particle id timing shift in time of flight timing shift in fcal

paul will present a design for how tof beni present hermes scheme

mark will add items to list conveners will organize the list

New Action Items

  • Write requirements for digitizing Monte Carlo data for online testine. -> Elliott
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