GlueX Offline Meeting, February 23, 2011

From GlueXWiki
Revision as of 16:10, 24 February 2011 by Marki (Talk | contribs) (→‎Announcements)

Jump to: navigation, search

GlueX Offline Software Meeting
Wednesday, February 23, 2011
1:30 pm EST
JLab: CEBAF Center F326/7

Agenda

  1. Announcements
    1. New sim-recon release: sim-recon-2011-02-02: Mark
    2. Computing Model Spreadsheet: Mark
  2. Review of minutes from the last meeting: all
  3. Configuring JANA: David
  4. Calibration Database Update: Dmitry
  5. Action Item Review: all
    1. Resolved issues
    2. Outstanding issues
    • To view these links, login first. Anonymous login is available.
  6. Review of recent repository activity: all

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/2011-1Q on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2011-1Q/ . You have to be a member of the "halld" Unix group to do this.

Minutes

Present:

  • IU: Jake Bennett, Matt Shepherd, Kei Moriya
  • JLab: Vardan Gyurjyan, Mark Ito (chair), David Lawrence, Dmitry Romanov, Elton Smith, Sascha Somov, Simon Taylor, Elliott Wolin, Beni Zihlmann

Announcements

  1. Mark reminded us of the lastest tagged release of the simulation/reconstruction software: sim-recon-2011-02-02.
  2. Mark called attention to the Computing Model Spreadsheet that was circulated on the email list. Modifications continue based on feedback from the Collaboration.
  3. Elliott announced that Andrew Blackburn will start work again on the ded event display next week. The next goal: have a simple way to connect a running JANA process to the event display, with two-way communication, for example to try different algorithms tracking on a single selected event within an event stream.
    • There was a discussion of how we decide on event display technology and whether we had enough manpower to pursue more than one avenue and, related to that, why is the current viewer (hdview2) not good enough. Andrew has been using the bCNU framework developed by Dave Heddle of CNU. Dmitry has been planning to look at using the EVE package of ROOT, but has not had much time to look at it. hdview2 also uses a subset of ROOT. Dave told us that hdview2 was not designed as a platform for long-term development. Elliott told us that the effort from Andrew and Dave H. is, if not free, of very low cost to the Collaboration and the framework will in any case be used in Hall B. EVE can be easily tied to the HDDS geometry specification (a ROOT version of the HDDS geometry already "exists") and would have built-in 3D capabilities as well as 2D projections. Elton in particular questioned whether we can sustain multiple efforts, the EVE route being the most speculative at this point. David thought that we should convene a meeting sooner than the next offline meeting to discuss the issues, especially since Andrew is slated to start next week. Clearly more discussion is needed; we did not come to any decisions.

Review of minutes from the last meeting

  • The new release of JANA, 0.6.3, has arrived. Note that the build steps have changed slightly from previous versions.
  • David is doing work to characterize the "split-off problem". He intends to feed back what he finds to the folks working on BCAL reconstruction, among others.
  • Beni reported that Richard Jones has checked in some changes to HDDM to eliminate compiler warnings when building with gcc 4.4.5.
  • There was a meeting last week to discuss the way timing is handled in the reconstruction. One take-away that Matt mentioned was the given the way times are generated in the Monte Carlo, where t=0 is defined as the time where the photon beam crosses the center of the target, using the raw times is equivalent to perfect resolution and a perfect identification of the beam RF bucket. We can therefore just go with the time offset in the raw times as if we are in the era of identifying the RF bucket since the RF-bucket timing should be very good compared to any measured time in the detector.
  • Kei will present an update on his PID studies at the next Physics Working Group meeting.

goal for event display: have a simple way to connect running jana process to event display, back and forth, different algorithms for example

event display, Elton, don't have manpower to work on more than one thing at a time what is david's situation? sasha, he will go on with hall b stuff he will maintain framework

student will leave someday

perhaps mephi phd student might be interested event display for selex experiment, eve, try to use root/display what is difficulty with jana

elton before we go down any of these paths we should have a plan limitation? Matt, Elliott not well integrated hdview2 problems? always expected that someone would come along and do a more sophisticated event display

ded is not 3d

discussion of event display

Retrieved from "https://halldweb.jlab.org/wiki/index.php?title=GlueX_Offline_Meeting,_February_23,_2011&oldid=25253"