[Halld-offline] Minutes, GlueX Offline Software Meeting, March 21, 2012

[Mark M. Ito]

Folks,

Find the minutes below and at 
https://halldweb1.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_March_21,_2012#Minutes

-- Mark
_____

GlueX Offline Meeting, March 21, 2012
Minutes

Present:
* CMU: Will Levine, Paul Mattione, Curtis Meyer
* FSU: Nathan Sparks
* IU: Ryan Mitchell, Matt Shepherd
* JLab: Mark Ito (chair), David Lawrence, Simon Taylor, Elliott
Wolin, Beni Zihlmann
* UConn: Richard Jones

Announcements

* Mark announced that sim-recon-2012-03-12 has been released. See the
[30]sim-recon release page for details.
* Beni announced that he, in consultation with Richard, implemented a
change to allow secondary vertices to be stored in the HDGeant
output. The resulting particles will not appear in the list of
generated particles.

Review of Minutes from Last Meeting

We reviewed the [31]minutes from the March 7th meeting.
* Paul has checked in the two changes to the FCAL cluster finding
that Will discussed last time:
1. allow a charged track to veto more that one cluster
2. increase the charged-track-cluster match radius
* Paul's restructured classes are part of the sim-recon-2012-03-12
release.

Reconstruction Sub-Group Reports

Calorimeters

Will reported on further work on FCAL photon reconstruction. See
[32]his wiki page for plots and details (new results start in the
"energy resolution" section.
* He has measured energy resolution and offsets from generated values
as a function of photon energy for all "unconverted" photons (those
that enter the FCAL as a photon) and for the entire population.
* He looked at the effect on reconstruction efficiency when
single-block clusters are allowed. Efficiency below 400 MeV
improves significantly.
+ We encouraged him to make the change to allow these clusters.
Users can always cut them later if the sample is too
contaminated for their purposes.
* Paul proposed that timing cuts Will discussed last time be included
in the standard b1pi analysis that is run twice a week.
* Not all issues have been resolved. Will will continue his work.

Tracking

Simon has started at kinematic fitting code, in particular addressing
errors reported by tracking. He uses pπ^+π^- events where the pions
come from a ρ. The pulls for p[x], p[y], and p[z] for the pions are too
large by 20 to 25%, for the proton, too large by about 10%. Also the
efficiency for getting a successful fit is poor.

He has started looking at how use of the material map is implemented.
The map comes in through the calibration system and there is averaging
done in spatial bins to improve performance. Simon will do a comparison
with finer bins to see if there is any improvement.

PID

Paul has gone back to working on tracking, picking up the spiraling
pion problem again. He has it so it will link hits together on spirals,
though there is still some work left to do. He still gets many
possibilities for track candidates.

Kinematic Fitting Documentation

Will re-discovered the [33]wiki page on kinematic fitting and is
updating the information and working on new, functional examples.

Offline Software Review Planning

David reminded us of the [34]wiki page where he has gathered material
relevant to the review.

Areas of current work:
* refinement of the schedule
* a one-pager on a software management plan
* a list of "tight spots and weaknesses"
* a research management plan
+ Hall A provided an example. Names are assigned to projects.

So far, estimates of manpower required seem to match expectations from
collaboration on the FTE's available.

Elliott asked if the algorithm for the level 3 trigger on on list of
things to be reviewed. It is not at present.

The JANA/CLARA thing continues to be raised in the context of
cross-Hall cooperation. Different people have different ideas on how
this should go.

Retrieved from
"https://halldweb1.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_March_21,_2012"

References

30. https://halldweb1.jlab.org/wiki/index.php/Sim-Recon_Tagged_Releases
31. 
https://halldweb1.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_March_7,_2012#Minutes
32. 
https://halldweb1.jlab.org/wiki/index.php/FCAL_Reconstruction_in_b1pi_events_03/14/2012
33. https://halldweb1.jlab.org/wiki/index.php/Kinematic_Fitting
34. https://halldweb1.jlab.org/wiki/index.php/2012_Software_Review

-- 
Mark M. Ito
Jefferson Lab (www.jlab.org)
(757)269-5295