The main topic of the meeting was the development priorities
for the offline software - a list of priorities (in no particular
order) is shown below:
- restructure recsis packages so that the a1 and recsis shells
share the same defaults
This job is almost finished, there will be an renewed effort
to make the tcl defaults in recsis the best numbers known.
In addition, several variables (such as timing offsets and
tdc window cuts) now under tcl control will move
under map control in the coming weeks.
- tof calibration software
This topic was discussed in detail in the Tuesday time of flight
meeting. Automated procedures exist to obtain the gain and time
walks. An effort now needs to me made to develop a procedure to
obtain a final calibration.
- DC geometry and alignment
We are anxiously awaiting to new geometry constants to be
placed in the map. The drift chamber alignment procedure will
be discussed in detail at the Friday CALCOM meeting
- misc. improvements to the structure of the tracking code
These relatively minor changes include:
- put a post DAQ translation table in the DC1 bank routines
to correct for known cable swaps in the data
- Create a DC2 bank that contains wire ids and distances
to allow an easy entry point for the monte Carlo
- allow seb and hbid generate the TRKS bank instead of just
filling it, this will make the code a bit more modular and
understandable
- Monte Carlo
This was discussed at the Monte Carlo meeting earlier in the
week, topics of discussion included
- better control cards and configuration files for the monte Carlo
- production of a dc2 bank
- the creation of a pre-processor in the monte Carlo
to speed processing time as well as a post-processor to knock
out dead wires and PMTs as well as account for the effect of the
trigger.
Most of the jobs we have to do are relatively small (less than one week)
and
self contained. Anybody interested in contributing to the software
effort
should contact myself or Dennis.
John McNabb discussed the results of his vertex reconstruction analysis,
in short John found that the vertex distribution as observed in target
empty data was considerable different for positive and negative tracks.
The vertex distribution also varies as a function of electron angle.
John was able to remove some of these effects by moving the chambers
by several centimeters or my rotating the chambers by 1 degree. It is
still unclear whether these effects are due to chamber alignment or
if there is some inconsistency in the tracking code - John is continuing
his investigations.
- Joe