GlueX Software Meeting Minutes
Jan. 4, 2005

Attending: David L. Elliott W. Simon T. Zisis P.

Agenda:

1. HDFast momentum resolutions update  (Simon T.)
2. cMsg IPC (Elliott W.)
3. DMagneticFieldStepper (David L.)
4. Updates from all tasks on the task list (All)

1.
Simon updated us on his work behind the document he recently
uploaded to the DocDB. There still are porblems with HDFast
where the momentum resolutions don't make sense when both
multiple scattering and detector position resolution are 
"turned on" compared to what one would expect from when each
was turned on individually. Simon has been in communication
with the authors of MCFast and will continue to pursue that.
Ed and his student had done a related investigation but saw
a dependance on resolution on how many particles are thrown
per event. Simon has done tests throwing 9 particles per event.
He will try repeating his measurement with 1 particle per event
to see if he can confirm this effect.

2. The JLab DAQ group has produced a new software package called
cMsg which implements publish-subscribe network communication
between processes. He invited everyone to think of applications
where this might be useful so it could be tested.

3.
Dave described the new DMagneticFieldStepper class which uses
the DMagneticFieldMap class to step through an inhomogeneous
magnetic field. Richard pointed out that the current implementation
of DMagneticFieldMap reflects elements of the uderlying source
(dsolenoid.table). He suggested we work to make the class
completely abstract.

4.
We reviewed 
Maurizo Barbi for BCAL reconstruction

GRID tools: Zisis P.