In attendance:

David L., Elliott W. Simon T., Matt S., Richard J., Zisis P., Rafael H., Blake


Agenda:

1. BCAL simulations of beam test (Rafael)
  see his slides at:
  http://sisyphus.phys.uregina.ca/~rafael/BCal/MC/beamtest/19_06_2006

2. DANA->JANA (David)

3. AOT

====================================

The agenda was rearranged a bit to accomodate some technical difficulties.


DANA->JANA
-----------
David reported that the current version of DANA has been converted to
the first incarnation of JANA (the JLab analysis framework) and placed
in the new 12gev_phys subversion repository. The code compiles (using BMS
also copied to the 12gev repos.) but has not been tested. There was some
discussion of moving HDDS to the 12gev repository. It was decided that this
should be done only after coordinating with the CLAS12 group to make
sure it will be used and therefore worht our while.


Charged Particle Tracking
--------------------------
David brought up a suggestion Elton had recently made that in order for
the reconstruction software to have a meaninful impact on the hardware
design, it will need to achieve a fairly advanced state by sometime this
fall. Namely, we will need to be able to find tracks and fit them with
resolutions close to what we realistically expect from the real data.
Only then can we test things like the configuration of stereo and axial
layers in the CDC using the simulation, and before committing to the
full scale detector construction. Richard suggested that David will need 
to maintain pressure on the individuals responsible for the reconstruction
to achieve this by the fall. David agreed.


BCAL Beam Test Simulations
--------------------------
Find Rafael's slides at: http://www.jlab.org/~rafael/beamtest/

Rafael reported results of recent GEANT simulations he has done to
test the energy leakage of the bcal test module for the upcoming
beam test in Hall-B. The module defined in GEANT had the same rectangular
geometry as the physical ont that will be used for the test. Simulations
were done with 200MeV, 500MeV, and 650MeV photons incident at
90, 45, and 20 degrees. Energy leakage was simulated for beam spot sizes
expected on the module for using the 1.0mm, 2.0mm, and 2.6mm collimaters.

Some results:
- Energy leakage seems roughly independant of the beam spot size. This
was checked for both 200MeV and 650MeV photons.

- Energy sampling seems constant at about 12% for 650MeV, 500MeV, and
200MeV incident photons. This is consistent with previous simulations
of 1GeV photons.


Thus, the simulations indicated that the choice of collimater will have
a negligable impact on the energy leakage of the shower.

A second concern about how the spot size will affect the timing resolution
of the bcal module can not be addressed by these specific simulations
and is still under investigation.