Gen Software/Simulation Meeting.

Wednesday, Feb. 11; 10:00am - 11:00am

attendees: R.Feuerbach,O.Gayou,O.Hansen,B.Reitz,A.Semenov,B.Wojtsekhowski

0.) introduction

BR:  goal if this subgroup of the Hall A Gen collaboration 
     is to develop software tools to
     - simulate the experiment (subsystems as well as the whole)
     - analyze the experiment
     one main idea is to use the Hall A C++/root analyzer, for 
     both: analyzing the results from simulations and from real data.

1.) status of simulations

BR:  got Geant 3 based MC for the BigBite from Eugene Chudakov,
     which includes: Shower/Preshower/Scintillators, DC, BigBite Magnet,
     and Target Cell. 
     plans to test and get familiar with this package

AS:  shows the MCeep based "physics event generator"
     a sample hbook file has been generated
     points out, that the mean value of the electron momenta 
     is usually below the central value given in the proposal,
     whereas the mean value of the neutron momenta is the same 
     or slightly higher.

     shows the status of the MC simulation for the GEn neutron 
     detector setup. Neutron bar geometry is implemented as in 
     D.Waldman's drawings. For final version, the drawings for 
     the veto detector setup are needed (expected to be 
     available in two weeks). BW provided some informations
     for the veto for now.

discussion of next tasks:

     - defining interface/output of the monte carlos
       (between BR and AS)
     - new "decoder" for the root analyzer is needed, to 
       read in the output of the simulations.
       (BR, RF, and OG are interested and will look into it)
     - OH points out the importance of a careful digitization
       of the simulated data

2.)  Analysis Software

BR:  reports, that a DAQ system for testing the drift chambers
     is about to be set-up at UVA.
     His highest priority is now, to set-up the software for it 
     as well. He will take care of (with the help of OH): Coda-Readoutlist, 
     Decoder in the Root-Analyzer, modifying the existing wire chamber classes
     to get and display the raw single wire data (drift-times, 
     number of hits ...)
     N.Liyanage et al. will then use it for cosmic tests. N.Liyanage
     et al. will also work on the tracking code for these chambers

OG:  will look into the preshower/shower class for the Gen-BigBite 
     detector set-up
     SRC has already a neutron detector class. The Gen collaboration
     needs someone to look into this class and adapt it for 
     the Gen setup. (should start soon, to synchronize with AS
     progress on the neutron detector simulation)

3) Closing

- we will continue to have biweekly meetings, but we want to 
  move the time, so that N.Liyanage can join, it was proposed 
  to change it to Thursday afternoon.