Minutes of the Software Parallel Session of the 

            E614 Collaboration Meeting  10-11 December 1999


 Progress on MOFIA (Maher Quraan) :

       The geometry and data structures are stable.  The hit and track 
       structures are still undergoing changes.  It may take about 
       six months to get a version of MOFIA which will actually fit a
       track from TDC data.

 Pattern recognition (Jim Musser) :

       Pattern recognition code now reads ASCII data files (not the 
       encoded simulated TDC data) generated by the Monte Carlo code
       and organizes the hits according to various time windows.  This
       is a pre-curser to selecting tracks for fitting.  Jim is now
       ready to interact with the people developing the first guess 
       helix tracks. 

 Digitization in Monte Carlo (So Takei, Dennis Wright) :

       The current method of track digitization uses the entry and
       exit points of a track to a cell to approximate the track in
       the cell.  The closest approach to the sense wire is taken as 
       the point which gives the leading edge TDC time.  The new 
       method, which will appear in E614 GEANT v1.3 stores track points
       within each cell at 180 um intervals and then looks up the 
       drift time from a matrix of isochrones generated in GARFIELD. 
       This method is much more general and allows for more drift 
       chamber physics to be added to the digitization.

 Energy loss models in GEANT (Maxim Vasiliev) :

       It appears that the photoabsorption-ionization model is a much
       more accurate means of doing energy loss in thin layers in GEANT.
       The model is already available in GEANT through the STRA flag.
       Two questions will be investigated: 1) what does the increased 
       accuracy cost in CPU speed?  2) can we go back and forth between 
       different energy loss models as we go from thin layers to thick 
       layers?

 GEANT history file/bank (Renee Poutissou) :

       A list of parameters was proposed to fill the GEANT Monte Carlo/
       history file bank.  The muon decay vertex and all dynamical 
       variables associated with it (time, momentum, particle type, etc.) 
       will be included, as well as the initial vertices for all beam 
       particles.  Event number, random number, all data from the FFCARDS
       and the GEANT version number will also be included.

 Implementation of analysis code (Art Olin) :
 
       It has taken about six months to iron out the problems of 
       converting to F90.  The ABSOFT F90 debugger arrived without 
       documentation but this information has now been retrieved and 
       resides on the web page.  There are a number of useful F90 tools
       now available to programmers.
  
       Now is the time to look critically at code understandability and
       make full use of modules in F90.    

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