sPHENIX discussion of software

[Gabor David <david AT bnl.gov>]

        I put the first shot on the fast hadron deposit simulator
on github in my directory vorosful/emcal

fasthadv4.C
fasthadv4.h

        The files are also available in

/direct/phenix+u/david/fasthadmc

        The plot c1.png shows how it works for 4, 8, 12 GeV hadrons
with the current values of parameters.  The total energy deposit
(and relative probabilities) are reasonably close to the full
simulations shown in

https://wiki.bnl.gov/sPHENIX/index.php/File:T-1044_SIM_DrawEMCalTower_LineShape_4.png
https://wiki.bnl.gov/sPHENIX/index.php/File:T-1044_SIM_DrawEMCalTower_LineShape_8.png
https://wiki.bnl.gov/sPHENIX/index.php/File:T-1044_SIM_DrawEMCalTower_LineShape_12.png

        I tried to provide plenty of inline comments and
explanations; it should be sufficient if you want to play with
the parameters yourself.

        While the code can use plenty more tuning, its advantage
is that the components are physics-motivated.  It generates the minimum 
ionizing, hadronic and electromagnetic part of a "generic" hadron in 3 
dimensions, and deposits  them into the "towers" of an (arbitrary) 
rectangular detector.  This can (and will) then serve as a starting
point for a clustering algorithm.

        For the moment I stopped tuning the parameters; once better
calibrated data from identified hadrons are available - both
total energy deposit AND individual showers to tune the shape!  -
I'll continue.

        Thanks,

        Gabor

--
Gabor David  (david AT bnl.gov)
Brookhaven National Laboratory
Physics Department, Bldg 510/c
UPTON NY 11973
Tel: (631)344-3016
FAX: (631)344-3253