Starsim is the centerpiece of the STAR simulation software.

Starsim contains all of the functionality of PAW and as such interprets all the standard KUIP commands. Starsim also contains a heavily instrumented GEANT 3.21 library, allowing for a rich functionality to be quickly implemented in a simulation app.


How to log in to stasim interface?

On rcf type                             ->   starsim -w 1
                                                              

To turn the debug mode on    ->   debug on

Load the geometry and other settings  ->    detp geometry [some settings]    e.g. detp geometry y2012
                                                                 gexec $STAR_LIB/geometry.so  
                                                                 gclose all


Now you can do PYTHIA  or GSTAR simulation work on starsim interface.



Running PYTHIA on starsim interface


Run                         ->         stardev

Load Pythia Library ->          gexec $STAR_LIB/[PYTHIA]            ; [PYTHIA]  -> PYTHIA library you want to load  e.g. libPythia6_4_22
                                             gexec $STAR_LIB /bpythia.so 

Now you can run a kumac script to generate events or type commands on starsim specifying your needs to generate events.
Refer to this page to learn how to run write a kumac code:

http://drupal.star.bnl.gov/STAR/blog/devika/2013/jun/07/pythia-general-interpretation-a-kumac-code

 

Runing kumac code on starsim: (if you have all the commands to log in to starsim in the kumac code itself)

>> stardev
 >> starsim -w 0 -b filename.kumac "input values"




Running GSTAR on starsim

Once you load the geometry to starsim,

• show subsystems by typing
  display detm
   
• draw some detector subsystem
  draw TPCE
  or optionally define cuts
  dcut TPCE z 1 10 10
  (order: [volume] [axis] [cut] [horiz origin] [vert origin] [horiz scale] [vert scale]) the example above will give a view of the TPC along the z axis, with a cut at z=0, and put the origin at coordinate (10, 10) of the window.
  to draw everything:
  /geant/drawing/draw cave 70 30 30 10 10 0.02 0.02
  (order: [volume] [theta] [phi] [psi] [horiz origin] [vert origin] [horiz scale] [vert scale])
• generate some particle tracks, type
  gkine 2 8 0.1 1 -1 1
  (the order is [# tracks] [particle type] [low pT] [hi pT] [lo rapidity] [hi rapidity])
  trigger event,
  trig
  finally, detect hits,
  dhits