Simulation



collision

The first stage in simulating the PHENIX detector is the program "PISA" which tracks particles produced by the event generators. The output from PISA is something called a "hits file" which is a collection of event-by-event data produced as the tracked particles pass through the sensitive parts of each detector subsystem. The following link is for Documentation for PHENIX Simulation Software at Vanderbilt.

For detail description of how to run PISA, please follow the link to PISA Primer manual.

Documentation for PISA Simulation

Other usefull links:
A Primer Mannual for the PHENIX Simulation Code PISA

PISA2000 Release Information

Documentation for PISA2000 Files MERGE function

Documentation for PISA Track Ancestry Function


Please use links below to know details about PHENIX simulation.

Events Generations:
There are almost an unlimited number of ways of generating events to track in PHENIX simulation software, PISA. Specifically there are 24 different event generator interfaces supported in PISA. Event generators may be thought of as being internally computed or externally computed via stand-alone programs. Examples of internal event generators are those for single particle tracking, dual particle tracking, or resonance decay tracking. There is even an internal "full event" generator called UA1 which mimics the pion spectra of real event generators. The full external event generators HIJET, HIJING, VENUS, RQMD, LUCIAE, VNI, PYTHIA and EXODUS have their interfaces available with PISA. In almost all simulation studies for nucleus-nucleus collision, HIJING has been used as the default full event generator in PHENIX whereas PHYTHIA is most commonly in use for proton-proton collisions. For single particle event generation EXODUS is most commonly used in PHENIX.

The Simulation group maintains the full event generator repository. With a CVS checkout as

cvs checkout event_gen

user will get the entire event generator source code package. The event generators can be compiled/linked on the different platforms, but this should generally not be necessary since the binaries can be executed over the AFS.

For more information go to:
Getting Started with PHENIX Reconstruction Software
Introduction to Simulation Events Generation
Selection of event generators in PISA
Event generator CVS package
Event Generator Software in PHENIX