NUCLEON PROJECT Simulation and Reconstruction Software

215,761pages on
this wiki
Add New Page
Discuss this page0 Share

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.

NUCLEON PROJECT Simulation and Reconstruction Software at Wikia

Welcome to the NUCLEON PROJECT Simulation and Reconstruction Software mini wiki at Scratchpad!

You can use the box below to create new pages for this mini-wiki. Make sure you type [[Category:NUCLEON PROJECT Simulation and Reconstruction Software]] on the page before you save it to make it part of the NUCLEON PROJECT Simulation and Reconstruction Software wiki (preload can be enabled to automate this task, by clicking this link and saving that page. Afterwards, you may need to purge this page, if you still see this message).

This is a web page of the NUCLEON PROJECT Simulation and Reconstruction Software. The software is a private property of the NUCLEON Collaboration.


This is a package of C++ libraries which simulates nuclei interactions in the NUCLEON detector and transport the tracks trough the detector material. The package is based on ROOT VMC [1] which provides the interfaces to well known transportation engines: Geant3 [2] and Geant4 [3]. The interface to FLUKA [4] is under development. The advantage of using VMC interface is that one defines the detector geometry and properties via ROOT [5] TGeo classes and the concrete transport engine is defined at the run-time of your application. Therefore one can test different transport engines within exactly the same user code.


The current version is 1.2. The source code can be downloaded using this [http:// link]



  • Compiler: g++

Compilation the NUCLON-VMC

The compilation is done almost automatically, what you need is to set up correctly the variables: Please edit file

Rules (main NUCLEON-VMC directory) 

and set up


variables. For example:

G3VMCINSTALL := /cern/geant3_vmc/ 
G4VMCINSTALL := /cern/geant4_vmc
G4INSTALL    := /cern/geant4
VGMINSTALL   := /cern/vgm
ROOTINSTALL  := /cern/root
PYTHIAINSTALL:= /cern/pythia6

from the main NUCLEON VMC directory type:


Normally it should build the package.


  • Set the environment variable LD_LIBRARY_PATH to search for shared libraries from root session
    • Please set the following environment variables:
Geant4 variables
ROOTSYS         (path to root installation directory)
VMC             (path to geant4_vmc installation directory)
VGM_INSTALL     (path to VGM installation directory)
G3INSTALL       (path to geant3_vmc installation directory)
CLHEP_BASE_DIR  (path to CLHEP installation directory)
USE_VGM         (set this variable to 1)
LD_LIBRARY_PATH (set this variable to  

An example of variables setting in csh:

source /cern/geant4/env.csh 
setenv ROOTSYS     /cern/root
setenv VMC         /cern/geant4_vmc/
setenv VGM_INSTALL /cern/vgm/
setenv G3INSTALL   /cern/geant3_vmc/
setenv USE_VGM 1
  • Edit macros/test1.C (set up the number of events to generate and generator to use
appl->SetGenerator(TString name)
  • run root:
root[].x run_g4.C


root[].x run_g3.C 

By default a file "nuclon.root" will be created. You could visualize the results of the simulation from a new root session:

root[].x test_viewer.C

An application will appear. Please click buttons and learn the output.


  • A manual with code overview and some results is under way. We are not ready yet to make it public
  • The code itself, classes, methods etc can be understood from the html documentation which can be created typing from the command line:
make doc

Please examine: doc/htmldoc/USER_INDEX.html


16/08/2006 NUCLEON-VMC version 1.2 is available.


FEDRA VMC is written by

  • Dmitry Naumov (JINR, Dubna, Russia and INFN Firenze, Italy).
  • Artur Tkachenko (JINR, Dubna, Russia).

Please send your comments, suggestions to

Dmitry Naumov (
Artur Tkachenko (

NUCLEON VMC Presentations

DmitryNaumov 16 August 2006 (CEST) 

Also on Fandom

Random wikia