Ecole Geant4 de l’IN2P3 et PHENIICS

16 - 20 May 2022, IJCLab


The 2022 tutorial is supported and organised by the Doctoral School PHENIICS, see also the university tutorial Web sites:


Building 203 (“Salle d’enseignement”), IJCLab, Orsay
GPS: 48.699762173340204, 2.171272884212302


9:00 - 12:30 and 14:00 - 18:00 (16:00 on Friday)

Note that the meeting place, usually known as “Salle d’enseignement” is not situated in the main building of the former LAL (b. 200), but in another (small) building (behind the b. 206, see the map).

On Monday morning, we will also pick up participants in front of building 200 ~5 min before the start of the tutorial.


  • Ivana Hrivnacova (IJCLab Orsay, Universite de Paris-Sud, IN2P3-CNRS) (responsible),
  • Igor Semeniouk (LLR, Ecole Polytechnique),
  • Marc Verderi (LLR, Ecole Polytechnique)


Group photo

Registration – CLOSED

The registration for the PHENIICS participants is organised by the doctoral school.

Due to the health covid-19 crisis the number of participants was reduced and we cannot accept external participants.

Geant4 Installation

The hands on will be done on the classroom computers (MAC OSX) with the Geant4 software already installed. If participants want to work with their laptops, it is necessary to install Geant4 before start of the course. No support for installation will be provided during the course. Also no support will be provided for Windows OS.

More detailed instructions about the necessary Geant4 configuration are available here.


The tutorial will alternate lectures with exercises for development of a user application. The goal is to learn step by step using the Geant4 toolkit and developing of a Geant4 application. The following topics will be covered:

  • Definition of geometry and materials
  • Definition the primary particles sources
  • Definition of physical processes and selection of a physics list
  • User interfaces, macros, visualization
  • Accounting physical quantities (« scoring »), analysis
  • Multithreading
  • Biasing

Required skills

Basic level of C++ programming language is required :

  • basic/syntax: if statements, loop constructs functions, pointers, references, passing function arguments
  • classes: class definition and implementation, class data members and member functions/methods, static data members, member functions/methods, base class and derived class, pure virtual function/method
  • standard template library: iostream, vector

For those who need a revision, besides the books on C++, you can also revise your knowledge e.g. on this site: and follow: 5. C++ OOP Examples 6. C++ OOP Inheritance & Polymorphism where the most important concepts used in Geant4 are presented.