Version: Geant4 8.2 December 2006

User's Documents
Overview

## Welcome

Welcome to the Geant4 User's Documents page. This page gives you an overview of all available documents which are created and maintained by the Geant4 international collaboration.

GEANT4 is a toolkit for both full and fast Monte Carlo simulation of detectors in High Energy Physics. It is also designed to take into account the requirements of space and cosmic ray applications, nuclear, heavy ion and radiation computations, and medical applications.

The following document gives you a more complete introduction to Geant4.

- Introduction to Geant4
  (Printed Version: ps, ps.gz, pdf)

For information on changes in the User's Documents since the last release, please see the following note.

- Changes in User's Documents since the last release

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## User's Guides

The following four documents comprise a complete set of user's manuals for the Geant4 toolkit. They contain the information necessary to build a simulation at the novice or advanced level, and to make improvements in the toolkit itself.

- Installation Guide: For setting up Geant4 in your computing environment
  We strongly recommend installing the Geant4 toolkit under your computing environment before starting to read the following user's guides. You will gain much more from the user guides if you can check things out with a working version while you are reading them. This installation guide instructs you in the setting up of the Geant4 toolkit on your computer.
  (Printed Version: ps, ps.gz, pdf)
  (Version 7.1: html, ps, ps.gz pdf)
  (Version 7.0: html, ps, ps.gz, pdf)
- User's Guide: For Application Developers
  If you are new to Geant4, we recommend that you read this document first. The second chapter was written for novice users. It provides a step-by-step tutorial in the use of Geant4. Subsequent chapters cover the toolkit in more detail, describing how to build practical applications. Many example codes are provided, which cover most applications and/or experiments. Also included are sections for those who wish to make use of the more advanced features of the toolkit.
  (Printed Version: ps, ps.gz, pdf)
  (Version 7.1: html, ps, ps.gz, pdf)
  (Version 7.0: html, ps, ps.gz, pdf)
- User's Guide: For Toolkit Developers
  This document is for those who wish to extend the functionality of the Geant4 toolkit. This might include adding a new physics process, adding a new particle, and so on. It starts with an explanation of the object-oriented analysis and design performed by the original toolkit developers. Understanding this design is mandatory for a new toolkit developer. Then, guidance on how to extend the functionality of each class category is given.
  (Printed Version: ps, ps.gz, pdf)
  (Version 8.0: html, ps, ps.gz, pdf)
  (Version 7.1: html, ps, ps.gz, pdf)

- Physics Reference Manual
  This is a detailed description of the physics interactions provided in the Geant4 toolkit. The theory, model or parameterization of each interaction is discussed. There are a few gaps in the Physics Reference Manual which correspond to un-implemented interactions. There are also a few sections with little documentation. Improvements in these sections are expected.
  (Printed Version: ps, ps.gz, pdf)
  (Version 7.1: html, ps, ps.gz, pdf)
  (Version 7.0: html, ps, ps.gz, pdf)
- Software Reference Manual
  This is a detailed description of the definitions of classes and their public methods in the toolkit. Text is auto-generated for each selected class so there is currently no comprehensive printable version of all classes.
  (Version 7.1: html)
  (Version 7.0: html)

## Contributions from Users

To make Geant4 a more powerful and reliable detector simulation toolkit, all levels of contributions from you are essential.

- Bug Reports and Fixes
  Bugs reported and problem tracking system.

- FAQ
  Frequently asked questions from users and answers to them.

- User Support Policy FAQ
  Frequently asked questions from users about support from and interaction with the Geant4 collaboration.

About the authors