The FLUKA manual

This report describes the 2025 version of the FLUKA particle transport code. The first part introduces the basic notions, describes the modular structure of the system, and contains an installation and beginner’s guide. The second part complements this initial information with details about the various components of FLUKA and how to use them. It concludes with a detailed history and bibliography.

Front matter

• Preface
• Acknowledgements
• License

A summary description of FLUKA

• Introduction
  • What is FLUKA?
  • A quick look at FLUKA’s physics, structure and capabilities
• A FLUKA beginner’s guide
  • Introduction
  • Installing FLUKA
  • Building a FLUKA input
  • Running FLUKA
  • Accessing results
  • Various settings
  • Biasing
  • Flair
• Installation
  • Requirements
  • Installation instructions
  • Package content
  • Pre-connected I/O files
• FLUKA modules (Fortran files)

User guide

• Particle and material codes
  • Particles transported by FLUKA
• Pre-defined materials
• Physical units
• General features of FLUKA input
  • The input preprocessor
• Description of FLUKA input options
  • Introduction to the FLUKA input options
• Combinatorial Geometry
  • Introduction
  • Combinatorial Geometry input
  • Voxel geometry
  • The Flair Geometry Editor
• Output
  • Main output
  • Scratch file
  • Random number seeds
  • Error messages
  • Estimator output
  • USERDUMP output
  • RAY output
  • User-generated output
• Low-energy neutrons in FLUKA
  • Multigroup neutron transport
  • Partial pointwise transport with groupwise cross sections
  • Secondary particle production
• The FLUKA neutron cross section library
  • 260 neutron, 42 gamma group library
• Full pointwise transport
  • Resonances and self-shielding with pointwise cross sections
  • Secondary particle emission with pointwise cross sections
  • Photon emission with pointwise cross sections
  • Fission with pointwise cross sections
  • List of isotopes for which pointwise cross sections are available
• Collision tape
  • What is a collision tape and what is its purpose
  • How to write a collision tape
• Generating and propagating optical photons
  • Cherenkov transport and quantum efficiency
  • Handling optical photons
• User routines
  • How to write, compile and link a user routine
  • Description of available user routines
• Use of RAY pseudo-particles
• Special source: colliding beams
• Special source: cosmic rays
  • Primary spectrum
  • Scoring
  • The various SDUM options available with command SPECSOUR
  • Example of input data cards
• Special source: synchrotron radiation
  • Second continuation card (optional)

History and references

• History of FLUKA
• References

Indices

• Index

• Search Page