Last version:
FLUKA 2025.1.1, June 17th 2025
(last respin 2025.1.1)
flair-2.3-0f 05-May-2025

News:

-- Fluka Release
( 17.06.2025 )
FLUKA 2025.1.1 has been released.
New FLUKA reference, please read and cite it:
F. Ballarini et al., The FLUKA code: Overview and new developments, EPJ Nuclear Sci. Technol. 10, 16 (2024) https://doi.org/10.1051/epjn/2024015


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INTRO
    FLUKA User license, as established by the FLUKA Coordination Committee
        FLUKA User license
        COPYRIGHT NOTICE AND LICENSE CONDITIONS
        DEFINITIONS
        LICENSE GRANT
        GRANT BACK
        PUBLICATIONS AND ACKNOWLEDGEMENT
        WARRANTY AND LIABILITY
        TERMINATION
        FLUKA set of references, subject to change
Index of the FLUKA manual on-line
0} What is FLUKA?
1} A quick look at FLUKA's physics, structure and capabilities
    1.1} Physics
        1.1.1} Hadron inelastic nuclear interactions
        1.1.2} Elastic Scattering
        1.1.3} Nucleus-Nucleus interactions
        1.1.4} Transport of charged hadrons and muons
        1.1.5} Energy loss
        1.1.6} Low-energy neutrons
        1.1.7} Electrons
        1.1.8} Photons
        1.1.9} Optical photons
        1.1.10} Neutrinos
    1.2} Geometry
    1.3} Transport
    1.4} Biasing
    1.5} Optimisation
    1.6} Scoring
    1.7} Code structure, technical aspects
    1.8} MAIN DIFFERENCES BETWEEN FLUKA AND EARLIER CODES WITH SAME NAME
    1.9} Applications
2} A FLUKA beginner's guide
    2.1} Installing FLUKA
    2.2} Building a FLUKA input
        2.2.1} Generalities about FLUKA input
        2.2.2} Input alignment
        2.2.3} A simple example
        2.2.4} The title
        2.2.5} Definition of the primary particles
        2.2.6} The geometry
        2.2.7} Materials
        2.2.8} Assigning materials to regions
        2.2.9} Production thresholds
        2.2.10} Estimators and Detectors
        2.2.11} Initialisation of the random number sequence
        2.2.12} Starting signal and number of requested histories
        2.2.13} The sample input file
        2.2.14} Running FLUKA
        2.2.15} Accessing results
            Boundary crossing estimator
            Track length estimator
            Binning estimator
        2.2.16} Readout of other FLUKA estimators
        2.2.17} Various settings
        2.2.18} Biasing
3} Installation
            Pre-connected I/O files
4} FLUKA modules (Fortran files)
5} Particle and material codes
    5.1} Particles codes
    5.2} Pre-defined materials
            List of pre-defined single-element FLUKA materials
            List of pre-defined ICRU compounds
6} General features of FLUKA input
            Physical units
    6.1} The input preprocessor
            Syntax
            Definition of Constants
            Conditional directives
            Include directive
7} Description of FLUKA input options
    Introduction to the FLUKA input options
    7.1} Basic commands
    7.2} Definition of the radiation source
    7.3} Description of the geometry
    7.4} Materials
    7.5} Setting options
    7.6} Format setting
    7.7} General setting options
    7.8} Multiple Coulomb scattering
    7.9} Step length
    7.10} Energy cutoffs
    7.11} Time cutoffs
    7.12} Ionisation energy loss
    7.13} Special radiation components or effects
        7.13.1} Radiation components
        7.13.2} Physics effects
    7.14} Scoring options
    7.15} Event by event scoring options
    7.16} Scoring modifying options
    7.17} Options to handle radioactive decay
    7.18} Biasing options
        7.18.1} Simple biasing options
        7.18.2} Weight window options
        7.18.3} Biasing options for low-energy neutrons
    7.19} Calls to user routines
    7.20} Miscellaneous
ASSIGNMAt
AUXSCORE
BEAM
BEAMAXES
BEAMPOSit
BIASING
            WARNING:
COMPOUND
CORRFACT
DCYSCORE
DCYTIMES
DEFAULTS
            Defaults changed by the various options:
DELTARAY
DETECT
DISCARD
ELCFIELD
EMF
EMF-BIAS
EMFCUT
EMFFIX
EMFFLUO
EMFRAY
EVENTBIN
EVENTDAT
EXPTRANS
FIXED
FLUKAFIX
FREE
GCR-SPE
GEOBEGIN
GEOEND
GLOBAL
HI-PROPErt
IONFLUCT
IONTRANS
IRRPROFIle
LAM-BIAS
LOW-BIAS
LOW-DOWN
LOW-MAT
LOW-NEUT
MATERIAL
MAT-PROP
MCSTHRESh
MGNFIELD
MULSOPT
MUPHOTON
OPEN
OPT-PROD
OPT-PROP
PAIRBREM
PART-THRes
PHOTONUC
PHYSICS
PLOTGEOM
POLARIZAti
RADDECAY
RANDOMIZe
RESNUCLEi
ROT-DEFIni
ROTPRBIN
SCORE
SOURCE
SPECSOUR
START
STEPSIZE
STERNHEIme
STOP
TCQUENCH
THRESHOLd
TIME-CUT
TITLE
USERDUMP
            If SDUM is different from UDQUENCH:
            If SDUM = UDQUENCH:
USERWEIG
USRBDX
            IMPORTANT!
USRBIN
USRCOLL
            IMPORTANT!
USRGCALL
USRICALL
USROCALL
USRTRACK
            IMPORTANT!
USRYIELD
WW-FACTOr
WW-PROFIle
WW-THRESh
8} Combinatorial Geometry
            Combinatorial Geometry input
    8.1} GEOBEGIN card
    8.2} Geometry Title card
    8.3} Body data
            FIXED FORMAT BODY INPUT
            FREE FORMAT BODY INPUT
            Body types
            NOTE
    8.4} Geometry directives
        8.4.1} Expansion
        8.4.2} Translation
        8.4.3} Roto-translation transformation
        8.4.4} Geometry directives: usage notes
    8.5} Body END card
    8.6} Region data
            FIXED FORMAT REGION INPUT
            FREE FORMAT REGION INPUT
            Region Volumes
    8.7} LATTICE card
    8.8} GEOEND card
            Geometry debugger
    8.9} Voxel Geometry
9} Output
    9.1} Main output
    9.2} Scratch file
    9.3} Random number seeds
    9.4} Error messages
    9.5} Estimator output
        9.5.1} DETECT output
        9.5.2} EVENTBIN output
        9.5.3} EVENTDAT output
        9.5.4} RESNUCLE output
        9.5.5} USRBDX output
        9.5.6} USRBIN output
        9.5.7} USRCOLL output
        9.5.8} USRTRACK output
        9.5.9} USRYIELD output
    9.6} USERDUMP output
    9.7} RAY output
    9.8} User-generated output
10} Low-energy neutrons in FLUKA
    10.1} Multigroup neutron transport
        10.1.1} Possible artefacts
    10.2} Pointwise transport
    10.3} Secondary particle production
        10.3.1} Gamma generation
        10.3.2} Secondary neutrons
        10.3.3} Generation of charged particles
        10.3.4} Residual nuclei
    10.4} The FLUKA neutron cross section library
        10.4.1} 260 neutron, 42 gamma group library
            10.4.1.1} Energy group structure of the 260-neutron, 42-gamma groups data set:
11} Collision tape
    11.1} How to write a collision tape
12} Generating and propagating optical photons
    12.1} Cherenkov transport and quantum efficiency
    12.2} Handling optical photons
        12.2.1} Example of SOURCE routine for optical photons
        12.2.2} Routine assigning a continuous Refraction Index as a function of
        12.2.3} Input Example no. 1: Only Cherenkov light is generated
        12.2.4} Input Example no. 2: Only Scintillation light is concerned
        12.2.5} User output for optical photons from USERDUMP
        12.2.6} Readout of the sample user output
13} User routines
    13.1} INCLUDE files
    13.2} User routines
        13.2.1} abscff.f: user defined ABSorption CoeFFicient
        13.2.2} comscw.f: weighting deposited energy, stars or residual nuclei
        13.2.3} dffcff.f: user defined DiFFusion CoeFFicient
        13.2.4} endscp.f: ENergy density DiStributed - Change of Positions
        13.2.5} fldscp.f: FLuence DiStributed - Change of Positions
        13.2.6} fluscw.f: weighting fluence, current and yield
        13.2.7} formfu.f nuclear form factor
        13.2.8} frghns.f material roughness (for optical photons)
        13.2.10} lattic.f (symmetry transformation for lattice geometry)
        13.2.11} magfld.f definition of a magnetic field
        13.2.12} mdstck.f management of the stack of secondaries
        13.2.13} mgdraw.f general event interface
        13.2.14} ophbdx.f user defined Optical PHoton BounDary-(X)crossing properties
        13.2.15} queffc.f: user defined QUantum EFFiCiency
        13.2.16} rflctv.f: user defined ReFLeCTiVity
        13.2.17} rfrndx.f: user defined ReFRaction iNDeX
        13.2.18} soevsv.f SOurce EVent SaVing
        13.2.19} source.f user-written source
            IMPORTANT!
        13.2.21} ubsset.f User BiaSing SETting
        13.2.22} udcdrl.f User defined DeCay DiRection biasing and Lambda
            (for neutrinos only)
        13.2.23} usimbs.f User defined IMportance BiaSing
        13.2.24} usrein.f USeR Event INitialisation
        13.2.25} usreou.f USeR Event OUtput (called at the end of each event)
        13.2.26} usrglo.f USeR GLObal settings
        13.2.27} usrini.f USeR INItialisation
        13.2.28} usrmed.f USeR MEDium dependent directives
        13.2.29} usrout.f USeR OUTput
        13.2.30} usrrnc.f USeR Residual NuClei
14} Use of RAY pseudoparticles
15} Special source: colliding beams
16} Special source: cosmic rays
    16.1} Primary spectrum
        16.1.1} The All-Particle Spectrum
        16.1.2} The High Energy All-Nucleon Spectrum
    16.2} Solar modulation
    16.3} Atmospheric model: geometry
        16.3.1} Earth atmosphere model
        16.3.2} Local atmosphere model
    16.4} Atmospheric model: density
    16.5} Geomagnetic field
    16.6} Scoring
    16.7} The various SDUM options available with command SPECSOUR
    16.8} Example of input data cards
17} History of FLUKA
    17.1} First generation (the CERN SPS Project, 1962-1978)
    17.2} Second generation (development of new hadron generators, 1978-1989)
    17.3} Third generation (the modern multiparticle/multipurpose code, 1988 to present)
    17.4} Code structure
    17.5} Geometry
    17.6} Particle transport
    17.7} Particle decays
    17.8} Magnetic fields
    17.9} Multiple Coulomb scattering
    17.10} Ionisation losses
    17.11} Time dependence
    17.12} Nuclear data and cross sections
    17.13} Electron and photon transport (EMF)
    17.14} Low-energy neutrons
    17.15} Hadron event generators
        17.15.1} High energy model improvements
        17.15.2} Cascade-Preequilibrium model (PEANUT)
        17.15.3} Evaporation/Fission and Fermi Break-Up
    17.16} Radioactivity evolution and radioactive decays
    17.17} Biasing
    17.18} Scoring
    17.19} Heavy ions
    17.20} DPMJET interface
    17.21} RQMD interfaces
    17.22} Neutrino interactions
    17.23} Code size
18} References
A1} Important warnings for the users

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