Import Geant4 11.0.0 source tree
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Gabriele Cosmo
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//! \file "hadronic/FissionFragment/.README.txt"
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//!
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//! \brief Example FissionFragment README page
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/*! \page ExampleFissionFragment Example FissionFragment
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This example demonstrates an application of the fission fragment model in the
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NeutronHP model. This example is capable of using both models, but is designed
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around the Wendt Fission Model. A warning will be shown if the environment
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variable that enables the Wendt fission model is not set.
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\tableofcontents
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<HR>
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\section FissionFragment_s1 EXECUTION
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\subsection FissionFragment_sub1_s1 ENVIRONMENT
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- <CODE> G4NEUTRONHP_PRODUCE_FISSION_FRAGMENTS </CODE>
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- Required
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- The example requires this enviroment variable to be set. An error will be
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displayed and the example will terminate if this environment variable is
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not set.
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- <CODE> G4NEUTRON_HP_USE_WENDT_FISSION_MODEL </CODE>
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- Optional
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- This environment variable enables the Wendt fission model contained within
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the NeutronHP model for simulating fission events. The default model will
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be used otherwise. A warning will be displayed if this environment
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variable is not set.
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\subsection FissionFragment_sub2_s1 COMMAND LINE ARGUMENTS
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The example can be run without any input arguments. However, a few options
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are available:
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\verbatim
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-i ARG : run in batch mode from script file ARG
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-o ARG : write output to file ARG
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(defaults to FF_Neutron_HP.out)
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-n ARG : multithreading with ARG number of threads
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(only works if Geant4 was compiled with multithreading enabled)
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\endverbatim
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No output is currently generated, although the argument is provided. It is
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anticipated that future versions will provide some form of output
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summarizing the results of the simulation.
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\subsection FissionFragment_sub3_s1 INTERACTIVE
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No specialized UI commands are currently provided.
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To run the simulation, use the standard UI command:
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\verbatim
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/run/beamOn
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\endverbatim
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\section FissionFragment_s2 GEOMETRY
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The geometry is constructed in the FFDetectorConstruction class. The setup is
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based on a subcritical assembly design.
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\subsection FissionFragment_sub1_s2 MATERIALS
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This example requires a number of materials. They are loaded or constructed
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in the "DefineMaterials" function. A few of the materials are obtained from
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the NIST database. These materials are:
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- Air
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- Aluminum
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- Graphite
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- Polyethylene
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- Stainless steel
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- Water
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For more information, visit: <A HREF="http://bit.ly/1rEHjhW"> Geant4 User's
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Guide for Application Developers, Appendix: Geant4 Materials Database </A>
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Not all of the necessary materials were available from the NIST database,
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and were constructed manually from the estimated isotopics. These materials
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are:
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- 20% U235 enriched uranium
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- 93% B10 enriched BF3
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\subsection FissionFragment_sub2_s2 VOLUMES
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The world is composed of air instead of a vacuum to provide room return.
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The subcritical assembly is a water-filled aluminum tank.
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The fuel plates are composed of aluminum-clad uranium meat, and are
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completely submersed in the water of the subcritical assembly.
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An AmBe neutron source is placed in the exact center of the fuel plate
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loading configuration. The material is currently modeled as steel until
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more exact specifics of the AmBe isotopics can be obtained.
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The subcritical assembly rests on top of a graphite pile for moderation and
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shielding.
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\section FissionFragment_s3 PHYSICS LIST
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The particle's type and the physic processes which will be available
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in this example are set in the QGSP_BIC_HP physics list.
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\section FissionFragment_s4 PRIMARY GENERATOR
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The primary generator is defined in the FFPrimaryGeneratorAction class.
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The default particle is a 4.5 MeV neutron originating from the
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"NeutronSource" volume. The particles initial direction is isotropically
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sampled.
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\section FissionFragment_s5 DETECTOR RESPONSE
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The scoring method is yet to be implemented, although the BF3 detector is
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already included in the detector construction.
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\section FissionFragment_s6 VISUALISATION
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An example "vis.mac" will be included in a future release. For now, please
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refer to other examples for a few suggestions.
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<HR>
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\author B. Wendt (brycen.linn.wendt@cern.ch)
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\date June 26, 2014
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*/
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@@ -0,0 +1,114 @@
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=========================================================
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Geant4 - an Object-Oriented Toolkit for Simulation in HEP
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=========================================================
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-------------------------
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FissionFragment Example
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B.Wendt
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brycen.linn.wendt@cern.ch
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-------------------------
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This example demonstrates an application of the fission fragment model in the
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NeutronHP model. This example is capable of using both models, but is designed
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around the Wendt Fission Model. A warning will be shown if the environment
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variable that enables the Wendt fission model is not set.
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1 - EXECUTION
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A - Enable the following UI command :
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/process/had/particle_hp/use_Wendt_fission_model true
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to use the alternative Wendt fission model contained within the
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NeutronHP model for simulating fission events
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(else, the default fission model will be used).
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B - COMMAND LINE ARGUMENTS
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The example can be run without any input arguments. However, a few options
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are available:
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-i ARG : run in batch mode from script file ARG
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-o ARG : write output to file ARG
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(defaults to FF_Neutron_HP.out)
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-n ARG : multithreading with ARG number of threads
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(only works if Geant4 was compiled with multithreading
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enabled)
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No output is currently generated, although the argument is provided. It is
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anticipated that future versions will provide some form of output
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summarizing the results of the simulation.
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C - INTERACTIVE
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No specialized UI commands are currently provided.
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To run the simulation, use the standard UI command (after eventually
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the above UI command to use the alternative Wendt fission model):
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/run/beamOn
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2 - GEOMETRY
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The geometry is constructed in the FFDetectorConstruction class. The setup is
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based on a subcritical assembly design.
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A - MATERIALS
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This example requires a number of materials. They are loaded or constructed
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in the "DefineMaterials" function. A few of the materials are obtained from
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the NIST database (ref. Geant4 User's Guide for Application Developers,
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Appendix: Geant4 Materials Database). These materials are:
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- Air
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- Aluminum
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- Graphite
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- Polyethylene
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- Stainless steel
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- Water
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Not all of the necessary materials were available from the NIST database,
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and were constructed manually from the estimated isotopics. These materials
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are:
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- 20% U235 enriched uranium
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- 93% B10 enriched BF3
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B - Volumes
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The world is composed of air instead of a vacuum to provide room return.
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The subcritical assembly is a water-filled aluminum tank.
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The fuel plates are composed of aluminum-clad uranium meat, and are
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completely submersed in the water of the subcritical assembly.
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An AmBe neutron source is placed in the exact center of the fuel plate
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loading configuration. The material is currently modeled as steel until
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more exact specifics of the AmBe isotopics can be obtained.
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The subcritical assembly rests on top of a graphite pile for moderation and
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shielding.
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3 - PHYSICS LIST
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The particle's type and the physic processes which will be available
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in this example are set in the QGSP_BIC_HP physics list.
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4 - PRIMARY GENERATOR
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The primary generator is defined in the FFPrimaryGeneratorAction class.
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The default particle is a 4.5 MeV neutron originating from the
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"NeutronSource" volume. The particles initial direction is isotropically
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sampled.
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5 - DETECTOR RESPONSE
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The scoring method is yet to be implemented, although the BF3 detector is
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already included in the detector construction.
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6 - VISUALISATION
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An example "vis.mac" will be included in a future release. For now, please
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refer to other examples for a few suggestions.
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