Gabriele Cosmo
125 lines
5.4 KiB
Plaintext
125 lines
5.4 KiB
Plaintext
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=========================================================
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Geant4 - Radioprotection example
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=========================================================
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README
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---------------------
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The radioprotection example is developed and mantained by Susanna Guatelli and Jeremy Davis,
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Centre For Medical Radiation Physics (CMRP), University of Wollongong, NSW, Australia.
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------------------------------------------------------------------------
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Contact: susanna@uow.edu.au
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jad028@uowmail.edu.au
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geant4-advanced-examples@cern.ch
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------------------------------------------------------------------------
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List of authors:
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S. Guatelli and J. Davis.
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-----------------------------------------------------------------
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----> Introduction.
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Radioprotection example models a simplified diamond microdosimeter, developed by
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Prof. Anatoly Rosenfeld and his team at the Centre For Medical Radiation Physics,
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CMRP, University of Wollongong, NSW, Australia. The design of the device is documented in
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J. Davis, et al., "Characterisation of a novel diamond-based microdosimeter prototype
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for radioprotection applications in space environments",IEEE Transactions on Nuclear Science,
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Vol. 59, pp. 3110-3116, 2012.
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The diamond microdosimeter is set in a vacuum. An isotropic field of Galactic Cosmic Rays (GCR) protons
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is incident on the device.
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The energy deposition is calculated in one of the sensitive detectors.
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In particular in this example it is shown how to:
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- model a realistic isotropic field of GCRs by means of the General Particle Source
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- model a realistic detector in Geant4
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- retrieve the information of secondary particles originated in the SV
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- define the physics by means of a Geant4 Modular Physics List
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- characterise the response of a realistic detector.
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- save results in an analysis ROOT file using the Geant4 analysis component.
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The example can be executed in multithreading mode
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----> 1.Experimental set-up.
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The diamond microdosimeter is set in the center of the world. The world is a box with size 1 m, filled with vacuum.
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Four SV structures are modelled, but only one has been made active (SV_phys1)
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The primary radiation field is defined by means of the GeneralParticleSource in the file
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primary.mac
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-------------------------------------------------------------------------
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----> 2.SET-UP
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A standard Geant4 example CMakeLists.txt is provided.
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Setup for analysis:
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By default, the example has no analysis component.
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To compile and use the application with the analysis on, build the example with the following command:
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cmake -DWITH_ANALYSIS_USE=ON -DGeant4_DIR=/path/to/Geant4_installation /path/to/radioprotection example
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plot.C is provided to plot the results of the simulation, contained
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in the radioprotection.root file. If the user intends to use this macro, ROOT must be installed
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(http://root.cern.ch/drupal/).
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------------------------------------------------------------------------
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----> 3.How to run the example.
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- Batch mode:
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./radioprotection run.mac
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- Interative mode:
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./radioprotection
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vis.mac is the default macro, executed in interactive mode.
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---------------------------------------------------------------------------------
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----> 4. Primary radiation Field
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The radiation field is defined with the General Particle Source.
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Look at the macro primary.mac .
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NOTE: To maximise efficiency the field has been modelled with a limiting angle to reduce redundant events.
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------------------------------------------------------------------------
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----> 5. Simulation output
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**** SEQUENTIAL MODE
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The output is radioprotection.root, containing
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- an ntuple with the A, Z, and energy of the secondary particles originated in the diamond microdosimeters.
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- an ntuple withe the energy spectrum (in MeV) of primary particles.
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- an ntuple with the energy deposition per event(in keV) in the SV.
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**** MULTITHREAD mode
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output files:
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radioprotection.root_t0
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..
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..
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radioprotection.root_t#
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where # is the number of threads
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type: source MergeFiles to merge the output of each thread in a single one
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-------------------------------------------------------------------------------
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----> 6.Visualisation
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a macro is provided ad example of visualisation: vis.mac
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For any problem or question please contact Susanna Guatelli, susanna@uow.edu.au
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------------------------------------------------------------------------------
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-----> Future developments
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1) The code will be refined.
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2) A silicon microdosimeter will be modelled as well in the next future.
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