79 lines
2.3 KiB
Plaintext
79 lines
2.3 KiB
Plaintext
=========================================================
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Geant4 - spower example
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=========================================================
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README file
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----------------------
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CORRESPONDING AUTHOR
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S. Incerti et al. (a, *)
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a. LP2i, IN2P3 / CNRS / Bordeaux University, 33175 Gradignan, France
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* e-mail: incerti@lp2ib.in2p3.fr
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---->0. INTRODUCTION.
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The spower example shows how to calculate stopping power of particles
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in liquid water using the Geant4-DNA physics processes and models.
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This example is provided by the Geant4-DNA collaboration.
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These processes and models are further described at:
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http://geant4-dna.org
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Any report or published results obtained using the Geant4-DNA software shall
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cite the following Geant4-DNA collaboration publications:
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Med. Phys. 51 (2024) 5873–5889
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Med. Phys. 45 (2018) e722-e739
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Phys. Med. 31 (2015) 861-874
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Med. Phys. 37 (2010) 4692-4708
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Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
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and for this example:
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Nucl. Instrum. Meth. B 397 (2017) 45-50
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---->1. GEOMETRY SET-UP.
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The geometry is a 1 m radius sphere of liquid water (G4_WATER
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material). Particles are shot randomly from the sphere centre.
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Radius of the sphere, physics constructor, primary particle and
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energy can be controlled by the spower.in macro file.
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---->2. SET-UP
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Make sure G4LEDATA points to the low energy electromagnetic data files.
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The code can be compiled with cmake.
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It works in MT mode.
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---->3. HOW TO RUN THE EXAMPLE
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In interactive mode, run:
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./spower spower.in
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The spower.in macro allows a full control of the simulation.
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The computation of stopping power is performed in the
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SteppingAction::UserSteppingAction method.
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---->4. PHYSICS
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Specific physics constructors, called G4EmDNAPhysics_stationary*
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and adapted from G4EmDNAPhysics* are available to set all inelastic
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models in a stationary mode for the computation of the stopping
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power.
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---->5. SIMULATION OUTPUT AND RESULT ANALYSIS
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The accuracy of results may depend on incident statistics as well as
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on number of steps specified in the SteppingAction::UserSteppingAction
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method.
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The output results consist in a text file (spower.txt), containing :
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- energy of incident particles (in eV)
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- stopping power (in keV/um)
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- rms (i.e. standard deviation) on stopping power (in keV/um)
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