F. Romano *
on behalf of the Advanced Examples Working Group
Advanced examples:
updates and plan
15 th Geant4 Collaboration Workshop
4 - 8 October 2010, ESA/ESTEC, Noordwijk, The Netherlands
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Outline
Generalities, members and coordination
Existing and currently maintained examples
• Report on updates and new developments
Plan and coming examples
• Review of physics
• Cexmc application
• Gamma Knife
Receipt used to proceed
WG mission:
Investigate, evaluate and demonstrate the Geant4 capabilities in various experimental domains
Identify requirements for further Geant4 improvements and extension in new domains
Provide connection between developers and users
Users interested in publishing an example can submit his/her request
Code must be checked:
Software point of view
Physics point of view
Documentation must be submitted
Examples are regularly checked and maintained
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Coordination and web page
coordinator: G.A.P. Cirrone (INFN-LNS) deputy: L. Pandola (INFN-LNGS)
23 members
18 examples (+ 2 new examples coming)
• Actually based on wikispace
• Almost ready a new page based on Plone
http://geant4advancedexampleswg.wikispaces.com/
ADVANCED EXAMPLES
WIKI PAGES
Status of examples reported on the web site
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List of the examples and responsible
Example Responsible Description
air_shower T. Bernardo
Detection system for cosmic ray shower simulationams_Ecal M.Maire
Simulation of an Electromagnetic calorimeter allowing precise and three dimensional imaging of a lateral and longitudinal shower developmentbrachytherapy S.Guatelli
Dosimetry for endocavitary, interstitial and superficial brachytherapycomposite_calorimeter A.Dotti
A composite electromagnetic and hadronic calorimetergammaray_telescope F.Longo
A simplified typical gamma-ray telescope (such as GLAST), with advanced description of the detector responsehadrontherapy G.A.P.Cirrone
Simulation of a transport beam line for proton and ion therapyhuman_phantom G.A.P.Cirrone
Internal dosimetrylAr_Calorimeter A.Dotti
Simulation of the Forward Liquid Argon Calorimeter of the ATLAS Detector at LHCmedical_linac C.Andenna, B.Caccia G.A.P.Cirrone
A typical LINAC accelerator for IMRT, similar to one used in the clinical practice
microbeam S.Incerti
Simulation of a cellular irradiation microbeam line using a high resolution cellular phantommicrodosimetry S.Incerti
Simulation of a track structure in liquid water using the Geant4 DNA very low energy processesnanobeam S.Incerti
Simulation of a nanobeam line facilitypurging_magnet J.Apostolakis
Electrons travelling through the magnetic field of a strong purging magnet in a radiotherapy treatment headradioprotection S.Guatelli, M.G.Pia
Dose distributions in interplanetary space radiation environment, for the radioprotection of astronauts in space vehicles and planetary habitat.Rich A.Dotti
A RICH detector in a set-up similar to the LHCb test beamunderground_physics A.Howard
A simplified typical dark matter detector (such as the Boulby Mine experiment)xray_fluerescence A.Mantero
Elemental composition of material samples through X-ray fluorescence spectraxray_telescope G.Santin
A simplified typical X-ray telescope (such as XMM-Newton or Chandra)Recent updates and developments
Three examples have been removed from the 9.3 release because not maintained:
cosmicray_charging
radiation_monitor
Tiara
Removal of obsolete visualization methods
Recent new developments:
Hadrontherapy
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Updates of Hadrontherapy
Implementation of modular geometries
Use of ROOT environment for data storage
Possibility of storing dose and fluence of secondary particles
Complete simulation of the carbon beam line at LNS-INFN of Catania (for physics and radiobiological experiments)
Test-bench for the development and implementation of LET and RBE calculations
Geant4 9.3 patch 1
Standard electromagnetic models (opt3) G4BinaryLigthIon
C12 ions @ 62 AMeV
Updates of medical_linac
Comparison with measurements performed on dedicated phantoms composed by different density materials
Reconstruction of different space phases for specific kinds of clinical accelerators on the market
Activity of debug and update
Future implementation of DICOM
and simulation of rotating gantry
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Plan and coming examples
• Review of the physics implemented in the examples by experts and responsible
• Make a wider use of physics lists (most examples developed when physics lists were not available)
• Introduction of a new example for the simulation of setup acceptances in specific experimental setups (Cexmc).
• Introduction of a new example in the medical physics domain
for the simulation of Stereotactic Radiosurgery techinques
(Gamma Knife).
Cexmc application
(Petersburg Nuclear Physics Laboratory group)
Charge exchange Monte-Carlo (Cexmc) application
The program was used to find the best geometry of a physical setup and calculate acceptances in charge exchange hadronic processes:
π⁻p → π⁰n π⁻p → ηn
Differential cross-section in a given solid angle deduced from experimental data and the value of acceptance
• cylindrical liquid hydrogen target
• 2 calorimeters (6x4 CsI crystals)
• monitor counter
• 2 veto detector
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GammaKnife application
(INFN-LNS group, Catania)
Stereotactic Radiosurgery with Gamma Knife is used to treat brain disorders which are often inaccessible for conventional surgery one single high dose session
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60Co sources in a hemispherical arrangement
Gamma ray beams converge through a collimator system to a common focal point (isocentre)
Leksell Gamma Knife ® C
Installed at the “Cannizzaro Hospital”
in Catania (since 2005)
Comparison of homogeneous and inhomogeneous phantom
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