geant4 implementation of the sixs sensor unit of · pdf filebepicolombo mission using cad...
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15.02.08 Francisco García – Afternoon Session 2, University of Tokyo - Japan
GEANT4 Implementation of theSIXS sensor unit of
Bepicolombo missionUsing CAD conversion into GDML
5th GEANT4 Space Users’ Workshop
15.02.08 Francisco García – Afternoon Session 2, University of Tokyo - Japan 2
OUTLINEIntroduction and Motivation
SIXS sensor Unit
Conversion into GDML file format
Simulations and results
General Considerations
5th GEANT4 Space Users’ Workshop
15.02.08 Francisco García – Afternoon Session 2, University of Tokyo - Japan 3
BepiColombo is EuropeanSpace Agency’s (ESA) missionto Mercury. It has beennamed after the Italianmathematician and engineerGiuseppe (Bepi) Colombo,known especially for hisworks on Mercury. Thespacecraft will set off in 2013on a journey lasting about sixyears
Introduction and Motivation
5th GEANT4 Space Users’ Workshop
15.02.08 Francisco García – Afternoon Session 2, University of Tokyo - Japan 4
SIXS sensor unitParticle Spectrometer
The Solar Intensity X-ray and Particlespectrometer
SIXS Sensor Unit
5th GEANT4 Space Users’ Workshop
15.02.08 Francisco García – Afternoon Session 2, University of Tokyo - Japan 5
Conversion into GDML file format%$&
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.TREEFILE
.GEOMFILE
STEP WRITERLIBRARIES
.GDML fileTessellate Solids
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GDMLSCHEMA
.GDMLFILE
GDMLREADER
0’$& )&,+ (*+’1
5th GEANT4 Space Users’ Workshop
15.02.08 Francisco García – Afternoon Session 2, University of Tokyo - Japan 6
ST-Viewer Tree
5th GEANT4 Space Users’ Workshop
15.02.08 Francisco García – Afternoon Session 2, University of Tokyo - Japan 7
•GDML Schema•Vertices•Facets•Coordinates•Rotation Matrix•Materials•Physical andLogical Volumes•Placement•World Volume
GDML File Structure
5th GEANT4 Space Users’ Workshop
15.02.08 Francisco García – Afternoon Session 2, University of Tokyo - Japan 8
5th GEANT4 Space Users’ Workshop
15.02.08 Francisco García – Afternoon Session 2, University of Tokyo - Japan
Simulations and Results
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5th GEANT4 Space Users’ Workshop
15.02.08 Francisco García – Afternoon Session 2, University of Tokyo - Japan 10
5th GEANT4 Space Users’ Workshop
15.02.08 Francisco García – Afternoon Session 2, University of Tokyo - Japan 11
Solar Protons’Fluencedistribution forthe Total Mission
GEANT4simulations –irradiation field:Isotropic sphere
5th GEANT4 Space Users’ Workshop
15.02.08 Francisco García – Afternoon Session 2, University of Tokyo - Japan 12
Dose Distribution:Elemente is locatedinside the MultiLayerInsulator
Dose, GyC
ount
s, a
.u.
1.60 104GEANT4
2.03 104Dose at 6 mm Al
Total Dose in Si,rad
Spec./Tools
•Low EM Physicslist•GPS particlegeneration•106 Events in 2hours•Cut 100 m
5th GEANT4 Space Users’ Workshop
15.02.08 Francisco García – Afternoon Session 2, University of Tokyo - Japan
General ConsiderationsVolume overlapping need to be prevented by means of usingCAD design and GEANT4 tools
A separation between volumes of the order of 10 micronscan help to prevent volumen overlapping
Theaded objects are very code expensive i.e. a bolt of 15 cmlong and 6 mm diameter can reach upto 56klines
Some work is needed to be done to keep in the GDML filethe solid names from the original CAD models
The requirements for the external GEANT4 visualizationprograms need to be reviewed because the tessellatedmodels have pushed them to the limit.
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