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Modeling of SNAP in Geant4

Modeling of SNAP in Geant4. Justin F. McDowell Florida A&M University. Purpose. We desire to build a model of SNAP in Geant4 and automate this process. To do this by hand would take years. We will be using a “Nibble” file to automate the reconstruction process.

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Modeling of SNAP in Geant4

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  1. Modeling of SNAP in Geant4 Justin F. McDowell Florida A&M University

  2. Purpose • We desire to build a model of SNAP in Geant4 and automate this process. To do this by hand would take years. • We will be using a “Nibble” file to automate the reconstruction process. • Build an interface to go directly from Solidworks/IDEAS to Geant4 for simulation purposes.

  3. What is a Nibble? • A “nibble” is a 3-D cube of SNAP satellite that gives information on it’s volume, density, position, center of gravity and material composition, generated by Herman Cease. • This will give us the ability to characterize large amounts of the satellite. • Focal plane and electronics will be implemented as hand located pieces.

  4. Truncated Nibble File • gusset_a_MOD8 PART 0 0 0 7317.586 -975.99906 12.625 -1046.755 • Tank-100_MOD2 PART 0 0.012 0 1199429.684 -238.58723 -344.555 -1046.564 • Tank-100_MOD1 1 PART 0 0.012 0 1199442.435 -238.5867 344.542 -1046.56 • Tank-100_MOD6 PART 0 0.011 0 1089330.775 400.31908 -46.387 -1046.538 • Tank-100_MOD7 PART 0 0.011 0 1089341.15 400.31967 46.387 -1046.538 • Tank-100_MOD1 2 PART 0 0.011 0 1074685.396 -146.35326 344.145 -1045.955 • Tank-100_MOD1 PART 0 0.011 0 1074688.224 -146.35943 -344.156 -1045.954 • Preamp.2_MOD1 PART 0 0.001 0 110379.332 54.1134 -1078.039 -1045.398 • Preamp.2_MOD2 PART 0 0.005 0 477583.1 104.1134 -1078.039 -1045.398 • Preamp.2_MOD3 PART 0 0.005 0 459981.093 -990.23413 453.784 -1045.398 • Preamp.2_MOD4 PART 0 0.001 0 107696.708 -939.2239 459.955 -1045.398 • Preamp.2_MOD5 PART 0 0 0 20284.631 -992.62117 513.762 -1045.398

  5. Exercise in Geometry • This is an exercise consisting of four disks used to represent the CCD’s at the focal plane. • This demonstrates control of creation and placement of geometries in a Vacuum World. • Disks are made of Al, Si, Ni, Mo in a Vacuum. • Not drawn to scale at this time to verify materials and orientation.

  6. Summary and Plans • Use C++ to read the nibble file and generate source code. • Experiment with material mixtures consistent with what the nibble file might report.

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