Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
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A NUMERICAL METHOD TO ANALYZE GEOMETRIC FACTORS OF A SPACE PARTICLE DETECTOR RELATIVE TO OMNIDIRECTIONAL PROTON AND ELECTRON FLUXES

  • Pak, Sungmin (School of Space Research, Kyung Hee University) ;
  • Shin, Yuchul (School of Space Research, Kyung Hee University) ;
  • Woo, Ju (School of Space Research, Kyung Hee University) ;
  • Seon, Jongho (School of Space Research, Kyung Hee University)
  • Received : 2018.06.08
  • Accepted : 2018.08.01
  • Published : 2018.08.31
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Abstract

A numerical method is proposed to calculate the response of detectors measuring particle energies from incident isotropic fluxes of electrons and positive ions. The isotropic flux is generated by injecting particles moving radially inward on a hypothetical, spherical surface encompassing the detectors. A geometric projection of the field-of-view from the detectors onto the spherical surface allows for the identification of initial positions and momenta corresponding to the clear field-of-view of the detectors. The contamination of detector responses by particles penetrating through, or scattering off, the structure is also similarly identified by tracing the initial positions and momenta of the detected particles. The relative contribution from the contaminating particles is calculated using GEANT4 to obtain the geometric factor of the instrument as a function of the energy. This calculation clearly shows that the geometric factor is a strong function of incident particle energies. The current investigation provides a simple and decisive method to analyze the instrument geometric factor, which is a complicated function of contributions from the anticipated field-of-view particles, together with penetrating or scattered particles.

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References

  1. Agostinelli, S., et al. 2003, Geant4 - A Simulation Toolkit, NIMPR, 506, 250 https://doi.org/10.1016/S0168-9002(03)01368-8
  2. Allison, J. 2007, Facilities and Methods: Geant4 - A Simulation Toolkit, NPN, 17, 20
  3. Asikainen, T., & Mursular, M. 2013, Correcting the NOAA/MEPED Energetic Electron Fluxes for Detector Efficiency and Proton Contamination, JGR, 118, 6500
  4. Baker, D. N. 2002, How to Cope with Space Weather, Science, 297, 1486 https://doi.org/10.1126/science.1074956
  5. Borovsky, J. E. 2017, Time-Integral Correlations of Multiple Variables With the Relativistic-Electron Flux at Geosynchronous Orbit: The Strong Roles of Substorm-Injected Electrons and the Ion Plasma Sheet, JGR, 122
  6. Chauvie, S., et al. 2004, Geant4 Low Energy Electromagnetic Physics, IEEE SCRNS, 3, 1881
  7. Durante, M., & Cucinotta, F. A. 2011, Physical Basis of Radiation Protection in Space Travel, RMP, 83, 1245 https://doi.org/10.1103/RevModPhys.83.1245
  8. Ersmark, T. 2006, Geant4 Monte Carlo Simulations of the International Space Station Radiation Environment, Thesis Work
  9. Fioretti, V., et al. 2017, Geant4 Simulations of Soft Proton Scattering in X-Ray Optics, EA, 44, 413
  10. Friedel, R., et al. 2005, Intercalibration of Magnetospheric Energetic Electron Data, SW, 3
  11. Ivanchenko, V. N. 2004, Geant4: Physics Potential for Instrumentation in Space and Medicine, NIMPR, 525, 402 https://doi.org/10.1016/j.nima.2004.03.104
  12. Ivanchenko, V. N., et al. 2010, Geant4 Models for Simulation of Multiple Scattering, JP, 219
  13. Jun, I., et al. 2002, Monte Carlo Simulation of the Galileo Energetic Particle Detector, NIMPR, 490, 464
  14. Kim, Y., et al. 2012, Computational Method for Analyzing the Cumulative Ionizing Effect from Solar-Terrestrial Charged Particles and Cosmic Rays with Geant4, JKPS, 61, 653 https://doi.org/10.3938/jkps.61.653
  15. Lanzerotti, L. J. 2001, Space Weather Effects on Technologies, SW, 125, 11
  16. Martinez, L. M., & Kingston, J. 2012, Space Radiation Analysis: Radiation Effects and Particle Interaction Outside the Earth's Magnetosphere Using GRAS and GEANT4, AA, 72, 156
  17. Nagatsuma, T., et al. 2017, Space Environment Data Acquisition Monitor Onboard Himawari-8 for Space Environment Monitoring on the Japanese Meridian of Geostationary Orbit, EPS
  18. NCRP 2006, Information Needed to Make Radiation Protection Recommendations for Space Missions Beyond Low-Earth Orbit, NCRP, 153
  19. Ni, B., et al. 2011, Analysis of Radiation Belt Energetic Electron Phase Space Density Using THEMIS SST Measurements: Cross-Satellite Calibration and a Case Study, JGR, 116, A03208
  20. Park, S., et al. 2014, Computational Method for Calculating Geometric Factors of Instruments Detecting Charged Particles in the 5-500 keV Energy Range with Deflecting Electric Field, CAP, 14, 132
  21. Piet, A. S., et al. 2006, A Model for the Geostationary Electron Environment: POLE, From 30 keV to 5.2 MeV, IEEE TNS, 53
  22. Poole, C. M., et al. 2012, A CAD Interface for GEANT4, AP&ESM, 35, 329
  23. Rodger, C. J., et al. 2010, Use of POES SEM-2 Observations to Examine Radiation Belt Dynamics and Energetic Electron Precipitation into The Atmosphere, JGR, 115, A04202
  24. Salvat, F., et al. 2003, PENELOPE - A Code System for Monte Carlo Simulation of Electron and Photon Transport, IlM
  25. Sempau, J., et al. 2003, Experimental Benchmarks of the Monte Carlo Code PENELOPE, NIMPR, 207, 107
  26. Sullivan, J. D. 1971, Geometric Factor and Directional Response of Single and Multi-Element Particle Telescopes, NIM, 95, 5 https://doi.org/10.1016/0029-554X(71)90033-4
  27. Suparta, W., & Zulkeple, S. K. 2014, Spatial Analysis of Galactic Cosmic Ray Particles in Low Earth Orbit/Near Equator Orbit Using SPENVIS, JP, 495
  28. Thomas, G. R., & Willis, D. M. 1972, Analytical Derivation of the Geometric Factor of a Particle Detector Having Circular or Rectangular Geometry, JP, 5, 260
  29. Turner, D. L., et al. 2012, Explaining Sudden Losses of Outer Radiation Belt Electrons during Geomagnetic Storms, NP, 8, 208
  30. Valentin, A., et al. 2012, Geant4 Physics Processes for Microdosimetry Simulation: Very Low Energy Electromagnetic Models for Protons and Heavy Ions in Silicon, NIMPR, 287, 124
  31. Wilson, J. W., et al. 1991, Transport Methods and Interactions for Space Radiations, NASA RP-1257
  32. Wilson, J. W., et al. 2005, Verification and Validation: High Charge and Energy (HZE) Transport Codes and Future Development, NASA TP-2005-213784
  33. Wu, Y., & Armstrong, T. P. 1988, Charged Particle Response of Magnetic Deflection System for Galileo Jupiter Orbiter, NIMPR, 265, 561 https://doi.org/10.1016/S0168-9002(98)90029-8
  34. Yando, K., et al. 2011, A Monte Carlo Simulation of the NOAA POES Medium Energy Proton and Electron Detector Instrument, JGR, 116, A10231
  35. Zhao, X., et al. 2013, A Geometric Factor Calculation Method Based on the Isotropic Flux Assumption, CP, 37, 126201