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SIMULATION OF THE TISSUE EQUIVALENT PROPORTIONAL COUNTER IN THE INTERNATIONAL SPACE STATION WITH GEANT4

Geant4를 활용한 국제우주정거장 내의 조직등가비례계수기 모의 실험

  • Received : 2012.03.31
  • Accepted : 2012.07.03
  • Published : 2012.07.31

Abstract

The International Space Station (ISS) orbits the Earth within the inner radiation belt, where high-energy protons are produced by collisions of cosmic rays to the upper atmosphere. About 6 astronauts stay in the ISS for a long period, and it should be important to monitor and assess the radiation environment in the ISS. The tissue equivalent proportional counter (TEPC) is an instrument to measure the impact of radiation on the human tissue. KASI is developing a TEPC as a candidate payload of the ISS. Before the detailed design of the TEPC, we performed simulations to test whether our conceptual design of the TEPC will work propertly in the ISS and to predict its performance. The simulations estimated that the TEPC will measure the dose equivalent of about 1:1 mSv during a day in the ISS, which is consistent with previous measurements.

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References

  1. Calson, P., Daly, C., Fuglesang, I., Gudowska, B., Lund-Jenson, B., Nieminen, P., Pearce, M., & Santin, G., 2007, Geant4 Monte Carlo Simulations of the Belt Proton Radiation Environment on Board the International Space Station/Columbus, IEEE Transactions on Nuclear Science, 54, 4 https://doi.org/10.1109/TNS.2007.909898
  2. Green, J. C. & Kivelson, M. G., 2004, Relativistic Electrons in the Outer Radiation Belt: Differentiating Between Acceleration Mechanisms, J. Geophys. Res., 109, A03213 https://doi.org/10.1029/2003JA010153
  3. ICRP, 1991, Recommendation of the International Commission on Radiological Protection, ICRP Publication 60, Ann. ICRP 21, 1
  4. Nymmik, R. A., 1998, Radiation Environment Induced by Cosmic Ray Particle Fluxes in the International Space Station Orbit According to Recent Galactic and Solar Cosmic Ray Models, Adv. Space Res., 21, 12
  5. Selesnick, R. S., Looper, M. D., & Mewaldt, R. A., 2007, A Theoretical Model of the Inner Proton Radiation Belt, Space Weather, 5, S04003 https://doi.org/10.1029/2006SW000275
  6. Van Allen, J. A. & Frank, L. A., 1959, Radiation Around the Earth to a Radial Distance of 107,400 km, Nature, 183, 430 https://doi.org/10.1038/183430a0