DOI QR코드

DOI QR Code

Development of High Energy Particle Detector for the Study of Space Radiation Storm

  • Jo, Gyeong-Bok (Department of Astronomy and Space Science, Chungnam National University) ;
  • Sohn, Jongdae (Department of Physics, Korea Advanced Institute of Science and Technology) ;
  • Choi, Cheong Rim (Department of Physics, Korea Advanced Institute of Science and Technology) ;
  • Yi, Yu (Department of Astronomy and Space Science, Chungnam National University) ;
  • Min, Kyoung-Wook (Department of Physics, Korea Advanced Institute of Science and Technology) ;
  • Kang, Suk-Bin (Department of Physics, Korea Advanced Institute of Science and Technology) ;
  • Na, Go Woon (Department of Physics, Ehwa Womans University) ;
  • Shin, Goo-Hwan (Satellite Technology Research Center, Korea Advanced Institute of Science and Technology)
  • Received : 2014.08.29
  • Accepted : 2014.09.05
  • Published : 2014.09.15

Abstract

Next Generation Small Satellite-1 (NEXTSat-1) is scheduled to launch in 2017 and Instruments for the Study of Space Storm (ISSS) is planned to be onboard the NEXTSat-1. High Energy Particle Detector (HEPD) is one of the equipment comprising ISSS and the main objective of HEPD is to measure the high energy particles streaming into the Earth radiation belt during the event of a space storm, especially, electrons and protons, to obtain the flux information of those particles. For the design of HEPD, the Geometrical Factor was calculated to be 0.05 to be consistent with the targets of measurement and the structure of telescope with field of view of $33.4^{\circ}$ was designed using this factor. In order to decide the thickness of the detector sensor and the classification of the detection channels, a simulation was performed using GEANT4. Based on the simulation results, two silicon detectors with 1 mm thickness were selected and the aluminum foil of 0.05 mm is placed right in front of the silicon detectors to shield low energy particles. The detection channels are divided into an electron channel and two proton channels based on the measured LET of the particle. If the measured LET is less than 0.8 MeV, the particle belongs to the electron channel, otherwise it belongs to proton channels. HEPD is installed in the direction of $0^{\circ}$, $45^{\circ}$, $90^{\circ}$ against the along-track of a satellite to enable the efficient measurement of high energy particles. HEPD detects electrons with the energy of 0.1 MeV to several MeV and protons with the energy of more than a few MeV. Thus, the study on the dynamic mechanism of these particles in the Earth radiation belt will be performed.

Keywords

References

  1. Bethe AH, Ashkin J, Passage of Radiations through Matter in Experimental Nuclear Physics, Vol. 3, ed. Segre E (Wiley, New York, 1953), 166-357.
  2. Choi CR, Sohn JD, Lee JC, Seo YM, Kang SB, et al., Scientific Missions and Technologies of the ISSS on board the NEXTSat-1, JASS, 31, 73-81(2014). http://dx.doi. org/10.5140/JASS.2014.31.1.73
  3. Schiller QG, Mahendarkumar A, Li X., REPTILE: A Miniaturized Detector for a CubeSat Mission to Measure Relativistic Particles in Near-Earth Space, 24th Small Satellite Conference, AIAA/USU, Logan, UT, 9-10 Aug (2010)
  4. Sohn JD, Oh SY, , Yi Y, Min KW, Lee DY, et al., A Design of Solar Proton Telescope for Next Generatioin Small Satellite, JASS, 29, 343-349(2012). http://dx.doi.org/10.5140/JASS.2012.29.4.343
  5. Sullivan JD, Geometrical factor and directional response of single and multi-element particle telescope, NucIM, 95, 5-11 (1971). http://dx.doi.org/10.1016/0029-554X(71)90033-4
  6. Van Allen JA, Ludwig GH, Ray EC, Mcllwain CE, Observation of high intensity radiation by satellites 1958 Alpha and Gamma, Jet Propul, 28, 588-592 (1958). https://doi.org/10.2514/8.7396

Cited by

  1. Pitch-angle diffusion of electrons through growing and propagating along a magnetic field electromagnetic wave in Earth's radiation belts vol.22, pp.6, 2015, https://doi.org/10.1063/1.4923267