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학술저널
저자정보
조경복 (충남대학교) 손종대 (KAIST) 최정림 (한국과학기술원) 이유 (충남대학교) 민경욱 (한국과학기술원) 강석빈 (한국과학기술원) 나고운 (이화여자대학교) 신구환 (한국과학기술원)
저널정보
한국우주과학회 Journal of Astronomy and Space Sciences Journal of Astronomy and Space Sciences 제31권 제3호
발행연도
2014.9
수록면
277 - 283 (7page)
DOI
http://dx.doi.org/10.5140/JASS.2014.31.3.277

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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 comprisingISSS and the main objective of HEPD is to measure the high energy particles streaming into the Earth radiation belt duringthe event of a space storm, especially, electrons and protons, to obtain the flux information of those particles. For thedesign of HEPD, the Geometrical Factor was calculated to be 0.05 to be consistent with the targets of measurement andthe structure of telescope with field of view of 33.4° was designed using this factor. In order to decide the thickness of thedetector sensor and the classification of the detection channels, a simulation was performed using GEANT4. Based on thesimulation results, two silicon detectors with 1 mm thickness were selected and the aluminum foil of 0.05 mm is placedright in front of the silicon detectors to shield low energy particles. The detection channels are divided into an electronchannel 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 of0°,45°,90° against the along-track of a satellite to enable the efficient measurement of high energy particles. HEPD detectselectrons with the energy of 0.1 MeV to several MeV and protons with the energy of more than a few MeV. Thus, the studyon the dynamic mechanism of these particles in the Earth radiation belt will be performed.

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