• Title/Summary/Keyword: 우주 방사선

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Radiation Exposure of an Astronaut subject to Various Space Radiation Environments and Shielding Conditions (다양한 우주방사선 환경과 차폐 조건에서 우주인이 받는 방사선 피폭량)

  • Chae, Myeong-Seon;Chung, Bum-Jin
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.38 no.10
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    • pp.1038-1048
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    • 2010

  • Radiation exposures of an astronaut during the space travels to the International Space Station(ISS) of the Soyuz and the Moon of the Apollo, were calculated considering the altitude, boarding time, period of stay, kinds of spaceships and space suits. The calculated radiation exposures decrease dramatically according to the thickness of the shielding by the wall of the spaceships and by the space suits. For the space travel to the ISS of Soyuz at Low Earth orbit, the thickness of the spaceship required to optimally reduce the radiation exposure is 3 cm. For the Extravehicle Mobility Unit(EMU) the exposures are minimized at 4 cm of the aluminized Mylar and 5 cm of the Demron, respectively. The aluminized Mylar showed better radiation shielding than the Demron which contains the high Z materials. The radiation exposures of an astronaut were $4.2\times10^{-6}$ Sv for the ISS travel and $4.3\times10^{-5}$ Sv for the Moon explore. The high concentration of the high energy proton flux at the surface of the Moon results in high radiation exposure. The calculation scheme and results of this study can be used in the design of the shielding performance of a spaceship and space suits.

  • https://doi.org/10.5139/JKSAS.2010.38.10.1038 인용 PDF KSCI

뉴스클릭 - 가짜 예술품 잡아내는 우주방사선탐지기

  • 한국광학기기산업협회
    • The Optical Journal
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    • s.174
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    • pp.30-31
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    • 2019

  • 유럽핵물리입자연구소, CERN은 대형강입자가속기(LHC)가 작동할 때 얻을 수 있는 순간의 장면을 스냅샷으로 남기기 위해 충분한 민감도와 동작 범위를 가진 탐지기가 필요했다. 이렇게 개발된 방사선 탐지기술은 유럽우주국 ESA에 의해 우주로 날아갔다. 그리고 이제는 역사적인 예술품을 분석하고, 위조품을 발견하는 데 사용되고 있다.

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Design of Simple Shielding Handkerchief to Protect the Passenger's Thyroid (비행기 이용승객의 갑상선 차폐를 위한 간편한 손수건 고안)

  • Jung, Hongmoon;Jung, Jaeeun
    • Journal of the Korean Society of Radiology
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    • v.13 no.1
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    • pp.87-93
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    • 2019

  • Recently, the number of passengers using airplanes is rapidly increasing due to the increase of overseas travelers. Therefore, the probability of exposure to natural radiation due to altitude is increasing due to the increase in flight time. Cosmic-ray penetrates the Earth's magnetic field belt Van Allen, which is located at an altitude of 400 km to 1200 km. Most cosmic rays are blocked at Van Allen belt. However, cosmic-ray could be not completely blocked, and a small amount of cosmic-ray affects the earth. In general, if the altitude was increased by 100m, the natural exposure dose increased by 0.03 mSv on the Earth. In this study, I tried to minimize the exposure to natural radiation in airplanes when boarding airplanes. Especially, I was aimed to minimize radiation exposure by protecting the highly sensitive thyroid gland among human organs. According to the results of the study, the designed shielding handkerchief was able to shield cosmic natural radiation dose by more than 70%. In conclusion, the application of the shielding handkerchief made in this study can be effectively shield natural radiation.

  • https://doi.org/10.7742/jksr.2019.13.1.87 인용 PDF KSCI HTML