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대형 적외선 우주망원경 SPICA/FPC-G의 정밀 별추적 요구사항과 타당성 연구
정웅섭,이대희,표정현,문봉곤,박성준,이창희,박영식,한원용,남욱원,Jeong, Woong-Seob,Lee, Dae-Hee,Pyo, Jeonghyun,Moon, Bongkon,Park, Sung-Joon,Ree, Chang Hee,Park, Youngsik,Han, Wonyong,Nam, Ukwon,Matsumoto, Toshio 한국천문학회 2012 天文學論叢 Vol.27 No.5
The SPICA (SPace Infrared Telescope for Cosmology & Astrophysics) project is a next-generation infrared space telescope optimized for mid- and far-infrared observation with a cryogenically cooled 3m-class telescope. It will achieve the high resolution as well as the unprecedented sensitivity from mid to far-infrared range. The FPC (Focal Plane Camera) proposed by KASI as an international collaboration is a near-infrared instrument. The FPC-S and FPC-G are responsible for the scientific observation in the near-infrared and the fine guiding, respectively. The FPC-G will significantly reduce pointing error down to below 0.075 arcsec through the observation of guiding stars in the focal plane. We analyzed the pointing requirement from the focal plane instruments as well as the error factors affecting the pointing stability. We also obtained the expected performance in operation modes. We concluded that the FPC-G can achieve the pointing stability below 0.075 arcsec which is the requirement from the focal plane instruments.
정웅섭,선광일,표정현,이대희,박영식,이창희,문봉곤,박성준,남욱원,박장현,이덕행,차상목,이성호,육인수,안경진,조정연,이형목,한원용,Jeong, Woong-Seob,Matsumoto, Toshio,Seon, Kwangil,Pyo, Jeonghyun,Lee, Dae-Hee,Park, Youngsik,Ree, Chang Hee,Moon, Bongkon,Park, 한국천문학회 2012 天文學會報 Vol.37 No.2
The main payload of Science and Technology Satellite 3 (STSAT-3), Multipurpose InfraRed Imaging System (MIRIS) is the first Korean infrared space mission to explore the near-infrared sky with a small astronomical instrument developed by KASI. The 8-cm passively cooled telescope with a wide field of view (3.67 deg. ${\times}$ 3.67 deg.) will be operated in the wavelength range from 0.9 to $2{\mu}m$. It will carry out wide-band imaging and the Paschen-${\alpha}$ emission line survey. After the calibration of MIRIS in our laboratory, MIRIS has been delivered to SaTReC and successfully assembled into the STSAT-3. The main purposes of MIRIS are to perform the observation of Cosmic Infrared Background (CIB) at two wide spectral bands (I and H band) and to survey the Galactic plane at $1.88{\mu}m$ wavelength, the Paschen-${\alpha}$ emission line. CIB observation enables us to reveal the nature of degree-scale CIB fluctuation detected by the IRTS (Infrared Telescope in Space) mission and to measure the absolute CIB level. The MIRIS will continuously monitor the seasonal variation of the zodiacal light towards the both north and south ecliptic poles for the purpose of calibration as well as the effective removal of zodiacal light. The Pashen-${\alpha}$ emission line survey of Galactic plane helps us to understand the origin of Warm Ionized Medium (WIM) and to find the physical properties of interstellar turbulence related to star formation. Here, we also discuss the observation plan with MIRIS.
Progress Report on Development of the MIRIS, the Main Payload of STSAT-3
박영식,한원용,이대희,정웅섭,문봉곤,박귀종,표정현,이덕행,남욱원,박장현,선광일,양선철,박종오,이승우,이형목,Park, Youngsik,Han, Wonyong,Lee, Dae-Hee,Jeong, Woong-Seob,Moon, Bongkon,Park, Kwijong,Pyo, Jeonghyun,Lee, Duk-Hang,Nam, Uk-Won,Park, Jang-H 한국천문학회 2012 天文學會報 Vol.37 No.2
MIRIS (Multipurpose Infra-Red Imaging System), the main payload of STSAT-3 (Science and Technology Satellite-3), is the first Korean Infrared Space Telescope developed by KASI (Korea Astronomy and Space Science Institute). The FM (fight model) of MIRIS has been recently completed, and various performance tests have been made to measure system parameters such as readout noise, system gain, linearity, and dark current. The MIRIS FM has been integrated to the satellite system for the environment tests scheduled in September 2012. The MIRIS is expected to be launched in November 2012.
우주방사선측정용 조직등가비례계수관의 교정과 의료분야에서의 응용
김성환(Kim Sunghwan),남욱원(Nam Uk-Won),이재진(Lee Jaejin),표정현(Pyo Jeonghyun),박원기(Park Won-Kee),문봉곤(Moon Bong-Kon),김현수(Yeonsu Kim),백금문(Geum Mun Baek) 한국방사선학회 2014 한국방사선학회 학술대회 논문집 Vol.2014 No.추계
조직등가비례계수기는 우주에서의 복잡한 방사선 환경에서 방사선의 선에너지전이 스펙트럼을 측정하여 등가선량을 측정할 수 있는 검출기이다. 본 연구에서는 국제우주정거장에서 방사선량 모니터링에 활용할 수 있은 조직등가비례계수기를 개발하고 그 특성을 평가하였다. 소형 디지털화된 조직등가비례계수기는 미소선량측정을 위하여 직경 2 μm 크기의 선량을 모사하도록 설계 제작하였다. 개발된 검출기는 한국표준연구원의 252Cf 중성자 표준선원으로 교정하였으며, 채널- 선에너지전이 교정계수는 0.2 keV/μm-CH 이었다 Tissue equivalent proportional counter (TEPC) can measure the LET spectrum and calculate the equivalent dose for the complicated radiation field in space. In this paper, we developed and characterized a TEPC for radiation monitoring in International Space Station (ISS). The compact digital type TEPC which can simulate a 2 μm of the site diameter for micro-dosimetry has been tested with 252Cf neutron standard source in KRISS. The determined calibration factor of channel-LET was about 0.2 keV/μm-CH.