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MIRIS 충격시험에서의 광학계 안정성 확보를 위한 연구
문봉곤,박성준,박귀종,이대희,정웅섭,박영식,표정현,남욱원,이덕행,이승우,한원용,Moon, B.K.,Kanai, Yoshikazu,Park, S.J.,Park, K.J.,Lee, D.H.,Jeong, W.S.,Park, Y.S.,Pyo, J.H.,Nam, U.W.,Lee, D.H.,Ree, S.W.,Matsumoto, Toshio,Han, W. 한국천문학회 2012 天文學論叢 Vol.27 No.3
MIRIS, Multi-purpose Infra-Red Imaging System, is the main payload of STSAT-3 (Korea Science & Technology Satellite 3), which will be launched in the end of 2012 (the exact date to be determined) by a Russian Dnepr rocket. MIRIS consists of two camera systems, SOC (Space Observation Camera) and EOC (Earth Observation Camera). During a shock test for the flight model stability in the launching environment, some lenses of SOC EQM (Engineering Qualification Model) were broken. In order to resolve the lens failure, analyses for cause were performed with visual inspections for lenses and opto-mechanical parts. After modifications of SOC opto-mechanical parts, the shock test was performed again and passed. In this paper, we introduce the solution for lens safety and report the test results.
적외선 우주배경복사 관측 실험 2(CIBER2) 국제 공동 연구
이대희,박원기,문봉곤,박성준,김민규,김건희,남욱원,표정현,정웅섭,박영식,김일중,한원용,Lee, D.H.,Park, W.K.,Moon, B.G.,Park, S.J.,Kim, M.G.,Kim, G.H.,Nam, U.W.,Pyo, J.,Jeong, W.S.,Park, Y.S.,Kim, I.J.,Han, W. 한국천문학회 2015 天文學論叢 Vol.30 No.1
First light galaxies have predictable linear clustering, and are expected to produce fluctuations with a characteristic spatial power spectrum, which peaks at an angular scale of ~ 10 arcminutes and in the $1-2{\mu}m$ spectral regions. The Cosmic Infrared Background ExpeRiment 2 (CIBER2) is a dedicated sounding rocket mission for measuring the fluctuations in the extragalactic infrared background light, following up the previous successful measurements of CIBER1. With a 28.5 cm telescope accompanied with three arms of camera barrels and a dual broadband filter on each H2RG (${\lambda}_c=2.5{\mu}m$) array, CIBER2 can measure 6 bands of wide field ($1.1{\times}2.2$ degrees) up to 3 AB magnitudes deeper than CIBER1. This project is leaded by California Institute of Technology/Jet Propulsion Laboratory, collaborating internationally with Institute of Space and Astronautical Science in Japan, Korea Astronomy and Space Science Institute, Korea Basic Science Institute, and Seoul National University. The Korean team is in charge of 1) one H2RG scientific array, 2) ground station hardware and software, 3) telescope lenses, and 4) flight and test bed electronics fabrication. In this paper, we describe the detailed activities of the Korean participation as well as the current status of the CIBER2 project.
양형석(H.S. Yang),김동락(D.L. Kim),이병섭(B.S. Lee),최연석(Y.S. Choi),신필권(P.K. Shin),이대희(D.H. Lee),남욱원(U.W. Nam) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
We developed a space infrared cryogenic system (PSICS) for ground observation. The system is cooled down to below 80K by a stirling cryocooler in order to increase sensitivity and decrease background noise of IR sensor. From the previous thermal numerical analyses, we knew that the major heat leak is thermal radiation and the minimizing heat leak by radiation is the core technique in this system. The thermal design of the PSICS have been performed and presented at 2005 KSME conferences. In this paper, the results of the cooling test and thermal insulation effects of multi-layer insulation are discussed.
이대희,양형석,남욱원,이성호,진호,김동락,박수종,김병혁,박성제,Lee, D.H.,Yang, H.S.,Nam, U.W.,Lee, S.,Jin, H.,Kim, D.L.,Pak, S.,Kim, B.H.,Park, S.J. 한국천문학회 2006 天文學論叢 Vol.21 No.2
We have tested the performance of the Proto-model of Space Infrared Cryogenic System (PSICS), which is a small infrared camera, developed by Korea Astronomy and Space science Institute (KASI), Korea Basic Science Institute (KBSI), Korea Institute of Machinery and Materials (KIMM), and i3system co., as a cooperation project. The purpose of PSICS is to ensure a technology of small infrared cryogenic system for future development of space infrared (IR) cameras. PSICS consists of cryogenic part, IR sensor and electronics part, and optical part. The performance test of each part and the integrated system has been completed successfully. PSICS will be used as a guiding camera for ground-based IR telescopes and a test system for developing a space-borne instrument.
문봉곤,정웅섭,차상목,이창희,박성준,이대희,육인수,박영식,박장현,남욱원,양순철,이선희,이승우,한원용,Moon, B.K.,Jeong, W.S.,Cha, S.M.,Ree, C.H.,Park, S.J.,Lee, D.H.,Yuk, I.S.,Park, Y.S.,Park, J.H.,Nam, U.W.,Matsumoto, Toshio,Yoshida, Seiji,Yang, 한국천문학회 2009 天文學論叢 Vol.24 No.1
MIRIS is the main payload of the STSAT-3 (Science and Technology Satellite 3) and the first infrared space telescope for astronomical observation in Korea. MIRIS space observation camera (SOC) covers the observation wavelength from $0.9{\mu}m$ to $2.0{\mu}m$ with a wide field of view $3.67^{\circ}\times3.67^{\circ}$. The PICNIC HgCdTe detector in a cold box is cooled down below 100K by a micro Stirling cooler of which cooling capacity is 220mW at 77K. MIRIS SOC adopts passive cooling technique to chill the telescope below 200 K by pointing to the deep space (3K). The cooling mechanism employs a radiator, a Winston cone baffle, a thermal shield, MLI (Multi Layer Insulation) of 30 layers, and GFRP (Glass Fiber Reinforced Plastic) pipe support in the system. Optomechanical analysis was made in order to estimate and compensate possible stresses from the thermal contraction of mounting parts at cryogenic temperatures. Finite Element Analysis (FEA) of mechanical structure was also conducted to ensure safety and stability in launching environments and in orbit. MIRIS SOC will mainly perform Galactic plane survey with narrow band filters (Pa $\alpha$ and Pa $\alpha$ continuum) and CIB (Cosmic Infrared Background) observation with wide band filters (I and H) driven by a cryogenic stepping motor.
이대희,남욱원,이성호,진호,육인수,김건희,박수종,Lee, D.H.,Nam, U.W.,Lee, S.,Jin, H.,Yuk, I.S.,Kim, K.H.,Pak, S. 한국천문학회 2006 天文學論叢 Vol.21 No.2
A Korean team (Korea Astronomy and Space Science Institute, Korea Basic Science Institute, and Kyung Hee University) takes part in an international cooperation project called CIBER (Cosmic Infrared Background ExpeRiment), which has begun with Jet Propulsion Laboratory (JPL) in USA and Institute of Space and Astronautical Science (ISAS) in Japan. CIBER is a rocket-borne instrument, of which the scientific goal is to measure the cosmic near-infrared extra-galactic background to search for signatures of primordial galaxy formation. CIBER consists of a wide-field two-color camera, a low-resolution absolute spectrometer, and a high-resolution narrow-band imaging spectrometer. The Korean team is in charge of the ground support electronics and manufacturing of optical parts of the narrow-band spectrometer, which will provide excellent opportunities for science and technology to Korean infrared groups.
육인수,진호,이성호,박영식,이대희,남욱원,박장현,한원용,이종웅,Yuk, I.S.,Jin, H.,Lee, S.,Park, Y.S.,Lee, D.H.,Nam, U.W.,Park, J.H.,Han, W.Y.,Lee, J.W. 한국천문학회 2007 天文學論叢 Vol.22 No.4
We have preliminarily designed two infrared optical systems of the multi-purpose infrared camera system (MIRIS) which is the main payload of STSAT-3. Each optical system consists of a Cassegrain telescope, a field lens and a 1:1 re-imaging lens system that is essential for providing a cold stop. The Cassegrain telescope is identical for both of two infrared cameras, but the field correction lens and re-imaging lens system are different from each other because of different bands of wavelength. The effective aperture size is 100mm in diameter and the focal ratio is f/5. The total length of the optical system is 300mm and the position of the cold stop is 25mm from the detector focal plane. The RMS spot size is smaller than $40{\mu}m$ over the whole detector plane.
육인수,이성호,진호,선광일,박수종,이대희,남욱원,문봉곤,차상목,한정열,경재만,김건희,양진석,Yuk, I.S.,Lee, S.L.,Jin, H.,Seon, K.I.,Pak, S.,Lee, D.H.,Nam, U.W.,Moon, B.K.,Cha, S.M.,Han, J.Y.,Kyeong, J.M.,Kim, K.H.,Yang, J.S. 한국천문학회 2005 天文學論叢 Vol.20 No.1
KASI (Korea Astronomy and Space Science Institute) is developing the near-infrared camera system named KASINICS (KASI Near-Infrared Camera System) which will be installed at the 60cm f/13.5 Ritchey-Chretien telescope of the Sobaeksan Optical Astronomy Observatory (SOAO). The camera system is optimized for JHKL bands and has a 6 arcmin FOV. The optical system consists of two spherical mirrors and a 8-position filter wheel. With the exception for the dewar window, all optical elements are cooled inside cryogenic dewar. Since the Offner system is adopted to prevent thermal noises from outside of the telescope primary mirror, the secondary mirror of the Offner system acts as a cold Lyot stop. The optical performance does not change by temperature variations because the Aluminum mirrors contract and expand homogeneously with its mount. We finished the design and fabrication of the optical parts and are now aligning the optical system. We plan to have a test observation on 2006 January.