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오세지 1 , 김우수 1 , 김지은 1 , 나고운 1 , 남신우 1 , 박재형 1 , 박일흥 1 , 양종만 1 ,

Research Center of MEMS Space Telescope. The Spectrophotometer in Small MEMS Space Telescope For Observation of Extreme Lightning Phenomena. 오세지 1 , 김우수 1 , 김지은 1 , 나고운 1 , 남신우 1 , 박재형 1 , 박일흥 1 , 양종만 1 , 이직 1 , 전진아 1 , 정애라 1 , 정수민 1 , 정태신 1 , Sayyora Artikova 1 ,

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오세지 1 , 김우수 1 , 김지은 1 , 나고운 1 , 남신우 1 , 박재형 1 , 박일흥 1 , 양종만 1 ,

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  1. Research Center of MEMS Space Telescope The Spectrophotometer in Small MEMS Space Telescope For Observation of Extreme Lightning Phenomena 오세지1, 김우수1, 김지은1, 나고운1, 남신우1, 박재형1, 박일흥1, 양종만1, 이직1, 전진아1, 정애라1, 정수민1, 정태신1, Sayyora Artikova1, 김민수2, 김용권2 , 박용선2, 유형준2, 유병욱2, 진주영2, B. Khrenov3, G. Garpov3, M. Panasyuk3, P. Klimov3 1 이화여대, 2서울대, 3모스크바대학

  2. Contents • Purpose of our experiment • Introduction to TLEs • Spectra of Sprites • The Small MEMS Space Telescope • The Spectrophotometer • Summary 2/11 Seji Oh 2007 KPS Fall

  3. Purpose of our experiment 3/11 Seji Oh 2007 KPS Fall

  4. Introduction to TLEs (Transient Luminous Events) Distance (km) 100 • ※ Reference: • Victor P. Pasko, Electric jets, NATURE VOL. 423, pp.927-929, 26 JUNE 2003 • Matthew James Heavner, A Thesis, pp. 79-98, May 2003 4/11 Seji Oh 2007 KPS Fall

  5. Spectra of Sprites in Blue and Red emission Blue spectrum of July 28, 1998 Sprite from EXL 98 aircraft Red spectrum of 24 July, 1996 Sprite from WIRO ※ It was captured using an intensified CCD system. ⇒ We measure the temporal energy distribution of TLEs. • ※ Reference: • Matthew James Heavner, A Thesis, pp. 79-98, May 2003 • E. Bucsela et al., Journal of Atmospheric and Solar-Terrestrial Physics 65 (2003) 583–590 5/11 Seji Oh 2007 KPS Fall

  6. Introduction to Small MEMS Space Telescope MAPMT Trigger Micromirror Zoom-in Micromirror Spectrophotometer NIR CCD Camera Drawn by Gowoon Na @Ewha 6/11 Seji Oh 2007 KPS Fall

  7. Introduction to Spectrophotometer 7/11 Seji Oh 2007 KPS Fall

  8. Principle of the Spectrophotometer • Field Of View: ±10° • Each filter has same FOV. • Each filter occupies 4 pixels of PMT. • Mirror dimension: 70 × 65 mm2 • Temporal resolution: 10 μs 8/11 Seji Oh 2007 KPS Fall

  9. Components Filter - 4.3(W)×5.3(L)×5.5(H) mm3 Photon Detector 64 Channels MAPMT We choose the 8 filters by Sprites spectrum. (slides #5) The index of refraction = 1.5 Typical Spectral Response 9/11 Seji Oh 2007 KPS Fall

  10. Assembled Spectrophotometer Square mirror with support structure 64 Channels MAPMT Readout Board Beam guide with 8 wide band filters 10/11 Seji Oh 2007 KPS Fall

  11. Summary • We have developed the spectrophotometer with 8 wide band filters (300 ~ 850 nm) to measure the spectrum of TLEs. • Plan in 2008 • KAMTEL: Korean Astronaut Mission • MTEL: Russian Satellite Project 11/11 Seji Oh 2007 KPS Fall

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