서지주요정보
$CO_2$ 레이저를 이용한 대기중 미량 분자의 흡수계수와 원격 농도 측정에 관한 연구 = Absorption coefficients measurement and remote sensing of atmospheric rare molecules using $CO_2$ laser
서명 / 저자 $CO_2$ 레이저를 이용한 대기중 미량 분자의 흡수계수와 원격 농도 측정에 관한 연구 = Absorption coefficients measurement and remote sensing of atmospheric rare molecules using $CO_2$ laser / 신윤섭.
저자명 신윤섭 ; Shin, Yun-Sup
발행사항 [대전 : 한국과학기술원, 1995].
Online Access 제한공개(로그인 후 원문보기 가능)원문

소장정보

등록번호

8005100

소장위치/청구기호

학술문화관(문화관) 보존서고

MPH 95013

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

LIDAR(LIght Detection And Ranging) technology is very useful for remote sensing of pollutants in the air. To detect rare molecules in the air, it is important to know the accurate absorption coefficients of those molecules. Measurements of Ethylene($C_2H_4$) and Ammonia($NH_3$) absorption coefficients in the IR(10 ㎛) region were done by using a tunable $CO_2$ laser and pyroelectric detectors. With the results of this experiment, the concentrations of Ethylene and Ammonia were detected by using RR(Retro-Reflector) DIAL(DIfferential Absorption Lidar) system with two $CO_2$ lasers. The cell used for absorption coefficient measurement is made with a Quartz tube 1 m long. The volume of a mixing chamber is about 4 ℓ. $N_2$ gas was used for purzing. Almost the results of this experiment had good agreements with the values of HITRAN database(e.x.: 10P(14) line for Ethylene case, $32.00 atm^{-1}cm^{-1}$ from the database, $30.66 atm^{-1}cm^{-1}$ from the experimental result), but 10R(08) line data for Ammonia did not. Because 10R(08) line was used for on-line, which had large absorption coefficient, this experimental result(not the database value) was used in the field experiment. For the field experiment, the detecting range between the lasers and a reflector is 345 m. The measured Ethylene and Ammonia densities were 119 ppb and 6.7 ppb respectively, which were resonable results. The limitation of detection, i.e. the standard deviation, of this experiment was about 20 ppb for both molecules. To get more accurate results, more stable laser system is necessary.

서지기타정보

서지기타정보
청구기호 {MPH 95013
형태사항 i, 68 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Yun-Sup Shin
지도교수의 한글표기 : 공홍진
지도교수의 영문표기 : Hong-Jin Kong
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 63-68
주제 Mass attenuation coefficients.
Remote sensing.
탄산 가스 레이저. --과학기술용어시소러스
흡수 계수. --과학기술용어시소러스
농도 측정. --과학기술용어시소러스
원격 측정. --과학기술용어시소러스
Carbon dioxide lasers.
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