کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1781171 | 1523944 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Planetary laser spectrometer for sensitive in situ detection of water at 1881Â nm
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فیزیک زمین (ژئو فیزیک)
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چکیده انگلیسی
We describe the design and capabilities of a highly sensitive prototype tunable diode laser spectrometer for detecting water vapor and its isotopologues in the 1881Â nm region. It is a compact instrument based on wavelength modulated cavity enhanced absorption spectroscopy and can measure a fractional optical absorption of ~10â5 for a pathlength of ~4Â km, corresponding to ~10â8Â mbar of water vapor (improvable to 10â9Â mbar). The spectrometer would be suitable for searching for fingerprints of ancient climates on Mars and potential habitats of life in the Solar system. It would be useful for appraising water deposits on the Moon and asteroids, and characterizing the isotopic composition. Lunar deployment could provide ground truth to the recent orbital measurements, and help to discover records of the early bombardment history of the inner Solar system buried at the poles and clarify the mechanism for the generation of water in the illuminated regions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Planetary and Space Science - Volume 92, March 2014, Pages 127-135
Journal: Planetary and Space Science - Volume 92, March 2014, Pages 127-135
نویسندگان
R. Vasudev, K. Mansour, C.R. Webster,