Glass-type hydrogen and deuterium absorption cells developed for D/H ratio measurements in the Martian atmosphere.

Glass-type hydrogen and deuterium absorption cells developed for D/H ratio measurements in the Martian atmosphere. Research Abstract Details 

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Glass-type hydrogen and deuterium absorption cells developed for D/H ratio measurements in the Martian atmosphere. Abstract Text:

T D Kawahara,S Okano,T Abe,H Fukunishi,K Ito,

Hydrogen and deuterium absorption cells of a new glass type have been developed for the D/H ratio measurements on the Japanese Mars mission PLANET-B. The H/D cells work as narrow-band rejection filters for the H/D Lyman-alpha line, respectively, when the H or D atoms are produced at a heated filament inside the cells. The absorption profiles of the cells were successfully measured with a high-resolution vacuum ultraviolet spectrometer with a wavelength resolution of 6.6 x 10(-4) nm. The derived optical thickness was found to be ~7 and ~14 for the hydrogen and deuterium cells, respectively. It was also found that the derived temperature of atomic gas ranges between the temperature of the cell wall and that of the heated filament, and it increases with increasing filament temperature. The measured profiles showed that the absorption efficiencies of the developed absorption cells are sufficient to observe the D/H ratios of the Martian atmosphere.

Glass-type hydrogen and deuterium absorption cells developed for D/H ratio measurements in the Martian atmosphere. Publishing Authors By Initials

TD Kawahara,S Okano,T Abe,H Fukunishi,K Ito,

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Glass-type hydrogen and deuterium absorption cells developed for D/H ratio measurements in the Martian atmosphere. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Applied optics

VOLUME: 36

Page Numbers: 2229-37

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ISSN: 0003-6935

DAY: 1

MONTH: Apr

YEAR: 1997

Glass-type hydrogen and deuterium absorption cells developed for D/H ratio measurements in the Martian atmosphere. Information

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LANGUAGE: eng

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Country: United States

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MEDLINETA: Appl Opt

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