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000017038 1001_ $$0P:(DE-Juel1)129129$$aKlostermann, Tim$$b0$$eCorresponding author$$gmale$$uFZJ
000017038 245__ $$aEntwicklung und Erprobung des Hygrometer for Atmospheric Investigations
000017038 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2011
000017038 300__ $$aIV, 118 S.
000017038 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis
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000017038 4900_ $$0PERI:(DE-600)2445288-9$$aSchriften des Forschungszentrums Jülich : Energie & Umwelt / Energy & Environment$$v113$$x1866-1793
000017038 502__ $$aUniversität Wuppertal, Diss., 2011$$bDr. (Univ.)$$cUniversität Wuppertal$$d2011
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000017038 520__ $$aThe purposse of this thesis is the development and proving of a high precision in-situ hygrometer for the research airplane $\textbf{HALO}$ which uses the Tunable Diode Laser Absorption Spectroscopy. To provide tropospheric and stratospheric measurements between $\textbf{2 ppmv}$ and $\textbf{10000 ppmv}$ two different lasers are implemented: One for high mixing ratios up to $\textbf{10000 ppmv}$ in the  $\textbf{1,4 $\mu$ m}$ absorption band of the wate molecule and one for low mixingratios between $\textbf{2 ppmv}$ and $\textbf{400 ppmv}$ in the $\textbf{2,6 $\mu$m}$ ground vibrational band. For noncontact measurements of gas phase water an open path cell with two absorption paths has been developed. In contrast to the common Herriott setup of a cell with multiple absorption paths this cell has been designed as a White cell to include a direct fiber coupling. By using a computational based optimization for the optical absorption pths the disruptive interfering effects could be reduced below a level of $\textbf{266 ppmv}$ which is given by the used lasers. Due to the technical difficulties by [...]
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