%0 Thesis
%A Klostermann, Tim
%T Entwicklung und Erprobung des Hygrometer for Atmospheric Investigations
%V 113
%@ 1866-1793
%I Universität Wuppertal
%V Dr. (Univ.)
%C Jülich
%M PreJuSER-17038
%@ 978-3-89336-723
%B Schriften des Forschungszentrums Jülich : Energie & Umwelt / Energy & Environment
%P IV, 118 S.
%D 2011
%Z Record converted from JUWEL: 18.07.2013
%Z Universität Wuppertal, Diss., 2011
%X The 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 [...]
%F PUB:(DE-HGF)11 ; PUB:(DE-HGF)3
%9 Dissertation / PhD ThesisBook
%U https://juser.fz-juelich.de/record/17038