Development of a wavy Stark velocity filter for studying interstellar chemistry

Cold polar molecules are key to both the understanding of fundamental physics and the characterization of the chemical evolution of interstellar clouds. To facilitate such studies over a wide range of temperatures, we developed a new type of Stark velocity filter for changing the translational and r...

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Bibliographic Details
Published in:Review of scientific instruments 2017-08, Vol.88 (8), p.083106-083106
Main Authors: Okada, Kunihiro, Takada, Yusuke, Kimura, Naoki, Wada, Michiharu, Schuessler, Hans A.
Format: Article
Language:English
Subjects:
Chemical evolution
Curvature
Deflection
Interstellar chemistry
Interstellar matter
Organic chemistry
Rate constants
Scientific apparatus & instruments
Temperature
Temperature dependence
Velocity
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Summary:Cold polar molecules are key to both the understanding of fundamental physics and the characterization of the chemical evolution of interstellar clouds. To facilitate such studies over a wide range of temperatures, we developed a new type of Stark velocity filter for changing the translational and rotational temperatures of velocity-selected polar molecules without changing the output beam position. The translational temperature of guided polar molecules can be significantly varied by exchanging the wavy deflection section with one having a different radius of the curvature and a different deflection angle. Combining in addition a temperature variable gas cell with the wavy Stark velocity filter enables to observe the translational and rotational temperature dependence of the reaction-rate constants of cold ion-polar molecule reactions over the interesting temperature range of 10–100 K.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4997721