Hamburg 2009 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
MO: Fachverband Molekülphysik
MO 13: Molekülphysik Poster 1
MO 13.42: Poster
Dienstag, 3. März 2009, 16:30–19:00, VMP 8 Foyer
Towards spectroscopic analysis of water clusters in a planar multipole ion trap — •Christian Greve1, Michael Kröner2, Sebastian Trippel1, Peter Woias2, Roland Wester1, and Matthias Weidemüller1 — 1Institut für Physik, Universität Freiburg — 2Institut für Mikrosystemtechnik, Universität Freiburg
Charged water clusters especially the protonated water clusters are one of the most extensively studied cluster ions in the gas phase. They play a crucial role in various systems such as in aqueous solutions, in the chemistry of the ionosphere as well as in dense interstellar clouds. Despite numerous efforts, questions concerning the spatial cluster structure and the explanation of the anomalously high proton mobility in aqueous surroundings are not completely solved [1].
To approach these questions we use a supersonic expansion source with pulsed electron bombardement for creating the water clusters which are then loaded into a biplanar multipole chip trap [2]. Analysis after storage is accomplished by time of flight measurements. In cooperation with the University of Bochum we will perform high resolution vibrational predissociation spectroscopy on the stored cluster ions. The presentation will focus on the present stage of the experiment especially on creation and storage properties of the clusters. Moreover we will give an insight into the micro system fabrication technologies involved in the production of the chip trap.
[1] H. Chang et al., Int. Rev. Phys. Chem. 24, 553 (2005)
[2] M. Debatin et al., Phys. Rev. A 77, 033422 (2008)