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Absorption of methane by water clusters generated in helium nano droplets / Author: Erik Barwa
AuthorBarwa, Erik
Thesis advisorScheier, Paul
PublishedInnsbruck, March 2016
DescriptionIV, 45 Blätter : Illustrationen, Diagramme
Institutional NoteUniversität Innsbruck, Masterarbeit, 2016
Date of SubmissionApril 2016
Document typeMaster Thesis
Keywords (DE)Cluster / Heliumcluster / nanodroplets / Methan / Methanhydrtat / Methanklathrat / Schweres Wasser / Vakuumsicherheit
Keywords (EN)Helium / nano droplets / methane / clatrate / hydrate / heavy water cluster / Vacuum security
Keywords (GND)Clusterphysik / Methanhydrate / Helium-Nanotropfen-Isolationsspektroskopie / Deuteriumoxid / Vakuum
URNurn:nbn:at:at-ubi:1-4037 Persistent Identifier (URN)
 The work is publicly available
Absorption of methane by water clusters generated in helium nano droplets [4.2 mb]
Abstract (English)

Helium nano droplets feature an unique environment for aggregation of picked up species into clusters, which makes them a multifunctional tool in cluster physics.

In this thesis the formation of methane clathrates in helium nano droplets is presented. Therefore methane and heavy water is picked up by a cold flow of helium clusters, produced by supersonic jet expansion below 20 K. After ionization of the dopant with an Nier-type ionizer, the clusters are subsequently mass analyzed by a time of flight mass spectrometer. The data is evaluated with a new software, which is developed by members of our workgroup.

Furthermore the installation of a vacuum security to the CLUSTof experiment is described. The aim of this vacuum security, is to prevent oil, originating from the rotary vane pumps, to contaminate the vacuum chambers and thereby producing a lot of dirt peaks in the mass spectra, in case of a power break down.