Bachelor Thesis

PUBDB-2014-04235

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Characterizing Laser Induced Desorption of Large Molecules

Frisch, W. (Corresponding Author)CFEL*DESY*

2014

Abstract: In this thesis the implementation of a new laser based desorption method for large molecules was investigated. This volatilisation method was laser induced acoustic desorption, which promises a soft desorption of neutral molecules from a foil surface due to the irradiation of the back side with a laser. The setup for the experiments including vacuum chamber, laser paths and special parts were designed and build. Different sample depositionmethods of Phenylalanine on the foils were tested. The desorbed molecules then were ionised by a femtosecond laser and the resulting ions were detected and identified with a linear time of flight mass spectrometer. The ion yield was characterised in dependence of different parameters like laser power and time delay between desorption and ionisation laser pulses as well as different foil materials.

Keyword(s): Unveröffentlichte Hochschulschrift

Note: OA
Note: University of Hamburg, Bachelorarbeit, 2014

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Contributing Institute(s):

1. CFEL-Coherent X-Ray Imaging (FS-CFEL-1)
2. CFEL-CMI (FS-CFEL-CMI)

Research Program(s):

1. Experiments at CFEL (POF2-544) (POF2-544)

Experiment(s):

1. Experiments at CFEL

Appears in the scientific report 2014

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