Hannover 2016 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 8: Experimental Techniques
MO 8.6: Vortrag
Dienstag, 1. März 2016, 12:15–12:30, f142
A new laser desorption source for controlled molecule imaging — •Nicole Teschmit1, Daniel Horke1, Karol Długołȩcki1, Daniel Gusa1, and Jochen Küpper1,2,3 — 1Center for Free-Electron Laser Science, DESY, Hamburg — 2The Hamburg Center for Ultrafast Imaging, Hamburg — 3Department of Physics, University of Hamburg
Control methodologies for neutral molecules allow for, e.g., the separation of different conformers, the alignment and orientation of molecules in space, and the separation of different quantum states or clusters, by using static and/or dynamic electric fields [1]. Such controlled molecules are ideal targets to gain structural and dynamic information with Coulomb explosion and diffractive imaging measurements [2].
Here, we present a new laser-desorption setup for the production of very cold molecules that will allow for the above mentioned control experiments. Large biological molecules will be vaporized and, subsequently, cooled by entrainment in supersonic noble gas beams. We present characterisation measurements of the created molecular beam and a quantitative comparison to other vaporisation methods such as laser induced acoustic desorption and thermal vaporisation.
[1] Y.-P. Chang et al, Int. Rev. Phys. Chem. 34, 557 (2015)
[2] J. Küpper et al, Phys. Rev. Lett. 112, 083002 (2014)