Berlin 2014 – scientific programme
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MO: Fachverband Molekülphysik
MO 1: Cold Molecules 1
MO 1.3: Talk
Monday, March 17, 2014, 11:15–11:30, BEBEL HS213
Electron gun for diffraction experiments of controlled gas-phase molecules — •Nele L. M. Müller1, Sebastian Trippel1, Terence G. Mullins1, Jens S. Kienitz1,2, Karol Długołecki1, 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
The aim of the presented work is to investigate the structure and dynamics of molecules in the gas-phase. Time-resolved structural information can be gained through various techniques, for example, by electron diffraction experiments. This contribution presents our newly set-up electron gun that will be combined with an existing controlled-molecules apparatus. The gas-phase molecules are prepared in cold, supersonic beams and can be size, isomer, and quantum state selected by means of electric deflection. These samples are then strongly laser aligned by intense picosecond laser pulses and serve as a well-defined sample for electron diffraction experiments. Controlling the molecules' state and spatial orientation increases the amount of information contained in electron diffraction patterns.
The developed electron gun and first experiments will be presented.