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A new Stark decelerator based surface scattering instrument for studying energy transfer at the gas-surface interface

MPS-Authors

Engelhart,  Dan P.
Department of Dynamics and Surfaces, MPI for biophysical chemistry, Max Planck Society;
Institute for Physical Chemistry, Georg-August University of Göttingen;

Grätz,  Fabian
Institute for Physical Chemistry, Georg-August University of Göttingen;
Department of Dynamics at Surfaces, MPI for Biophysical Chemistry, Max Planck Society;

Wagner,  Roman
Institute for Physical Chemistry, Georg-August University of Göttingen;
Department of Dynamics at Surfaces, MPI for Biophysical Chemistry, Max Planck Society;

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Haak,  Henrik
Molecular Physics, Fritz Haber Institute, Max Planck Society;

Wodtke,  Alec
Institute for Physical Chemistry, Georg-August University of Göttingen;
Department of Dynamics at Surfaces, MPI for biophysical chemistry, Max Planck Society;

Schäfer,  T.
Institute for Physical Chemistry, Georg-August University of Göttingen;
Department of Dynamics at Surfaces, MPI for biophysical chemistry, Max Planck Society;

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Citation

Engelhart, D. P., Grätz, F., Wagner, R., Haak, H., Meijer, G., Wodtke, A., et al. (2015). A new Stark decelerator based surface scattering instrument for studying energy transfer at the gas-surface interface. Review of Scientific Instruments, 86(4): 043306. doi:10.1063/1.4918797.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0026-CCD0-9
Abstract
We report on the design and characterization of a new apparatus for performing quantum-state resolved surface scattering experiments. The apparatus combines optical state-specific molecule preparation with a compact hexapole and a Stark decelerator to prepare carrier gas-free pulses of quantum-state pure CO molecules with velocities controllable between 33 and 1000 m/s with extremely narrow velocity distributions. The ultrahigh vacuum surface scattering chamber includes homebuilt ion and electron detectors, a closed-cycle helium cooled single crystal sample mount capable of tuning surface temperature between 19 and 1337 K, a Kelvin probe for non-destructive work function measurements, a precision leak valve manifold for targeted adsorbate deposition, an inexpensive quadrupole mass spectrometer modified to perform high resolution temperature programmed desorption experiments and facilities to clean and characterize the surface.