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An ultrahigh vacuum apparatus for H atom scattering from surfaces.

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Bünermann,  O.
Department of Dynamics at Surfaces, MPI for Biophysical Chemistry, Max Planck Society;

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Jiang,  H.
Department of Dynamics at Surfaces, MPI for Biophysical Chemistry, Max Planck Society;

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Dorenkamp,  Y.
Department of Dynamics at Surfaces, MPI for Biophysical Chemistry, Max Planck Society;

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Auerbach,  D. J.
Department of Dynamics at Surfaces, MPI for Biophysical Chemistry, Max Planck Society;

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Wodtke,  A. M.
Department of Dynamics at Surfaces, MPI for Biophysical Chemistry, Max Planck Society;

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Citation

Bünermann, O., Jiang, H., Dorenkamp, Y., Auerbach, D. J., & Wodtke, A. M. (2018). An ultrahigh vacuum apparatus for H atom scattering from surfaces. Review of Scientific Instruments, 89(9): 094101. doi:10.1063/1.5047674.


Cite as: http://hdl.handle.net/21.11116/0000-0002-5FFF-6
Abstract
We present an apparatus to study inelastic H or D atom scattering from surfaces under ultra-high vacuum conditions. The apparatus provides high resolution information on scattering energy and angular distributions by combining a photolysis-based atom source with Rydberg atom tagging time-of-flight. Using hydrogen halides as precursors, H and D atom beams can be formed with energies from 500 meV up to 7 eV, with an energy spread of down to 2 meV and an intensity of up to 10(8) atoms per pulse. A six-axis manipulator holds the sample and allows variation of both polar and azimuthal incidence angles. Surface temperature can be varied from 45 K up to 1500 K. The apparatus' energy resolution (E/Delta F) can be as high as 1000 and its angular resolution can be adjusted between 0.3 degrees and 3 degrees.