Low-energy Electron Diffraction - Experimental Setup

Experimental Setup

In order to keep the sample clean and free from unwanted adsorbates, LEED experiments are performed in an ultra-high-vacuum environment mbar).

The most important elements in an LEED experiment are

  1. A sample holder with the prepared sample
  2. An electron gun
  3. A display system, usually a hemispherical fluorescent screen on which the diffraction pattern can be observed directly
  4. A sputtering gun for cleaning the surface
  5. An Auger-Electron Spectroscopy system in order to determine the purity of the surface.

A simplified sketch of an LEED setup is shown in figure 2.

Read more about this topic:  Low-energy Electron Diffraction

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