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EXPERIMENTAL APPARATUS


Ultrahigh-vacuum device Varian 240 LEED/Auger

Research techniques:

• Auger electron spectroscopy
• low-energy electron diffraction

Basic elements:

• electron gun
• four-grid retarding field spherical analyzer
• cylinder mirror analyzer
• ion gun, manipulator
• videopositioner of a sample
• vacuum system.

Technical parameters:

Pressure of residual gases in the chamber: 5×10^-8 Pà
Primary electron beam diameter: 25 mkm.
Primary electron energy: 3 êeV (four-grid retarding field spherical analyzer)
5 êeV (cylinder mirror analyzer)
Primary electron current: 100 mkÀ (four-grid retarding field spherical analyzer))
10 mkÀ (cylinder mirror analyzer)
Energy resolution: 0,5%
Ion energy: (0,6–5) keV
Ion current density 5 mkA/ñm²