LEED 450
Compact LEED to fit any UHV System
- Large Angle (90°) Fluorescent LEED Display and superior magnetic shielding
- Miniature electron gun with large coherence width double focusing
- Suitable for In Situ Film Growth Monitoring
- Low outgassing rate
- Convenient LEED Image Capture with External CCD Camera
- Simple and Powerful Operation with Digital Controller
The LEED 450 with integral shutter has LEED and AES capabilities using a miniature electron gun, set of concentric grids and a conductive, phosphor coated screen. It is an extremely reliable high-performance LEED instrument which operates with up to date digital power supply. The wide viewing angle (90° at 32 mm sample distance) and minimal shadowing of the screen by the miniature electron gun give a maximum visible LEED pattern.
More Information
Configuration Guide and Specifications
The LEED 450 optics is controlled using either a LPS075-D or LPS300-D power supply. The LPS075-D is used to operate the optic in LEED mode only whereas the LPS300-D in conjunction with the LOA10-AES lock-in controller and AUS30 input coupler is used to operate the optics in LEED and AES modes. Integral shutter (model ISH-45) and LaB6 filament (model LaB6) are further options.
Please contact us for the detailed Configuration and Specification Guide.
Specifications
Fused silica coated with indium-tin oxide conductive layer and P31 phosphor (ZnS:Ag:Cu-green, 525 nm wavelength)
90° angle of acceptance from sample at a distance of 32 mm
Concentric assembly of hemispherical grids
10 mm from sample
Gold coated tungsten wire mesh (100 mesh, 81 % transparency)
0.8 % at low modulation voltages
4.5" standard viewport
External nipple with bellow up to 150 mm retraction from sample
Manual shutter driven by a rotary feedthrough
Mu-metal cylinder with front cover for maximum attenuation
Extreme-high-vacuum compatibility with stainless steel, high alumina and Au-plated copper alloy materials
4.5"(CF63) double sided conflat flange with sample distance 145 mm – 580 mm
Under vacuum, 250 °C maximum
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LEED – 2 µA at 100 eV and 0.5 mm beam size, AES - up to 100 µA at 3 keV
From 1 mm to 250 µm - adjusted by Wehnelt potential, limited by exchangeable aperture down to 50 µm
Tungsten-2 % thoriated filament standard, single crystal LaB6 filament optional
0.45 eV (thoriated - tungsten filament)
10 mm lens diameter and 80 mm length
For full specifications and more information about product options, please do not hesitate to contact your local sales representative.