FemtoLEED DLD L800
Nano-Scale Measurements of Surface Periodic Structures with Femto-Ampere Electron Probe
- Primary electron beam in the range of Femto Ampere
- Electron diffraction on insulating single crystal samples
- Large coherence width
- Powerful operation with digital LEED controller
The Femto-LEED with integral shutter enables nano-scale measurements of surface periodic structures with a femto-ampere electron probe. Instead of a fluorescent screen, it uses a delay line detector and allows for fully digital operation.
With its primary electron beam in the range of Femto Ampere, the FemtoLEED DLD L800 is specifically useful for investigations on sensitive organic samples. The fully digital system negates the need for an external CCD camera for live image capture.
Configuration Guide and Specifications
The FemtoLEED DLD L800 optics is controlled using a LPS075-D power supply with a MCPS02 controller used to operate the microchannel plates. Integral shutter (model ISH-8) and LaB6 filament (model LaB6) are further options.
Please contact us for the detailed Configuration and Specification Guide.
Delay Line Detector with dynamic range 32 bit per channel, 75 microns spatial resolution and active area 145x145 mm
77° angle of acceptance from sample
Concentric assembly of hemispherical grids
15 mm from sample
Gold coated tungsten wire mesh (100 mesh, 81 % transparency)
8" standard viewport
Up to 100 mm retraction from sample; linear ball bearing and acme thread with all spring electr. connections
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
8"(CF150) double sided conflat flange with sample distance 145 mm – 400 mm
Under vacuum, 250 °C maximum
LEED – 2 µA at 100 eV and 0.5 mm beam size
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