FemtoLEED DLD L1000
Ultra-Sensitive and Insulating Film Crystallography
- Fully digital
- Minimised blind area
- Electron diffraction on insulating single crystal samples
- Large coherence width
- Powerful operation with digital LEED controller
The LEED DLD L1000 with integral shutter enables measurements of ultra-sensitive and insulating films. Instead of a fluorescent screen, it uses a delay line detector which allows for fully digital operation. The hex-anode provides minimised blind area due to the redundant detection opportunities of the added third delay line layer.
The LEED DLD L1000 is specifically useful for investigations on ultra-sensitive and insulating films. The fully digital system negates the need for an external CCD camera for live image capture.
Configuration and Specification Guide
The LEED DLD L1000 optics is controlled using a LPS075-D power supply with a MCPS02 controller used to operate the microchannel plates. In addition to the LPS075-D and MCPS02 controllers the DLA-TR8 controller from Roentdek is needed for operation of the hexDLD-anode. Integral shutter (model ISH) and LaB6 filament (model LaB6) are further options.
Delay Line Detector with dynamic range 32 bit per channel, 75 microns spatial resolution and active area diameter 75 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)
10" standard viewport
External nipple with bellow up to 150 mm retraction
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
10"(CF200) double sided conflat flange with sample distance 145 mm – 580 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
107, operating in pulsed mode
For full specifications and more information about product options, please do not hesitate to contact your local sales representative.