ocivm.com > LEED / AES Spectrometers > LEED 600 MCP (Model BDL600IR-MCP)
Figure 2. Model LPS075-D power supply for LEED operation. 
Figure 3. Model LPS300-D and LOA10-AES power supply for LEED and AES operation. 
Figure 4. Model MCPS01/02 power supply for microchannel plate operation. 
Figure 5. MultiLEED Software. 
Figure 6. AES Software. 
Figure 7. AES Software Images - element composition. 
Figure 8. LEED pattern of Silicon (111) with 80 eV beam energy. 
Figure 9. Auger spectrum of Silicon (111). 
The LEED 600 MCP combines cutting-edge Low-Energy Electron Diffraction (LEED) and Auger Electron Spectroscopy (AES) capabilities. Featuring a miniature electron gun, a set of concentric grids, and a conductive, phosphor-coated screen, and the superior signal amplification of single or dual microchannel plates (MCPs). The MCPs provide a high gain enabling the use of ultra-low beam currents to produce clear, high-resolution LEED patterns while minimizing sample damage—ideal for delicate materials like ice and organics.
Designed for ease of use, the LEED 600 MCP operates with a modern digital power supplies and a robust retraction mechanism, ensuring smooth, dependable day-to-day operation, as trusted by our extensive user base for decades. The wide viewing angle (71 ° at 49 mm sample distance) and minimal screen shadowing by the electron gun maximize the visible LEED pattern, providing unparalleled clarity and precision for surface science research.
The LEED 600 MCP is especially good at providing LEED and AES data of organic samples. The compact size allows for easy installation to smaller UHV systems and the gain from the MCPs allows for better focusing of LEED imaging.
For seamless integration, 3D step files are available for most models on the PDF Downloads page.
LEED 600 MCP (Model BDL600IR-MCP) calculation formula for Flange-Sample distance & Retraction length:
FS = 150.5mm + 2 LMX – OV; where FS is the flange to sample distance, LMX is the retraction length and OV is the overlapping length.
Please detailed specifications, download LEED 600 MCP Configuration and Specifications (.pdf).
| Optics | |
|---|---|
| Glass-display | Fused silica coated with indium-tin oxide conductive layer and P31 phosphor (ZnS:Ag:Cu-green, 525 nm wavelength) |
| Acceptance angle | 71 ° angle of acceptance from sample at a distance of 49 mm |
| Retarding Field Analyser | Concentric assembly of hemispherical grids |
| Working distance | 15 mm from sample |
| Grid material | Gold coated stainless steel mesh (100 mesh, 81% transparency) |
| Energy Resolution | 0.2% - 0.5% at low modulation voltages |
| Monitoring | CF6" standard viewport |
| Linear motion | up to 100mm retraction from sample; linear ball bearing and acme thread with all spring electr. connections |
| Magnetic shielding | Mu-metal cylinder with front cover for maximum attenuation |
| Assembly | Extreme-high-vacuum compatibility with stainless steel, high alumina and Au-plated copper alloy materials |
| Mounting | CF6" (DN100CF) double sided conflat flange with sample distance 145 mm – 400 mm |
| Bakeability | Under vacuum, 250 °C maximum |
| Integral Miniature Electron Gun | |
| Beam energy system | LEED – 5 eV to 750 eV, AES – 5 eV to 3000 eV |
| Beam current | LEED – 2 µA at 100 eV and 0.5mm beam size, AES - up to 100 µA at 3 keV |
| Beam size | from 1 mm to 250 µm - adjusted by Wehnelt potential, limited by exchangeable aperture down to 50 µm |
| Electron source | Tungsten-2% thoriated filament standard, single crystal LaB6 filament optional |
| Energy spread | 0.45 eV (thoriated - tungsten filament) |
| Overall size | 10 mm lens diameter and 80 mm length |
| Integral Miniature Electron Gun | |
| Beam energy system | LEED – 5 eV to 750 eV, AES – 5 eV to 3000 eV |
| Beam current | LEED – 2 µA at 100 eV and 0.5mm beam size, AES - up to 100 µA at 3 keV |
| Beam size | from 1 mm to 250 µm - adjusted by Wehnelt potential, limited by exchangeable aperture down to 50 µm |
| Electron source | Tungsten-2% thoriated filament standard, single crystal LaB6 filament optional |
| Energy spread | 0.45 eV (thoriated - tungsten filament) |
| Overall size | 10 mm lens diameter and 80mm length |
The LEED 600 MCP 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. LaB6 filament (Model LaB6) is an option.
For more information, download LEED 600 MCP Configuration and Specifications (.pdf).