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mini-LEED with Integral Shutter: Model BDL450
mini-LEED with Integral Shutter: Model BDL450

mini-LEED with Integral Shutter

Model BDL450

  • Low Energy Electron Diffraction / Auger Electron Spectroscopy
  • Miniature Back-Display LEED-AES Spectrometer Featuring Easy Fitting to Complex UHV Systems


  • Large Angle (90°) Fluorescent LEED Display
  • Mounting Flange: 4.5" O.D. (Cf63)
  • Auger Electron Spectroscopy as a Secondary Technique
  • Suitable For In Situ Film Growth Monitoring
  • Integral Shutter
  • External Linear Retraction
  • Convenient LEED Image Capture with External CCD Camera
  • Simple and Powerful Operation with Digital Controller

Brochure Download (PDF):

Download the Model BDL450 Brochure (PDF)


Leed-Auger Optics (Model BDL450)

  • Glass-Display: Fused silica glass coated with indium-tin oxide conductive layer and P31 phosphor ( ZnS:Ag:Cu-green, 525nm wavelength)
  • BDL450 .....: 90° angle of acceptance from sample at a distance
  • Retarding Field Analyzer: Concentric assembly of hemispherical grids
  • BDL450 .....: Working distance from sample 10mm
  • Grid Material .....: Gold coated tungsten wire mesh (100 mesh, 81% transparency)
  • Energy Resolution .....: 0.8% at low modulation voltage
  • Monitoring: 4.5" (CF63) standard viewport
  • Linear Motion: External nipple with bellow up to 150mm retraction
  • Integral Shutter: Open and close at any position of the linear motion
  • Magnetic Shielding: Mu-metal cylinder with front cover for maximum
  • Assembly: Extreme-high-vacuum compatibility with stainless steel, high alumina and Au-plated copper alloy materials
  • Mounting: 4.5" (CF63) double sided conflat flange with sample distance 145mm - 580mm
  • Bakeability: Under vacuum, 250°C maximum

Integral Miniature Electron Gun

  • Beam Energy:
    • LEED - 5eV to 750eV
    • AES to 3000eV
  • Beam Current:
    • LEED - 2µA at 100eV and 0.5mm beam size
    • AES - up to 100µA at 3keV
  • Beam Size: from 1mm to 250µm - adjusted by Wehnelt voltage
  • Electron Source: Tungsten-2% Thoriated filament standard
  • Energy Spread: 0.45eV (thoriated tungsten filament)
  • Overall Size: 10mm lens diameter and 80mm length


Download BDL450 v4 schematics in PDF format.

Ordering Guide:

  • BDL450-CP: Complete LEED-Auger package with 4.5" flange( incl. LMX, ISH, V450, LPS300, LOA10-AES, LIM08)
  • BDL450: LEED optics with integral electron gun on 4.5" flange (Specify 2 or 3 grid)
  • LMX-EXT: xternal linear motion( nipple-below) (X=retraction distance)
  • ISH: Integral shutter
  • V450: 4.5" (CF63) viewport
  • LPS075: Power supply with voltage range 0 - 750V
  • LPS300: Power supply with voltage range 0 - 3kV
  • AES-Ser: AES software for external Lock-in Ampl.
  • LIM08: LEED imaging software with CCD camera, full version
  • LIM08B: LEED imaging software with CCD camera, basic version
  • LOA10-AES: Digital AES controller with ramp voltage, sinewave oscillator, lock-in and AES software
  • RVO: Ramp Voltage and sinewave oscillator
  • LOA100: External Lock-in Amplifier