BDL6-8HR

mini-LEED

Low Energy Electron Diffraction / Auger Electron Spectroscopy

Model BDL450
with Integral Shutter

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

Specifications

Ordering Guide

LEED-AUGER OPTICS (Model BDL450)

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	External 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 sineware oscillator
LOA100	External Lock-in Amplifier

Glass-Display

Fused silica glass coated with indium-tin oxide conductive layer and P31 phosphor ( ZnS:Ag:Cu-green, 525 nm wavelength)

BDL450 .....

90° angle of acceptance from sample at a distance

Retarding Field Analyzer

Concentric assembly of hemispherical grids

BDL450 .....

Working distance from sample 10 mm

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 150 mm 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 145 mm - 580 mm

Bakeability

Under vacuum, 250° C maximum

Integral Miniature Electron Gun

Beam Energy

LEED - 5 eV to 750 eV

AES to 3000 eV

Beam Current

LEED - 2 µA at 100 eV and 0.5 mm beam size

AES - up to 100 µA at 3 keV

Beam Size

from 1 mm to 250 µm - adjusted by Wehnelt voltage

Electron Source

Tungsten-2%Thoriated filament standard

Energy Spread

0.45 eV (thoriated tungsten filament)

Overall Size

10 mm lens diameter and 80 mm length