OCI Vacuum Microengineering

Digital LEED-AES Controllers

Precise, Convenient and Reliable
on-board microprocessor control
for Low Energy Electron Diffraction (LEED)
and Auger Electron Spectroscopy

Model LPS075-D

Compact controller for LEED application compatible
with BDL800/600/450 and most commercial LEED optics

Model LPS300-D & LOA10-AES

Complete electronics for LEED and AES
with data acquisition and analysis software

 
Specifications Ordering Guide

Model LPS075-D and LPS300-D

LPS075-D LEED controller with beam voltage range 0- 750 V
LPS300-D

LEED-AES controller with voltage range 0-3000 V

LPS300-D-AES

LEED-AES controller with voltage range 0- 3000 V and built -in AES board with ramp voltage and modulator (require external lock-in amplifier)

LOA10-AES AES controller with pre-amplifier and AES software for Windows 98/2000/XP
AES-Ser AES software for external Lock-in Ampl
LOA100 External Lock-in Amplifier
LPS-USB

LPS software to control LPS075-D and LPS300-D from PC computer

Analog Outputs:

 
Beam Voltage

negative, 0-750V for LPS075-D
negative, 0-3000V for LPS300-D

Filament Current 0-3.5 A
Wehnelt Voltage

0-60V with respect to filament

Focus Voltage (LEED) positive , factor 0.7 - 1.8 of beam voltage
Focus Voltage (AES) negative, 0-3000V
Retarding Voltage negative, 0.5-1.1 of beam voltage
Screen Voltage positive, 0-5kV
Monitoring all above voltages
Emission Current 1-200 µA range
Beam Current 0.01- 200 µA range
Display

vacuum fluorescent display for all voltages, beam current, emission current and program functions

Manual Control

manual control of all voltages via rotary dials and selection switches, manual programming available

On-Board Automation

5 pre-programed operating programs, outgassing, Stand-by, filament forming, beam voltage scanning, constant beam current, diagnostics programs

PC Control

full control of all functions of the controller or beam voltage via USB interface, PC software r equired

Protection over-voltage, over-current and short circuit protection
Model LOA10-AES
Ramp Generator

0-2000 V with precision sine wave modulation

Modulator: 0.5-20 Vpk-pk ampl., 1.47 kHz frequency
Lock-in amplifier: sensitivity factors: 10, 100, 1000, and 1,2,4,8;
time constant: 0.1, 0.5, 1, 3 sec.; harmonics:
fundamental and 2nd, phase: 0-360 deg.

PC control: all function are controlled by AES software via RS232 interface or USB ( no manual control)
Pre-amplifier: separate pre-amplifier with gain 500, band-pass filter and bias voltage input