OCI BDL800IR, Instruction Manual

Page: 17 / 61

Chapter 4 Electronics 17
using a PC.
GND Separate ground terminal.
Fuse
2 A slow blow fuse rated for 100–120 V, or
1.5 A slow blow fuse rated for 220–240 V.
AC In AC input power 3-pole socket.
Screen BNC connector, maximum 5 kV DC.
LEED/AES Output
12-pin connector for the electron gun cable.
Configuration of the pins partially differs be-
tween LEED and AES modes.
4.1.3 Electron Gun Pins Assignment
LEED Mode AES Mode
A Filament A Filament
B Filament B Filament
C Wehnelt C Wehnelt
D Common D Focus
F Focus F Common / Resistor Bias
G Common G Common
M Ground (Cable shielding) M Ground (Cable shielding)
J Grid 2&3
4.2 LOA10-AES
Model LOA10-AES is a dedicated controller allowing the INTEGRALEED optics perform-
ing Auger Electron Spectroscopy using Retarding Field Analyzer. This unit can also be used
in conjunction with other types of analyzers, such as Cylindrical Mass Analyzer. The unit
consists of a high voltage ramp, a precision sine wave generator, a lock-in amplifier, and a
low noise input coupler with a preamplifier.
All functions of this unit are controlled remotely by our AES software via the USB.
The high voltage ramp supplies a sine wave modulated output signal. The unit comprises
a precision sine wave oscillator with a maximum V
pp
of 20 V. Its frequency can adjusted in
the range of ±5% by a trimmer located on the front panel.