Inverse Photoelectron Spectroscopy System - IPES 2000
The OmniVac IPES 2000 System is a highly sensitive surface analysis tool for probing the density of unoccupied electronic states between the Fermi and the vacuum Level, which is not accessible for PES experiments. The IPES 2000 system consists of a solid state UV bandpass photon detector (photocathode and entrance window) with channeltron and preamplifier, mounted on a DN40CF UHV flange and a low energy electron source. The thermionic emission of electrons is achieved from an indirectly heated BaO cathode. The electron beam is characterized by a high beam current and a narrow energy distribution. Electron beam energy, beam current and spot size are independently adjustable over wide ranges. The setup comes with a data acquisition software which controls the kinetic energy of the electrons and provides tools for determination of optimized settings for the channeltron and the preamplifier.
IPES 2000/3000 Detector
|
Detector |
Channeltron with photocathode and entrance window |
|
Photocathode |
NaCl |
|
Window |
SrF2 (alternatively LiF, CaF2) |
|
Mounting flange |
DN 40 CF |
|
Data Acquisition |
Preamplifier and Pulse Counter with USB interface |
|
Data Processing |
Software for Signal Counting |
|
Remote Control |
Electron Gun Energy Control, Puls counting, Channeltron Voltage
(optionally beam deflection) |
|
|
|
IPES 2000 Detector |
Kimball, ELG-2 |
Low Energy Electron Gun System
|
Beam Energy |
1 eV - 200 eV |
|
Beam Current |
1 nA to 20 μA |
|
Spot Size |
0.5 mm to 5 mm at 20 mm working distance |
|
Woorking Distance |
Range: 5 mm to 100 mm, 20 mm recommended |
|
Filament |
BaO |
|
Mounting flange |
DN 40 CF |
|
Power Supply |
All necessary voltages to drive the Electron Gun |
|
Computer / Remote Control |
50 pin D sub and RS‐onnectors |
Angle resolved IPES
Ag (polycr.)
