Axis
165 X-ray Photoelectron Spectrometer (Kratos Analytical)
Kratos Axis
165 X-ray Photoelectron Spectrometer with ISS and AES
Main Features:
- High energy-resolution
X-ray photoelectron spectroscopy (XPS)
- Dual (Mg and Al)
and Monochromatic (Al) X-ray sources
- Sample processing
chambers (pretreatment and catalysis cell)
- Charge neutralization
- Automated stage
with cooling and heating options
- Angle resolved XPS
- Scanning Auger Electron
Spectroscopy (AES)
- Ion Scattering Spectroscopy
(ISS)
- Ion gun for depth-profiling
and ISS
- Imaging by Scanning
Electron Microscopy (SEM)
Schematic
drawing of the XPS spectrometer illustrates how it works in
spectral mode. For more details you can visit the ULTRA
overview pages provided by the manufacturer.
The rare combination
of X-ray, ion, and electron guns gives us opportunity first to
position the analyzer axis on fine features of the surface using
SEM, and then analyze them with XPS using apertures as small as
30 microns. In addition, the combination of XPS with ISS and AES
helps to complement the advantages of each of the techiques.
Samples and
sample holders: Solid
samples with dimensions less than 10mm x 13 mm x 4mm can be loaded.
Maximum 22 mm diameter is allowed for AXIS-165, upto 2" for
AXIS-ULTRA spectrometer. Several (up to 6-8) standard samples
can be loaded on a single bar. Somewhat thicker samples can be
accomodated on a special spring holder. Special holder stubs/cups
are available for powder samples. Standard bar and stub holders
are shown here. Although the
shape of the sample is not important, flat surfaces yield higher
signal. Conducting samples and substrates are preferred, although
not necessary. Powder samples are analyzed best when pressed in
pellets.
Catalysis
cell : Attached
to the back of the transfer chamber, the cell can be used for
surface reactions. It can be cooled to LN temperature or heated
to 800 degr. in a controlled gas environment. In-situ transfer
of samples from the CatCell to the analysis chamber is available.
Location:
CME 431
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