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The AX800 Standard Analyser |
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The quadrupole
analyser is available
with a choice of ion sources, Mass filters and detection systems.
The
Ion Source.
The standard ion
source is a radial symmetrical design with twin filaments. The semi-open
construction makes it suitable for most applications. Thoria coated
filaments to minimize out gassing are available as an option.
The
Mass Filter.
The
standard mass filter is a 125mm long single filter with 6mm
diameter cylindrical rods. A Triple filter version is available (See
Modular Analyser below)
The
Detector.
Choices
of either Faraday only or dual Faraday/multiplier detectors are available.
The
Mounting Flange.
Normally
CF63 or ISO63 flange is fitted. The quadrupole assembly can be mounted
on larger flanges if required.
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The AX800 Modular Analyser
(Option) |
| Analysis
of low volatile samples and condensable vapours may result in
contamination of the analyser. This Analyser had been developed for
quick removal and replacement of both the ion source and mass
filter greatly simplifying cleaning and maintenance. If a spare
ion source and mass filter are available then this simple procedure greatly reduces down time of the quadrupole system.
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The
Ion Source.
The Ion Source
simply plugs into the top of the mass filter housing without
the need to make electrical connections and
therefore can be quickly changed.
The standard ion
source is a radial symmetrical design with twin filaments.
The
Ion Source illustrated above is fitted with an axial gas inlet probe,
twin filaments, source heater and temperature sensor. A radial aperture
is provided for molecular beams, or
use of solids probe. The semi-open
construction makes it suitable for most applications. Thoria coated
filaments to minimize out gassing are available as an option.
Refer
to the options page for additional Ion sources that are available.
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The
Mass Filter.
The
mass filter plugs in to the housing without the need to make electrical
connections and therefore can also be quickly changed. This is particularly
useful for the triple filter version . The
standard mass filter is a 150 mm long single filter with 6mm
diameter cylindrical rods. A Triple filter version is available.
The
Detector.
Choices
of either Faraday only or dual Faraday/multiplier detectors are available.
The electron multiplier can be either Channeltron or discreet dynode
type for continuous high output current monitoring.
The
Mounting Flange.
Normally
CF63 or ISO63 flange is fitted. The quadrupole assembly can be mounted
on larger flanges if required.
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The RF Head
This compact unit contains the
pre-amplifier and RF generation/control circuitry and plugs directly
onto the analyzer to prevent signal degradation. Choices of
operating frequencies are available to give the best possible
performance over the required mass range. The standard cable length is 2
metres but longer cables can be supplied if
required.
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The Control Unit.
The Control unit contains all the main
power supplies for the instrument including the emission and filament
control circuits and the Computer Interface Card that are housed in a 2U high 19inch rack module.
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Residual
gas Analysers 
