Table of Contents
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Source slit
The Source slit is located immediately after the First Field-Free Region Gas
Cell. This slit defines the width of the beam in the Y plane; as the width is
reduced, the beam becomes narrower, increasing the maximum attainable
resolution, but the sensitivity is reduced. This slit is controlled by Source Slit
on the Tune window's Control 1 tab.
Y Deflect 1 lens
The Y Deflect 1 lens is after the Source Slit and is used to deflect the ion beam
through the Alpha Slit and Y-Focus lens. It is controlled by Y Deflect 1 on the
Tune window's Lenses 1 tab.
Alpha slit
The Alpha slit is located between the source slit and Y Focus lens. It is used
for restricting the angular divergence of the ion beam, mainly during high
resolution operation. It is controlled by Alpha Slit on the Tune window's
Control 2 tab.
Y Focus lens
The Y Focus lens is mounted before the first ESA assembly. This lens is
adjusted according to the magnet field to maintain constant mass resolution
over the full mass range. It is controlled by Y Focus on the Tune window's
Lenses 2 tab.
First ESA assembly (ESA 1)
The First ESA assembly focuses ions of selected energy before they enter the
magnetic sector. By selecting a voltage proportional to the accelerating
voltage, ions formed in the source are transmitted through the magnet for
mass analysis. If the voltage is adjusted, product ions of fragmentation
occurring in the First Field-Free Region can be transmitted instead, which is
the basis of Linked Scanning techniques.
Z Focus 2 lens assembly
The Z Focus 2 lens assembly is mounted in the analyzer housing at the flight
tube aperture.
AutoSpec functionality
G-5
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Table of Contents
Troubleshooting
