Isoprime User’s Guide
Version 1.02 IsoPrime100 User’s Guide Page 28 of 219
COLLECTORS
TRIPLE COLLECTOR
The IsoPrime100 universal collector system is shown below. The universal collector comprises
three Faraday cups, each with a different width of resolving slit. This system accommodates the
variations in the ion beam separations of different gases, such as CO2 and N2, without the need
for moveable collector assemblies. In the case of hydrogen an extra collector is added to the
assembly.
Universal Triple Collector
The narrowest slit accepts the ion beam from the minor 1 isotope (beam 2) and is referred to as
the axial collector. This slit provides the maximum resolving power of the system. The slit is
wider than the width of the ion beam and therefore the scanned peak is flat topped, which
limits errors in ratio measurement caused by small drifts in ion beam position.
The larger outer collectors have slits that are approximately three times wider than the slit in
front of the axial cup. These wider slits accept ion beams from the major and minor 2 isotopes
(beams 1 and 3, respectively).
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