>> J. Forster wrote:
>>> Is it REALLY a mass spec? After all, it only detects a single ion, like
>>> a
>>> He leak detector. The He units can be tuned for He3 or He4

It is a mass spec in the sense that it detects Cs ions well and rejects
other ions, because it is "tuned" to Cs.  There is an adjustable
voltage that is used to peak up the Cs response.

Rick Karlquist N6RK


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