[time-nuts] HP 5071A Electron Multiplier of Cesium Beam Tube

J. Forster jfor at quik.com
Tue Sep 8 22:04:19 UTC 2009

Electron multiplier, not photomultiplier. Input is NOT photons.
With a scanned magnet, it could act as a RGA.



> 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
> Well... you need to ionize and then hit the photomultiplier. No fancy
> bending magnetic field really needed...
> If I end up with a used Cs tube I'll open it up and check. Would be fun.
> Need some cesium nutrition... :)
> Cheers,
> Magnus

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