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GENERAL ELECTRICS 22PTI03 ZS-8008 Mass Spectrometer Tube
Tube pour spectromètre de masse
Massenspektrometer-Röhre

This tube is marked as follows :

GENERAL ELECTRIC

G22PTI03

ZS-8008
65-39
188-6

 

This tube has been manufactured in 1965 at the Schenectady (Power Tube Dept.) plant.

The "elbow" goes between the poles of a very large permanent magnet. The gas or vapor to be analyzed is introduced through the pipe. A hard vacuum is then pulled on the unit and a high voltage is used to ionize the molecules, which are accelerated to a particular speed (controlled by the voltage and the current applied to the plates), and sent around the bend in a strong magnetic field. The speed/mass of molecule and the magnetic field strength combine such that only molecules of a particular mass make it around the bend; the others crash into the walls. The ones that make it hit the multiplier give a current output - so the mass selection is swept through the desired range and current measured, and a quantitative display of molecular masses in the sample can be computed.

Thanks to Danial Stocks, Jim RabidWolf Hickinbotham, Nick Huwar and Ludwell Sibley who helped to identify this device.

 

GE Mass Spectrometer Tube

There is a multiplier on one end:

GE Mass Spectrometer Tube

The tube is not exhausted, there is a lateral pipe on the other end:

GE Mass Spectrometer Tube

GE Mass Spectrometer Tube

GE Mass Spectrometer Tube

GE Mass Spectrometer Tube

Before entering the metallic elbow, the beam passes through two very narrow slots:

GE Mass Spectrometer Tube

GE Mass Spectrometer Tube

GE Mass Spectrometer Tube

GE Mass Spectrometer Tube

View taken through the exhaust pipe:

GE Mass Spectrometer Tube

View taken through the base:

GE Mass Spectrometer Tube

 


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