getter pump

 
 

A getter pump contains a material which is able to bind the rest gas molecules in such a stable way that they do not escape again during the experiment. Getter pumps come in two varieties, as evaporable and non-evaporable getter materials. The evaporable getters are treated here under titanium sublimation pumps. Non-evaporable getter pumps are usually containing a material which reacts with the rest gas but which can be regenerated after use by heating it to a high temperature in vacuum. If the temperature needed for this is not too high, this can be done during in connection with the bakeout.

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