[[Ionization gauge]]
    Which one of these is the one that ion getter pumps act like?
            http://www.aiv.it/ITA/pubblicazioni/articolo.php?articolo=art4 says "similar to a cold cathode gauge"


+ Sputter-Ion pumps     (use [[sputtering]] to renew the titanium)

+ NEG (Non-evaporative Getter)



==== Unused sources ========
http://www.cae2k.com/howto.html#bake

    - it's not clear who the publisher is



==== Notes ====
The article now notes that the typical operating range is 10^-3 to 10^-12 torr...

    http://www.aiv.it/ITA/pubblicazioni/articolo.php?articolo=art4
        Ideally, ion pumps should be started at pressures near 1x10^-5 torr, although in practice
        starting pressures near 10^-3 torr are more common.

        The ultimate pressure of an isolated pump is the 10^-12 torr range. There is not single, simple,
        specific reason for the particular ultimate pressure