4. Ionic pumps

Standard definitions :

"Ion pump with getter: a fixation pump in which gas molecules are ionized and then transferred to a pump surface where, by the action of electric fields combined or not with a magnetic field, they are fixed by a getter.

"Sublimation ion pump: a sorber ion pump in which the ionized gas is transferred to a sublimated sorber either continuously or discontinuously.

"Spray ion pump: a sorber ion pump in which ionized gas is transferred to a dispersed sorber by sputtering on a continuous basis".