ABSTRACT
Nonevaporable getters are being used increasingly more widely as devices for high- and ultrahigh-vacuum pumping. Finely dispersed powders of alloys and intermetallic compounds of transition metals may be used as getter materials. Nonevaporable getters are stable toward the action of corpuscular and electromagnetic radiation. This fact is of fundamental importance for built-in pumping devices of gas-discharge equipment, accelerators, and thermonuclear reactors. Nonevaporable getters are pressed on high-output automated equipment. The production of the different nonevaporable getters and getter coatings presently available relies on effective, thoroughly developed technologies, which make it possible to fabricate elements and modules of any required form. The kinetics of the sorption process also undergoes evolution, which is manifested, in particular, by the “smoothing” of the experimental kinetic curves of the sorption process. The mechanisms for the sorption of carbon monoxide, carbon dioxide, and other heavy active gases by nonevaporable getters differ significantly from the sorption of hydrogen.
