Evaporable Getter Research Articles

An updated review of getters and gettering

A brief review of present day getter materials is made with reference to the two principal families, i.e., evaporable and nonevaporable getters. The main physicochemical processes involved in the gettering process are reviewed in order to establish the concept of gettering-selective chemical pumping. Examples of practical getter devices are described in connection with a brief overview of some of the most common applications. However, most emphasis will be placed in describing some of the most advanced and more unusual applications of getters which may not always be in widespread use but which indicate the versatility of gettering in widely differing fields.

Distributed Pumping by Non-Evaporable Getters in Particle Accelerators

Distributed pumping in particle accelerators has recently been proposed as an interesting approach to maximize the pumping efficiency inside the chambers. The distributed pumping can mainly be performed by ion pumping structures or by non-evaporable getter devices arranged along the inner walls of the chambers. The non evaporable getter approach, which appears to have very promising technical and economical impact, is considered and discussed. In particular reference is made to the use of non-magnetic strip coated with both high temperature (700-800°C) activatable getter materials and low temperature (less than 500° C) activat able getter materials of more recent development. The sorption characteristics of these getter coated strips are reported for the most important gases after efficient activation. The results show the possibility of attaining high "linear" pumping speeds, ie. as high as a few hundred liters per second per meter of chamber length for hydrogen. The suitable modes of operation of the getter coated strips for this specific application are also discussed together with the preliminary results of the practical embodiment of this approach.