Use of nonevaporable getter pumps in experimental fusion reactors

Auxiliary pumping means for nuclear fusion experiments are forseen inside the plasma chamber or in separated chambers (divertors), which must develop high pumping speed and capacity for H2 and its isotopes as well as for impurities, and which must also meet special requirements regarding materials, space availability, and operating conditions. The fundamental properties of SORB-AC cartridges seem to make them particularly suitable for such pumping needs in fusion machines. A practical example is described for the case of a divertor section of such a machine. The pumping efficiency has been theoretically investigated using a Monte Carlo technique which allows the investigation of the influence of various geometrical and physical parameters