Design of the linear non-evaporable getter pump for the PEP-II B factory

There are several regions in the PEP-II B Factory at SLAC that require distributed pumping to deal with large photo-desorbed gas loads or to produce very low pressures (<10/sup -9/ Torr). These regions include the Low Energy Ring Wiggler dump chambers, the transitions between the High Energy Ring arcs and straight sections, and most importantly the Interaction Region. We have designed a compact Non-Evaporable Getter pump using commercial getters that combines high pumping speed and high sorption capacity. We describe the design features of the NEG pumps, and our test results from prototype pumps. In addition, we discuss future variations of this style of NEG pump.