Characterization and reduction of number dependent sensitivity in multi-pole linear ion trap standards

The multipole linear ion trap standard developed at the Jet propulsion laboratory has demonstrated excellent short and long-term stability and improved immunity from two of its remaining systematic effects, the second order Doppler shift and second order Zeeman shift. The technology has also demonstrated long-term operation in the field. In this paper, we discuss the LITS systematic effects and present the characterization and reduction of the primary shifts and their dependence on ion number