[1] Paul W et al 1953 Z. Naturforsch. A 8 448

[2] Dawson P H 1995 Quadrupole Mass Spectrometry and Its
Applications (New York: AIP)

[3] Flford J E, Hoa D N, Hughes R J, March R E, Bonner R F and Wang G J
1980 J. Vac. Sci. Technol. 17 829

[4] Hidefumi H and Toshijiko K 2001 Rev. Sci. Instrum. 72 7

[5] Prestage J D, Dick G J and Maleki L 1987 JPL Trapped ion Frequency
Standard Development: IEEE Annual Frequency Control Symposium p
20

[6] Williams J D et al 1991 Proc. 39th ASMS Conf. Mass Spectrosc.
Allied Topics TN 1481

[7] Cai Y, Peng W P, Kuo S J and Chang H C 2002 Int. J. Mass
Spectrom. 214 63

[8] Louris J N, Brodbelt J S, Cooks R G, Glish G L and McLuckey S A
1990 Int. J. Mass Spectom. Ion Processes 96 117