quadrupole ion storage trap

https://doi.org/10.1351/goldbook.Q04970
An arrangement in which ions with a desired range of quotients mass/charge are trapped by making them describe @S05900@ paths under the effect of a static and a high-frequency electric quadrupole field.
Source:
PAC, 1991, 63, 1541. (Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)) on page 1546 [Terms] [Paper]