Mass selective ejection by axial resonant excitation from a linear ion trap |
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Authors: | Yuichiro Hashimoto Hideki Hasegawa Takashi Baba Izumi Waki |
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Affiliation: | Central Research Laboratory, Hitachi, Ld., Tokyo, Japan. |
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Abstract: | We describe a new mass selective ejection method from a linear ion trap, which we call axial resonant excitation (AREX). A set of vane lenses are inserted between each quadrupole rod to produce electrostatic potential that is approximately harmonic along the central axis of the quadrupole field. After ions with specific m/z are resonantly oscillated in the axial direction, the ions are mass selectively ejected in the axial direction. At a high scan rate of 11 Th/ms, AREX achieved a high ejection efficiency of more than 60%, which is more than three times higher than a conventional mass selective axial ejection method from a linear trap using fringing field. |
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