CPC H01J 49/4265 (2013.01) | 7 Claims |
1. An ion trap mass spectrometer comprising:
an ion trap including a first electrode and a second electrode different from the first electrode;
a first voltage controller that periodically switches a DC voltage among DC voltages having a plurality of different values and apply the DC voltages to the first electrode; and
a second voltage controller that applies a sine-wave voltage to the second electrode when ions captured in the ion trap are dissociated,
wherein the first voltage controller captures the ions in the ion trap by applying a square-wave voltage to the first electrode.
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