FIELD: ion catching, selection, and/or analyzing ion mass.
SUBSTANCE: digital excitation device for quadruple installation such as quadruple ion trap 20, 21 has digital signal generator 11, 13, 14, and switching equipment 16, 17 that functions to alternately change over voltages 18, 19 from higher to lower level (V1, V2) and vice versa for shaping voltage in the form of square wave. Dipole excitation voltage is also supplied to quadruple installation for exciting resonant vibration motions of ions.
EFFECT: enlarged functional capabilities.
30 cl, 7 dwg
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