On the application of the method of stroboscopic samples in the study of quadrupole excitation and quadrupole resonance

The paper analyzes some logical errors which exist in new theory of the quadrupole excitations for rf quadrupole mass filters which was suggested by M. Yu. Sudakov and E. V. Mamontov using the analysis of the envelopes for the stroboscopic samples of coordinates and velocities of ions in the rf quadrupole field. The paper also shows that by direct using of the equations produced by the perturbation theory it is possible to produce a clear model describing the main properties of quadrupole excitation, for which stroboscopic samplings are not required.