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Abstract
The stability regions formed by the asymmetric sinusoidal shape of the periodic supply potential of the quadrupole mass filter are calculated, with the signal duty cycle . Two cases are considered, when and , where and are the amplitudes of the positive and negative parts of the sinusoid. Stability islands are revealed, where the QMF operation is possible by changing amplitude without DC potential. For the values and , the mass selected instability mode with a resolution of about 7000 is found. In this island, the potential well depth reaches its maximum along the Y coordinate. At the amplitudes and , stability regions are formed, the operation in which allows reaching . The results of the transmission and excitation contours modeling confirm the validity of the method for calculating the stability diagrams of a linear quadrupole with asymmetric sinusoidal waveform.
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