In this example, we build an upper part of the stability triangle for a quadrupole mass filter with hyperbolic electrodes.

The analyser has the inscribed radius ro=5 mm and 200 mm long hyperbolic electrodes. A sinusoidal RF voltage is applied to electrodes at the frequency of 2 MHz.

To plot the diagram in the DC offset-versus-RF amplitude space for 609 Da ions, a powerful 2D scan tool is used.