The establishment of EVISA is funded by the EU through
the Fifth Framework Programme (G7RT- CT- 2002- 05112).
Supporters of EVISA includes:
Mathieu stability diagram
The Mathieu stability diagram is a graphical representation for reduced variables that incorporate the values of dc and ac voltages applied either to the four rods of a quadrupole mass filter or to the electrodes of an ion trap. The stability diagram illustrates areas of ion stability and ion instability and designates scan lines for the changes in those voltages so that the device can serve as an ion mass-to-charge ratio analyzer.