Quadrupole Offset Voltage - Stellar MS - Stellar Mass Spectrometer Operating Manual - Quadrupole Offset Voltage - Ion Concentrating Routing Multipole - Main Components - Hardware Components - Stellar MS

The quadrupole offset voltage applied to the ICRM is responsible for the collision energy. The collision energy is the difference in potential between the region where ions start being governed mostly by the electric forces (in the vicinity of Q0, which is also known as MP0) and ICRM (where they collide with collision gas). As the offset voltage on the ICRM increases, so does the kinetic energy of the precursor ions. As a result, the energy of ion/N collisions also increases. You can set the collision energy in absolute voltage from 0 to ±120 V, or by setting a normalized collision energy in % from 0–100%.