Patent ID: 9673033
Date: 2017-06-06
CPC Classifications: H01J

Claim:
1. A multi-reflection mass spectrometer comprising two ion-optical mirrors, each mirror elongated generally along a drift direction (Y), each mirror opposing the other in an X direction and having a space therebetween, the X direction being orthogonal to the Y direction; the spectrometer further comprising an ion injector located at one end of the ion-optical mirrors in the drift direction, arranged so that in use it injects ions such that they oscillate between the ion-optical mirrors, reflecting from one mirror to the other generally orthogonally to the drift direction a plurality of times, turning the ions within each mirror whilst the ions proceed along the drift direction Y; wherein a distance between subsequent points at which the ions turn in the Y-direction changes monotonously with Y during at least a part of the motion of the ions along the drift direction.