Quasi-Planar Multi-Reflecting Time-of-Flight Mass Spectrometer

摘要

A multi-reflecting, time-of-flight (MR-TOF) mass spectrometer including two quasi-planar electrostatic ion mirrors extended along drill direction (Z) and formed of parallel electrodes, separated by a field free region. The MR-TOF includes a pulsed ion source to release ion packets at a small angle to X-direction which is orthogonal to the drill direction Z. Ion packets are reflected between ion mirrors and drill along the drift direction. The mirrors are arranged to provide time-of-flight focusing ion packets on the receiver. The MR-TOF mirrors provide spatial focusing M the Y-direction orthogonal to both drift direction Z and on injection direction X. In a preferred embodiment, at least one mirror has a feature providing periodic spatial focusing of ion packets in the drift Z-direction.

主权项

1. A multi-reflecting time-of-flight mass spectrometer comprising:
two quasi-planar electrostatic ion mirrors extended along a drift direction (Z) and formed of parallel electrodes, wherein said mirrors are separated by a field free field-free region; a pulsed ion source to release ion packets at small angle to an X direction which is orthogonal to the drift direction Z, such that the ion packets are reflected between the ion mirrors and drift along the drift direction; a receiver to receive the ion packets; wherein said mirrors are positioned to provide time-of-flight focusing on said receiver and provide spatial focusing in a Y-direction orthogonal to both the drift direction Z and the ion injection direction X; and wherein at least one of said mirrors has a periodic feature providing modulation of electrostatic field along the drift Z-direction for the purpose of periodic spatial focusing of the ion packets in the Z-direction.