| 摘要 |
A detector suitable for a mass spectrometer is disclosed comprising a microchannel plate 8 which receives ions 12 at an input surface and releases electrons 16 from an output surface. A detecting device is arranged to receive at least some of the electrons 16 emitted from the microchannel plate 8. The detecting device e.g. electron multiplier, scintillator, photomultiplier tube, receives electrons 16 on a first portion of the detecting device at a first time t1 and receives electrons 16 on a second different portion of the detector at a second later time t2. Time-varying electric and/or magnetic fields are applied between the microchannel plate 8, and the detecting device to guide electrons 16 emitted from the microchannel plate onto different regions of the detecting device in a time varying manner. This has the benifit of reducing the effects of saturation of the detector. |
