| 摘要 |
A tandem linear ion trap and time-of-flight mass spectrometer, where the ion trap has a straight central axis orthogonal to the flight path of the mass spectrometer. The ion trap comprises a set of electrodes, ( 401, 403, 402, 404 ) at least one of the electrodes has a slit for ejecting ions towards the mass spectrometer; a set of DC voltage supplies (+V, -V, V 1 , V 2 ) to provide discrete DC levels and a number of fast electronic switches ( 409 ) for connecting/disconnecting the DC supplies to at least two of the electrodes; a neutral gas filling the ion trap and a digital controller to provide a switching procedure of ion trapping, manipulation with ions, cooling and including a state at which all ions are ejected from the ion trap towards the mass spectrometer.
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