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Focusing mass spectrometer ion guide, spectrometer and methods
Focusing mass spectrometer ion guide, spectrometer and methods
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机译:聚焦质谱仪离子导向仪,光谱仪及方法
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摘要
An ion guide includes multiple stages. An electric field within each stage guides ions along a guide axis. Within each stage, amplitude and frequency, and resolving potential of the electric field may be independently varied. The geometry of the rods maintains a similarly shaped field from stage to stage, allowing efficient guidance of the ions along the axis. In particular, each rod segment of the ith of stage has a cross sectional radius ri, and a central axis located a distance Ri+ri from the guide axis. The ratio ri/Ri and is substantially constant along the guide axis, thereby preserving the shape of the field.
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