| 摘要 |
An ion guiding device is disclosed comprising a first ion guide (7) which is conjoined with a second ion guide (8). Ions are urged across a radial pseudo-potential barrier which separates the two guiding regions by a DC potential gradient. Ions may be transferred from an ion guide which has a relatively large cross- sectional profile to an ion guide which has a relatively small cross-sectional profile in order to improve the subsequent ion confinement of the ions. |
