ION GUIDE DEVICE

摘要

An ion guide device consists of multiple layers of filament electrodes (n.1, n.2, n representing the number of layers) straightened and intersecting spatially. The filament electrodes are distributed along a guide shaft z that defines an ion guide direction. Each layer of the filament electrode comprises at least two filaments that are straightened and have a certain distance away from the guide shaft. Each layer of the filament electrode rotates about the guide shaft by a certain angle relative to the adjacent layer of the filament electrode. Therefore, the multiple layers of filament electrodes surround the guide shaft to form a through cage-like ion guide channel (21), and frames (16) for fixing the filaments are arranged at the periphery of the guide channel (21), so that interference of the device on air flows is reduced. A power supply device (19, 20) provides voltage for each layer of the filament electrode, to at least construct an electric field that causes ions to converge to the guide shaft.