ION GENERATION DEVICE AND ION GENERATION METHOD

摘要

The invention relates to an ion generation device and an ion generation method, and more particularly to a device and a method which generates ions at the low pressure and then said ions can be transferred into the next stage in an off-axis manner. In the invention, ions from electrospray or other types of ion source are generated in the pressure which is lower than atmosphere pressure. A followed ion guide device can then transfer most of said generated ions into next stage in an off-axis manner, while most of neutral noise can be eliminated in this process.

主权项

1. An ion generation device, comprising:
a chamber, wherein the pressure is lower than the atmosphere pressure; an electrospray ion source, located in said low pressure chamber, and used for generating ions in said chamber; an ion guide device, located in said chamber and at the downstream of said ion source, wherein said ion guide device being divided into at least two electrically insulating parts in the radial direction, wherein an offset voltage being applied between said at least two parts, wherein said generated ions are guided along the direction which deviates from the spray direction under said offset voltage; and an ion outlet port, located at the downstream of said ion guide device, by which the ions being guided out of said chamber, wherein the direction of ions being guided out deviates from the spray direction.