High efficiency hydrodynamic collimation vacuum interface for atmospheric pressure ion sources
Sensoren, Geräte und Komponenten
Scientists from the Max Planck Institute for Solid State Research and Technische Universität Berlin have developed a new type of atmospheric pressure interface for ambient pressure ion sources based on hydrodynamic considerations and ion trajectory computer simulations.
The hydrodynamically optimized inlet funnel is formed such that the flow of the background gas is utilized to counteract the space charge expansion of the ion cloud, which is the main source of losses. The interface is completed by a capillary and an outlet portion that is shaped to collimate the ion-gas cloud expanding into the vacuum chamber (compare Fig. 1).
This novel type of ion transfer device shows dramatically improved transmission of up to 100%. Used with a nano-electrospray source also a better stability of the ion source and a much larger acceptance volume for generated ions has been observed. Further, its simple construction makes the upgrading of present devices a simple task.
- Very high transmission of up to 100%.
- No electric or magnetic fields required for guiding of ions.
(Optionally, the transfer device can be combined with ion lenses.)
- Easy to manufacture with, e.g., electro erosion.
Patent application filed February 2012.
- Ref.-Nr.: 1201-4433-BC (710,0 KiB)
Dr. Bernd Ctortecka, M. Phil.
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