| 摘要 |
A FAIMS cell has an elongated inner electrode with a longitudinal axis extending along a first direction. The inner electrode has a curved outer surface that defines a circle when viewed in a cross section that is taken in a plane normal to the longitudinal axis, which itself passes through the center of the circle so defined. An outer electrod e having an inner surface is disposed in a spaced-apart facing relationship relative to the outer surface of the inner electrode so as to define an analytical gap therebetween. A first ion inlet orifice is defined through a first portion of the outer electrode, and an ion outlet orifice is defined through a second portion of the outer electrode. In particular, the first io n inlet orifice has a first ion injection axis that does not pass through the center of the circle . Furthermore, the second electrode does not have defined through any portion thereof an ion inlet orifice having an ion injection axis that passes through the center of the circle.
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