Method and apparatus to increase the resolution and widen...

Details Method and apparatus to increase the resolution and widen... Method and apparatus to increase the resolution and widen...

H - Electricity

01

J

H01J 49/40 (2006.01) G01N 15/02 (2006.01) G01N 27/60 (2006.01) G01N 27/64 (2006.01)

Patent

CA 2465166

A differential mobility analyzer (DMA) for separating charged particles or ions suspended in a gas and a method of using the DMA for separating such particles. The invention includes various means for increasing the resolution of the DMA by stabilizing the laminar flow within the DMA and by allowing unusually large flow velocities. These means include several screens (2,3) of high uniformity, a converging section (5), and a flow constriction leading to a nozzle (8) that isolates the working region (13) from other regions further downstream in order to avoid or reduce perturbations on the axisymmetry of steadiness of the flow in the working region (13).

L'invention concerne un analyseur de mobilité différentielle (DMA) pour séparer les particules chargées ou des ions suspendus dans un gaz ainsi qu'un procédé d'utilisation d'un DMA pour séparer de telles particules. L'invention concerne des moyens variés pour augmenter la résolution du DMA par stabilisation de l'écoulement laminaire à l'intérieur du DMA et en permettant des vitesses de courant inhabituellement élevées.

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