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Open Access Diffusion Distortions in a Differential Mobility Analyzer with Inclined Electric Field

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Abstract:

An approach based on the calculation of the probabilities of the random displacements of particles around their regular trajectories enables us to derive analytical expressions for the normalized apparent mobility spectrum. A particular derivation is carried out for the case of a DMA with one collecting electrode, with inclined electric field, and variable electric field strength. Calculations show that an inclined electric field actually results in a sharper apparent spectrum, i.e., in a higher resolution than a transverse electric field does. A way to improve resolution by calculations is outlined.

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/02786820802587904

Affiliations: Institute of Physics, University of Tartu, Tartu, Estonia

Publication date: March 1, 2009

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tandf/uast/2009/00000043/00000003/art00004
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