Ion transport device and modes of operation thereof

Details Ion transport device and modes of operation thereof Ion transport device and modes of operation thereof

H - Electricity

01

J

H01J 49/06 (2006.01)

Patent

CA 2687222

A device for transporting and focusing ions in a low vacuum or atmospheric-pressure region of a mass spectrometer is constructed from a plurality of longitudinally spaced apart electrodes to which oscillatory (e.g., radio-frequency) voltages are applied, hi order to create a tapered field that focuses ions to a narrow beam near the device exit, the inter-electrode spacing or the oscillatory voltage amplitude is increased in the direction of ion travel.

L'invention concerne un dispositif pour transporter et focaliser des ions dans une région de faible vide ou de faible pression atmosphérique d'un spectromètre de masse qui est construit à partir d'une pluralité d'électrodes espacées longitudinalement l'une de l'autre, auxquelles des tensions oscillatoires (par exemple une radiofréquence) sont appliquées, afin de créer un champ conique qui focalise les ions en un faisceau étroit à proximité de la sortie du dispositif, l'espacement inter-électrode ou l'amplitude de tension oscillatoire étant augmenté dans la direction du trajet d'ion.

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