Mass spectrometer

H - Electricity – 01 – J

Patent

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Details

H01J 49/36 (2006.01) H01J 37/04 (2006.01) H01J 49/40 (2006.01)

Patent

CA 2663016

A collision or fragmentation cell (4) is disclosed comprising a plurality of electrodes wherein a first RF voltage (7a) is applied to an upstream group of electrodes and a second different RF voltage (7b) is applied to a downstream group of electrodes. The radial confinement of parent ions entering the collision or fragmentation cell (4) is optimised by the first RF voltage applied to the upstream group of electrodes and the radial confinement of daughter or fragment ions produced within the collision or fragmentation cell (4) is optimised by the second different RF voltage applied to the downstream group of electrodes.

Cellule de collision ou de fragmentation (4) comprenant une pluralité d'électrodes, une première tension RF (7a) étant appliquée à un groupe amont d'électrodes et une deuxième tension RF (7b) différente de la première tension RF (7a) étant appliquée à un groupe aval d'électrodes. Le confinement radial d'ions parents pénétrant dans la cellule de collision ou de fragmentation (4) est optimisé par la première tension RF appliquée au groupe amont d'électrodes, et le confinement radial d'ions fils ou fragments produits dans la cellule de collision ou de fragmentation (4) est optimisé par la deuxième tension RF appliquée au groupe aval d'électrodes.

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