Mass spectrometer

H - Electricity – 01 – J

Patent

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Details

H01J 49/42 (2006.01) G01N 27/64 (2006.01)

Patent

CA 2484125

A mass spectrometer is disclosed comprising a guide wire ion guide (1) having an outer cylindrical electrode (2) and an inner guide wire electrode (3). AC and DC potential differences are maintained between the outer electrode (2) and the inner electrode (3) so that ions are radially confined within the ion guide (1) in an annular potential well. The outer electrode (2) may be segmented and axial potential wells created along the length of the ion guide (1) may be translated along the length of the ion guide (1) by applying additional transient DC potentials to the segments forming the outer electrode (2).

L'invention concerne un spectromètre de masse qui comprend un guide d'ions (1) à fil de guidage muni d'une électrode cylindrique externe (2) et d'une électrode interne (3) à fil de guidage. Des différences de potentiel c.a. et c.c. sont maintenues entre l'électrode externe (2) et l'électrode interne (3), de manière à ce que les ions soient confinés radialement à l'intérieur du guide d'ions (1) à l'intérieur d'une lacune de potentiel annulaire. L'électrode externe (2) peut être segmentée, et l'on peut translater des lacunes de potentiel axiales créées sur toute la longueur du guide d'ions (1) le long du guide d'ions (1) par l'application de potentiels supplémentaires de transition de c.c. aux segments formant l'électrode externe (2).

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