Method for providing barrier fields at the entrance and exit...

H - Electricity – 01 – J

Patent

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H01J 49/42 (2006.01)

Patent

CA 2565909

A mass spectrometer and a method of operating same is provided. The mass spectrometer has an elongated rod set. The rod set has an entrance end and an exit end. An RF drive voltage is applied to the rod set to radially confine a first group of ions and a second group of ions of opposite polarity in the rod set. An entrance auxiliary RF voltage is applied to the entrance end and an exit auxiliary RF voltage to the exit end relative to the RF drive voltage, to trap both the first group of ions and the second group of ions in the rod set.

L'invention concerne un spectromètre de masse et un procédé de fonctionnement de ce dernier. Ledit spectromètre de masse présente un ensemble allongé de tiges. L'ensemble de tiges comprend une extrémité d'entrée et une extrémité de sortie. Une tension d'alimentation RF est appliquée sur l'ensemble de tiges afin de confiner de manière radiale un premier groupe d'ions et un deuxième groupe d'ions de polarité opposée dans l'ensemble de tiges. Une tension RF auxiliaire d'entrée est appliquée à l'extrémité d'entrée et une tension RF auxiliaire de sortie est appliquée à l'extrémité de sortie en fonction de la tension d'alimentation RF, afin de piéger le premier et le deuxième groupe d'ions dans l'ensemble de tiges.

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