H - Electricity – 01 – J
Patent
H - Electricity
01
J
H01J 49/00 (2006.01) H01J 49/02 (2006.01) H01J 49/40 (2006.01)
Patent
CA 2471308
A detection scheme for time-of-flight mass spectrometers is described that extends the dynamic range of spectrometers that use counting techniques while avoiding the problems of crosstalk. It is well known that a multiple anode detector capable of detecting different fractions of the incoming particles (6) may be used to increase the dynamic range of a TOFMS system. However, crosstalk between the anode (47) limits the amount by which the dynamic range may be increased. The present invention overcomes limitations imposed by crosstalk by using either a secondary amplification stage (41) or by using different primary amplification stages.
L'invention concerne un procédé de détection pour des spectromètres de masse à temps de vol permettant d'étendre la plage dynamique des spectromètres faisant appel à des techniques de comptage, tout en évitant les problèmes de diaphonie. On sait qu'un détecteur à anodes multiples pouvant détecter des fractions différentes de particules incidentes pouvait être utilisé pour accroître la plage dynamique d'un système TOFMS. Cependant, la diaphonie existant entre les anodes limite l'extension de la plage dynamique. L'invention permet de venir à bout des limites imposées par la diaphonie, en faisant appel soit à un étage d'amplification secondaire, ou à différents étages d'amplification primaire.
Fuhrer Katrin
Gonin Marc
Mccully Michael I.
Raznikov Valeri
Schultz J. Albert
Borden Ladner Gervais Llp
Ionwerks Inc.
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