Method of fast start and/or fast termination of a radio...

H - Electricity – 03 – B

Patent

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Details

H03B 11/04 (2006.01) H01J 49/40 (2006.01) H01J 49/42 (2006.01) H03B 11/10 (2006.01)

Patent

CA 2355193

The invention aims to provide a method of fast start of an RF resonator and/or fast termination of the resonator to achieve a high efficiency of ion trapping from the MALDI ion source and/or effective extraction of the ions into a time-of flight mass spectrometer. The resonator has a coil (2), a capacitor (1) and two switches with internal resistance (4, 5). One end of the switches is connected to a junction of the coil (2) and the capacitor (1) where a RF voltage is provided, and another end of each switch is connected to high voltage power supplies with opposite polarities (6, 7). The method comprises: closing one of the switches for a short period of time for fast start of the RF resonator, and/or closing both switches for a while for fast termination of the RF resonator.

L'invention concerne un procédé de démarrage et/ou terminaison rapides d'un résonateur à fréquences radioélectriques, lequel présente une bobine (2), un condensateur (1) ainsi que deux commutateurs dotés d'une résistance intérieure (4, 5). Une extrémité des commutateurs est connectée à une jonction de la bobine (2) et du condensateur (1) à l'endroit de fourniture d'une tension aux fréquences radioélectriques, l'autre extrémité de chaque commutateur étant connectée à des alimentations de puissance haute tension présentant des polarités opposées (6, 7). Le procédé de l'invention consiste à fermer l'un des commutateurs pendant une courte période, pour permettre le démarrage rapide du résonateur à fréquences radioélectriques, et/ou fermer les deux commutateurs pendant un moment pour permettre une terminaison rapide dudit résonateur.

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