Detector with increased dynamic range

Details Detector with increased dynamic range Detector with increased dynamic range

H - Electricity

01

J

H01J 49/02 (2006.01) G01N 30/86 (2006.01) G01T 1/00 (2006.01)

Patent

CA 2573009

A detector assembly has a current measuring device with a saturation threshold level, and a gain variation means. A signal is generated in response to the particles detected, a first data point corresponding to a peak of interest is acquired from the signal. If the first data point is near, at or above the saturation threshold level of the current measuring device, the gain of the gain variation means is adjusted such that the peak of interest in the signal is reduced in intensity.

L'invention concerne un ensemble détecteur à dispositif de mesure de courant qui comporte un niveau de seuil de saturation et un système à variation de gain. Un signal est produit en réponse aux particules détectées, et un premier point de données correspondant à une crête spécifique est acquis à partir du signal. Si ce point est proche du niveau de seuil de saturation considéré, s'il coïncide avec lui ou bien s'il est au-dessus de lui, le gain du système à variation de gain est ajusté de sorte que la crête spécifique du signal soit réduite en intensité.

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