Invention Grant
US09035244B2 Automatic gain control with defocusing lens 有权
自动增益控制与散焦镜头

Automatic gain control with defocusing lens
Abstract:
A method and apparatus for performing mass spectrometry using an electron source, an ion trap, and a voltage-controlled lens located between the electron source and the ion trap. A controller applies a voltage to the lens. Features of the resulting output spectrum can be analyzed to determine whether to adjust the lens voltage.
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