Patent ID: 8637811

Claim:
A system for stabilization of electron multiplier anode bias under a dynamic voltage input, comprising: an electron multiplier having a cathode end receiving an ion flow, an opposite emitter end and an interior surface, the electron multiplier producing an electron output from ions colliding with the interior surface; a variable power supply having a voltage output coupled to the cathode end and the emitter end of the electron multiplier, the voltage output changing dynamically to adjust the electron output from the electron multiplier; an anode in proximity to the electron multiplier; an electrometer coupled to the anode in proximity to the electron multiplier to measure the current generated by the electron output; a low pass filter circuit coupled between the emitter end to the ground of the electrometer, the low pass filter to attenuate emitter voltage changes; and a bias circuit coupled to the emitter end to stabilize emitter to anode voltage difference.