Patent ID: 9196467
Filing Date: 2015-11-24
Classification: G06K,H01J

Abstract:
1. A mass spectrometer, comprising: a controller configured to generate a radio frequency (RF) signal to be applied to an electrode during a mass scan, wherein the electrode generates, based on the RF signal, an electric field to be applied to sample ions during the mass scan; an ion detector configured to detect sample ions passing through the electric field and generate a corresponding ion detection signal; and a sampling circuit configured to sample the ion detection signal according to a sampling timing; wherein the controller is configured to perform successive mass scans and the RF signal has a predetermined phase relationship with the sampling timing in each of the successive mass scans, and the controller is configured to adjust a phase of the RF signal relative to the sampling timing of the sampling circuit and average the successive mass scans to cancel a portion of the RF signal present in the ion detection signal.