ION DETECTION DEVICE FOR MASS ANALYSIS, ION DETECTION METHOD, AND PRODUCTION METHOD FOR ION DETECTION DEVICE

摘要

Provided are an ion detection device, an ion detection method, and a production method for the ion detection device, wherein the effect of an electric field to bring ions to be detected toward a first-stage electrode of a secondary electron multiplier is improved and the effect of stray-light reduction is also improved.  The ion detection device includes the secondary electron multiplier which includes a plurality of electrodes, and a bring-in electrode which brings ions toward the first-stage electrode of the secondary electron multiplier.  When ions are brought into the ion detection device, at least either the area of the bring-in electrode or the difference in potential between the bring-in electrode and an electrode that is disposed around the bring-in electrode and the secondary electron multiplier does not have is set so that the intensity of internal stray-light that is produced inside the ion detection device and falls on the first-stage electrode is below the intensity of external stray-light that is produced outside the ion detection device and falls on the first-stage electrode.