Ion detection device for mass spectrometry, ion detection method, and method of manufacturing ion detection device

摘要

The present invention provides an ion detection apparatus, an ion detection method, and ion detection that can improve the effect of reducing stray light while improving the effect of an electric field for drawing ions to be detected to the first stage electrode of a secondary electron multiplier. An apparatus manufacturing method is provided. In one embodiment of the present invention, an ion detection apparatus including a secondary electron multiplier having a plurality of electrodes and a drawing electrode for drawing ions to the first stage electrode side of the secondary electron multiplier. When introducing ions into the ion detector, the amount of light incident on the first electrode of internal stray light generated inside the ion detector is less than or equal to the amount of light incident on the first electrode of external stray light generated outside the ion detector. As such, at least one of the area of the drawing electrode and the potential difference between the drawing electrode and the surrounding electrode that is not the electrode of the secondary electron multiplier tube but the surrounding electrode is set.