| 摘要 |
An ion detector, comprising a planar entrance plate with an entrance window, which comprises a first mesh; a converter assembly comprising a planar converter plate and a converter member for providing electrons upon impact of ions, said converter member being supported by said converter plate; a planar exit plate, with an exit window; the planes of the above plates being parallel, the converter plate and the exit plate facing the entrance plate, the converter member being aligned with the entrance window, the other plates being biasable with respect to the entrance plate, to provide a homogeneous electric field between the converter plate and the exit plate, respectively and the entrance plate; the ion detector further comprising a magnet assembly for providing a magnetic field in the space between the plates that the electrons from the converter plate can pass through the exit window; towards a detection assembly. |
