| 摘要 |
A retarding grid form of electron spectrometer utilizing a single grid structure, the retarding grid being planar and being positioned in a focusing structure that first defocuses the beam of electrons and then refocuses it onto an electron detector, the retarding grid being located in the focusing structure near the point of maximum diameter of the electron beam. The focusing structure produces very strong accelerating and decelerating fields near its beam entrance and exit regions, respectively, such that the retarding and accelerating fields at the retarding grid are very weak, resulting in sharp lines in the electron spectrum.
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