electron detection造句

Everhart began working on electron detection and the design of scanning electron microscopes ( SEMs ) as a student with Charles Oatley at Cambridge in 1955.
The signal from the detector was broken up into nine channels, the lowest six dedicated to electron detection and the highest three to protons and heavier ions.
Threshold electron detection was first based line-of-sight, i . e . a small positive field is applied towards the electron detector, and kinetic energy electrons with perpendicular velocities are stopped by small apertures.
An external voltage divider is used to apply 100 volts to the acceleration optics ( for electron detection ), each MCP, the gap between the MCPs, and the backside of the last MCP and the collector ( anode ).
In the early works, a fixed energy light source was used, and the electron detection was carried out using retarding grids or Franck Condon factors in the photoelectron spectrum, but threshold electrons can still be emitted via other ionization mechanisms.
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