Generating a pulsed electron beam using field emission with modulated voltage in EMs

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Generating a Pulsed Electron Beam using Field Emission with Modulated Voltage in EMs

In field emission electron guns (FEG), the emission of electrons can be modulated by applying a varying electric field to the tip, creating pulses of electron emission.

The key features of generating a pulsed electron beam using field emission with modulated voltage in EMs are:

Pulsed electron emission can be generated by rapidly modulating the extraction voltage applied to the sharp tip of the emitter.
Pulses can be in the nanosecond range.

This technique can be used for high-resolution time-resolved electron microscopy or experiments requiring fast switching.

Practical Electron Microscopy and Database

An Online Book, Second Edition by Dr. Yougui Liao (2006)

Generating a Pulsed Electron Beam using Field Emission with Modulated Voltage in EMs