cold cathode

Cathodes used for field electron emission in vacuum tubes are called cold cathodes.

The surface of cold cathodes can emit secondary electrons at a ratio greater than unity (breakdown).

The most common design uses a cold cathode in the form of a large-area field electron source (for example a field emitter array).

Most ion gauges come in two types: hot cathode and cold cathode.

They have a cold cathode; the cathode is not heated with a filament to emit electrons.

They come in two types: hot cathode and cold cathode.

The new devices use a so-called cold cathode, the electrode from which the electrons flow.

Hot cathodes typically achieve much higher power density than cold cathodes, emitting significantly more electrons from the same surface area.

The cold cathode gives crossatron an advantage of achievable lifetime and reliability in comparison to a hydrogen-filled thyratron.

Gaseous mercury is added to cold cathode argon-filled lamps to increase the ionization and electrical conductivity.