cold cathode

There are, however, a number of disadvantages to cold cathode systems.

However, the always-on nature of many cold cathode lights can get boring after a while.

Neon lights are a type of cold cathode gas-discharge light.

When the noble gases are used in cold cathode tubes to produce light, each of them has a different colour.

The cold cathode system was installed in a number of gold mines and worked reliably.

In addition to blue cold cathode lighting, natural light enters the station from the street level above through 20 openings.

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

Cold cathodes sometimes have a rare earth coating to enhance electron emission.

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

Both hot cathode and cold cathode type devices are encountered.

The principle behind cold cathode version is the same, except that electrons are produced in the discharge of a high voltage.

If the light must be switched on and off frequently, Cold cathode fluorescent lamps can be used.

With the cold cathode equipment, so many variable factors are involved that there is some doubt whether a true standard can be established (Fairchild, 1983).

His early experiments were with Crookes tubes, a cold cathode electrical discharge tube.

These first generation cold cathode or Crookes X-ray tubes were used until the 1920s.

Cold cathode devices typically use a complex high-voltage power supply with some mechanism for limiting current.

O Cold cathode (by 1955 this also included semiconductors as these had no heater)

Cold cathode fluorescent lamps are designed for many more on/off cycles than standard lamps.

He also invented a type of cold cathode vacuum gauge known as Penning gauge.

The process is too fast to preheat the cathodes, so the lamp instant-starts in cold cathode mode.

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

Cold cathode discharge lamps use higher voltages than hot cathode ones.

A cold cathode electrode is melted (or welded) to each end of the tube as it is finished.

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

However, in cold cathode luminescence machines (see below), many ions are produced in addition to the electrons.