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Edison effect

The Edison effect, named after the American inventor Thomas Alva Edison (1847-1931), describes how certain materials in a vacuum emit electrons when heated.

This effect is exploited in all electron tubes and cathode ray tubes (CRT). In this process, an electrode, the cathode, is heated and the emission generates free electrons. These are accelerated towards the anode via static and magnetic fields and influenced by different electrodes in beam intensity and direction.

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Englisch: Edison effect
Updated at: 11.06.2009
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