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5 terms
Photonics Dictionary: A
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electrode x
A x
afterglow
The luminosity that remains in a rarefied gas after an electrodeless discharge has traversed the gas.
anticathode
->
x-ray tube target
Also known as an anticathode. An electrode or electrode section that is focused upon by an electron beam and that emits x-rays.
aperture mask
Also known as a shadow mask, a perforated plate placed between the focusing and accelerating electrodes, and the tricolor phosphor screen in a color-television tube.
arc discharge
The electric arc that is a particular discharge between two electrodes in a gas or vapor which is characterized by high cathode densities and a low voltage drop.
arc light source
In present usage, especially for spectroscopic identification, an arc between electrodes that serves as a radiation source. Gas tubes that contain mercury vapor and mixtures of helium, neon and argon...
Photonics Dictionary
A
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