X-ray tube

noun
a vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays
Part Holonyms: ↑X-ray machine

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noun
Usage: usually capitalized X
: a high-vacuum tube in which a concentrated stream of electrons from a thermionic cathode strikes a metal target and produces X rays from the side of the tube at right angles in a quantity and intensity that is controlled by the cathode temperature, with a wavelength and hardness that depends upon the voltage applied to the tube terminals, and with a spectral character determined by the material of the target

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an electronic tube for producing x-rays, essentially a cathode-ray tube in which a metal target is bombarded with high-energy electrons.
[1905-10]

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X-ray tube noun
A tube enclosing a vacuum, in which X-rays are emitted from a metal target placed obliquely opposite to an incandescent cathode whose high-energy electrons impinge on the target
• • •
Main Entry:X-ray

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X-ray tube,
a vacuum tube for generating X rays.

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n. Physics a device for generating X-rays by accelerating electrons to high energies and causing them to strike a metal target from which the X-rays are emitted

Useful english dictionary. 2012.

Look at other dictionaries:

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  • cathode-ray tube — n a vacuum tube in which a beam of electrons is projected on a fluorescent screen to produce a luminous spot * * * a vacuum tube in which the cathode rays are accelerated as a beam to form luminous spots on a fluorescent screen …   Medical dictionary

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