a device in which electrons obtained by thermionic emission from a heated cathode are emitted as a narrow beam.
| 单词 | θ79096 |
| 释义 | the world > matter > physics > atomic physics > particle physics > particle avoiding strong interaction > electron > [noun] > device emitting beams (3) electron gun1924 a device in which electrons obtained by thermionic emission from a heated cathode are emitted as a narrow beam. gun1933 = electron gun n. at electron, n.2 compounds 2. Also attributive, as gun electrode. undulator1951 Physics. A device in which a beam of particles is made to describe a sinusoidal path (and so emit radiation) by a series of transverse electric or… |
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