thermionic tube
11thermionic converter — thermionic converter, an electronic device that changes heat directly into electricity. It consists of two metallic electrodes held in a tube at different temperatures and separated by a gas at low pressure. When the electrons on the surface of… …
12Thermionic emission — Closeup of the filament on a low pressure mercury gas discharge lamp showing white thermionic emission mix coating on the central portion of the coil. Typically made of a mixture of barium, strontium and calcium oxides, the coating is sputtered… …
13Tube électronique — Un tube électronique (vacuum tube en américain ou thermionic valve en anglais), également appelé tube à vide ou même lampe, est un composant électronique actif, généralement utilisé comme amplificateur de signal. Le tube à vide redresseur ou… …
14thermionic — adj. of or relating to electrons emitted from a substance at very high temperature. Phrases and idioms: thermionic emission the emission of electrons from a heated source. thermionic valve (US tube) a device giving a flow of thermionic electrons… …
15tube — noun 1》 a long, hollow cylinder used for conveying or holding liquids or gases. ↘a long flexible metal or plastic container sealed at one end and with a cap at the other. ↘material forming tubes. 2》 Anatomy, Zoology, & Botany a hollow… …
16thermionic current — noun an electric current produced between two electrodes as a result of electrons emitted by thermionic emission • Hypernyms: ↑current, ↑electric current * * * noun : an electric current due to the directed movements of thermions (as in the… …
17tube — n. & v. n. 1 a long hollow rigid or flexible cylinder, esp. for holding or carrying air, liquids, etc. 2 a soft metal or plastic cylinder sealed at one end and having a screw cap at the other, for holding a semi liquid substance ready for use (a… …
18thermionic valve — Brit. See vacuum tube. [1915 20] * * * …
19X-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 • Hypernyms: ↑tube, ↑vacuum tube, ↑thermionic vacuum tube, ↑thermionic tube, ↑electron tube, ↑thermionic valve •… …
20rectifying tube — noun a thermionic tube having two electrodes; used as a rectifier • Syn: ↑diode, ↑rectifying valve • Hypernyms: ↑tube, ↑vacuum tube, ↑thermionic vacuum tube, ↑thermionic tube, ↑electron tube, ↑ …
