secondary-emission tube

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• Secondary emission — is a phenomenon where additional electrons, called secondary electrons, are emitted from the surface of a material when an incident particle (often, charged particle such as electron or ion) impacts the material with sufficient energy. The number …   Wikipedia

• secondary emission — the emission of electrons (secondary electrons) from a material that is bombarded with electrons or ions. [1930 35] * * * ▪ physics       ejection of electrons (electron) from a solid that is bombarded by a beam of charged particles. Some… …   Universalium

• Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …   Wikipedia

• Video camera tube — In older video cameras, before the mid to late 1980s, a video camera tube or pickup tube was used instead of a charge coupled device (CCD) for converting an optical image into an electrical signal. Several types were in use from the 1930s to the… …   Wikipedia

• electron tube — an electronic device that consists, typically, of a sealed glass bulb containing two or more electrodes: used to generate, amplify, and rectify electric oscillations and alternating currents. Also called electronic tube. Cf. gas tube, vacuum tube …   Universalium

• Cathode ray tube — Cutaway rendering of a color CRT: 1. Three Electron guns (for red, green, and blue phosphor dots) 2. Electron beams 3. Focusing coils 4. Deflection coils 5. Anode connection 6. Mask for separating beams for red,… …   Wikipedia

• Williams tube — The Williams tube or the Williams Kilburn tube (after inventors Freddie Williams and Tom Kilburn), developed about 1946 or 1947, was a cathode ray tube used to electronically store binary data.Working principleThe Williams tube depends on an… …   Wikipedia

• Russian tube designations — Receiver tubes = In the 1950s a 5 element system (GOST 5461 59, later 13393 76) was adopted in the (then) Soviet Union for designating receiver vacuum tubes.The 1st element (from left to right) is (for receiving tubes) a number specifying… …   Wikipedia

• Mullard-Philips tube designation — In Europe, the principal method of numbering vacuum tubes (or thermionic valves , as they are referred to in Europe and Australia, etc.) was the nomenclature developed and used by Mullard in the UK and applied Europe wide thanks to their… …   Wikipedia

• Selectron tube — The Selectron was an early form of digital computer memory developed by Jan A. Rajchman and his group at the Radio Corporation of America under the direction of Vladimir Zworykin, of television technology fame. Development Development started in… …   Wikipedia

• photomultiplier tube — pho·to·mul·ti·pli·er tube .fōt ō məl tə .plī( ə)r n a vacuum tube that detects light esp. from dim sources through the use of photoemission and successive instances of secondary emission to produce enough electrons to generate a useful current… …   Medical dictionary