Thermionic

A similar phenomenon, known as "secondary emission", occurs in thermionic valves (vacuum tubes) where electrons of sufficient energy, when hitting a surface (or passing through some medium), induce the emission of secondary electrons from the anode. ❋ Unknown (2009)

Growth happens because we can now have a wireless conisting of a little electronic circuit board in a plastic box, instead of a huge great thing of thermionic valves in a handmade walnut cabinet. ❋ Patrick Vessey (2008)

He discovered monomolecular films with specific molecular orientation at surfaces and promoted understanding of plasmas, heat transfer, and thermionic phenomena, and invented a high-vacuum electron tube and gas-filled incandescent lamp. ❋ Unknown (2008)

It is based on the 1898 Pidgeon electrostatic machine which includes an inductance circuit, a capacitance circuit, and a thermionic rectification valve. ❋ Cliff Pickover (2007)

The resulting material has potential for use in low-friction, wear-resistant coatings, catalyst supports for fuel cells, high-voltage electronics, low-power, high-bandwidth radio frequency microelectromechanical/nanoelectromechanical systems MEMS/NEMS, thermionic energy generation, low-energy consumption flat panel displays and hydrogen storage. ❋ Unknown (2005)

Through experiments carried out in high vacuum, Owen W. Richardson could finally establish that electron emission is a purely thermionic effect and a law based on the velocity distribution of electrons in the metal could be formulated. ❋ Unknown (2000)

A member of the Russian Academy of Sciences, he has played a leading role in a wide range of nuclear projects, including cooperation with the United States on the Topaz space thermionic nuclear system, the conversion of Russian military plutonium production reactors, and security and accounting for weapons-usable nuclear materials. ❋ ITY National Archives (1996)

A "package" is a tied-together collection of hundreds of small processing units and manipulating units, a propulsion system adequate for a rendezvous, a small thermionic He-3 fusion reactor, and a central processor cortex big enough to hold a crude copy of Louie. ❋ Barnes, John, 1957- (1994)

Rectifier Circuits of Alternating Current half-wave rectification full wave rectification opposite-contact connection full-wave rectification - bridge connection full-wave rectification - thermionic rectifier in double-way connection ❋ Klaus Janoske (1991)

Relay stations are in vulnerable places, and some critical parts of the early warning system against a missile attack have been "off the air" for some time because they are waiting for new computers or for thermionic valves to be replaced by modern solid-state devices. ❋ Zuckerman, Lord (1985)

Dunyan counted on the equipment of the mess which consisted of artificial carbohydrates to produce the desired thermionic effect in conjunction with the high velocity neutrons. ❋ Mahr, Kurt (1975)

Other developments were: a holographic microscope, a new electron-velocity spectroscope an analogue computer which was a universal, non-linear "learning" predictor, recognizer and simulator of time series, a flat thin colour television tube, and a new type of thermionic converter. ❋ Unknown (1972)

A spider web of metal, sealed in a thin glass container, a wire heated to brilliant glow, in short, the thermionic tube of radio sets, is made by the hundred million, tossed about in packages, plugged into sockets — and it works! ❋ Unknown (1969)

If necessary, it could be made extremely fast by substituting thermionic-tube switching for mechanical switching, so that the full selection could be made in one one-hundredth of a second. ❋ Unknown (1969)

For their own purposes the physicists promptly constructed thermionic-tube equipment capable of counting electrical impulses at the rate of 100,000 a second. ❋ Unknown (1969)

Technical difficulties of all sorts have been ignored, certainly, but also ignored are means as yet unknown which may come any day to accelerate technical progress as violently as did the advent of the thermionic tube. ❋ Unknown (1969)

It was a wirin 'diagram, and sair ancient, too, for there were symbols for thermionic valves-vacuum tubes-in it. ❋ Blish, James (1970)

For such problems our present methods are still scarcely adequate, for in the smallest fibres the potential changes are probably too small to appear above the random fluctuations due to the operation of the thermionic valve. ❋ Unknown (1965)

The revolution in technique has come about not from any increase in the sensitivity of galvanometers and electrometers but from the use of the thermionic valve to amplify potential changes. ❋ Unknown (1965)