Copyright © Philip M. Parker, INSEAD. Terms of Use.
Definition: Magnetron |
MagnetronNoun1. A diode vacuum tube in which the flow of electrons from a central cathode to a cylindrical anode is controlled by crossed magnetic and electric fields; used mainly in microwave oscillators. Source: WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved. |
| Domain | Definitions |
Aerospace | An electron tube characterized by the interaction of electrons with the electric field of a circuit element in crossed steady electric and magnetic fields to produce alternating-current power output. (references) |
Electrical Engineering | A crossed-field tube in which both the electron beam and the slow-wave structure are re-entrant. Source: European Union. (references) |
| An electron valve (tube) in which electrons interact with the electric field of a circuit element. . . to produce an alternating current power output. Source: European Union. (references) | |
Industry | An ultra high frequency(UHF)diode oscillator containing its own cavity resonator in which electrons are whirled in a circular path by a magnetic field. Source: European Union. (references) |
Physics | Class of vacuum devices with a closed ExB path for electron circulation. The term is used for both microwave sources and for sputtering discharges. The latter are widely used for physical vapor deposition (PVD) of thin films; they use magnets located behind an electrode to confine electrons, thereby allowing a plasma discharge to be sustained by electron-impact ionization at a reduced gas pressure, and enhancing the sputtering rate due to ion bombardment of the electrode. (references) |
Source: compiled by the editor from various references; see credits. | |
(From Wikipedia, the free Encyclopedia)
The tube consists of a hot filament charged by direct current, built into a resonant cavity and the whole assembly placed in a magnetic field, which deflects the electrons boiling off of the filament, adding energy to the cavity. The charges in the cavity slosh around at its resonant frequency which for microwave ovens is 2.45 GHz, resulting in radiation with a wavelength of 12cm.
There was an urgent need during radar development in World War II for a microwave generator that worked in shorter wavelengths - around 10cm rather than 150cm - available from generators of the time. In 1940, at Birmingham University, John Randall and Harry Boot produced a working prototype of the cavity magnetron, and soon managed to increase its power output 100-fold. In August 1941, the first production model was shipped to the United States.
Since then, many million cavity magnetrons have been manufactured; some for radar, but the vast majority for another application that was completely unanticipated at the time - the microwave oven.
See also:
Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Magnetron."
| The following table is compiled from various sources, across various languages. When English abbreviations or acronyms come from a non-English source, this is noted. | |||
| Entry | Source | Expression | Field |
| MAD | English | Magnetron activated deposition | N/A |
Source: compiled by the editor, based on several corpora (additional references). | |||
Crosswords: Magnetron |
| Specialty definitions using "magnetron": cold-cathode ionization gage ♦ magnetron tube ♦ pulsed magnetron. (references) |
| Non-English Usage: "Magnetron" is also a word in the following languages with English translations in parentheses. Albanian (magnetron), Hungarian (magnetron), Serbo-Croatian (magnetron), Swedish (magneton). |
| Domain | Title |
Books | |
Source: compiled by the editor from various references; see credits. | |
| Subject | Topic | Quote |
Business | ITRI's research can support the development, production and maintenance of military weaponry systems, notably the magnetron and traveling wave tubes. (references) | |
Source: compiled by the editor from ICON Group International, Inc.; see credits. | ||
| "Magnetron" is generally used as a noun (singular) -- approximately 100.00% of the time. "Magnetron" is used about 18 times out of a sample of 100 million words spoken or written in English. Its rank is based on over 700,000 words used in the English language. Some parts-of-speech are not covered due to the samples used by the British National Corpus. (note: percents less than one-hundredth of one percent have been omitted) |
| Parts of Speech | Percent | Usage per 100 Million Words | Rank in English |
| Noun (singular) | 100% | 18 | 82,615 |
Source: compiled by the editor from several corpora; see credits.
Expressions using "magnetron": magnetron tube ♦ pulsed magnetron. Additional references. | |
| Source: compiled by the editor from various references; see credits. |
| The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com. |
| Expression | Frequency per Day |
magnetron | 119 |
magnetron tube | 12 |
combi magnetron | 11 |
magnetron microwave | 9 |
magnetron sputtering | 6 |
industrial magnetron | 4 |
magnetron replacement tube | 4 |
magnetron super | 4 |
magnetron theory | 4 |
magnetron microwave oven | 4 |
| Source: compiled by the editor from various references; see credits. | |
| Language | Translations for "magnetron"; alternative meanings/domain in parentheses. | |
Albanian | magnetron. (various references) | |
Arabic | المغنطرون. (various references) | |
Chinese | 磁控管. (various references) | |
Danish | magnetron. (various references) | |
Dutch | magnetron. (various references) | |
Finnish | magnetroni. (various references) | |
French | magnétron (magnetron tube). (various references) | |
German | Magnetfeldröhre. (various references) | |
Greek | μάγνητρο, λυχνία μάγνετρον. (various references) | |
Hungarian | magnetron. (various references) | |
Italian | magnetron. (various references) | |
Korean | 자 관. (various references) | |
Pig Latin | agnetronmay.(various references) | |
Portuguese | magnetrão. (various references) | |
Russian | магнетрон (cavity magnetron). (various references) | |
Serbo-Croatian | magnetron. (various references) | |
Spanish | magnetrón. (various references) | |
Swedish | magnetron (magneton). (various references) | |
| Source: compiled by the editor from various translation references. | ||
Derivations | |
Words beginning with "magnetron": magnetrons. (additional references) | |
| |
"Magnetron" is suggested in spellcheckers for the following: Magnatron, Magnedon, Margetson, Montbron. (additional references) | |
| Source: compiled by the editor, based on several corpora (additional references). | |
| # of Phoneme Matches | Pronunciation | Word(s) rhyming with "magnetron" (pronounced ma"gnutrÄ'n) |
| 5 | -u t r Ä' n | positron. |
| 4 | -t r Ä' n | neutron. |
| 3 | -r Ä' n | boron, micron, moron. |
Source: compiled by the editor (additional references); see credits. | ||
Scrabble® Enable2K-Verified Anagrams | |
| Words within the letters "a-e-g-m-n-n-o-r-t" | |
-1 letter: magneton, negatron, ornament. | |
-2 letters: agnomen, garment, magneto, marengo, margent, megaton, moneran, montage, montane, negaton, negator, nongame, nonmeat, regnant, remnant, rontgen, tonearm, tongman, tongmen, tonnage. | |
-3 letters: argent, atoner, enamor, engram, gannet, garnet, garote, german, magnet, manger, manner, marten, matron, mentor, moaner, monger, morgan, morgen, natron, nonage, nonart, omenta, onager, orange, orgeat, ornate, ragmen, tanner, tonger, tonner. | |
-4 letters: agent, agone, ament, among, amort, anent, anger, antre, argon, argot, armet, atone, enorm, ergot, gamer, gator, gemot, genoa, genom, genro, gnome, goner, grant, grate, great, groan, groat, magot, mange, mango, manor, marge, mater, meant, menta, metro, monte, morae, namer, nomen, nonet, noter, oaten, oater, omega, orang, orate, organ, ramen, ramet, range, regma, regna, reman, retag, roman, tamer, tango, targe, tenon, tenor, terga, togae, toman, toner, tonga, tonne, trona, trone. | |
-5 letters: aeon, aero, ager, agon, amen, anon, ante, atom, earn, ergo, etna, gaen, game, gane, gate, gear, gent, germ, geta, gnar, gnat, goat, goer, gone, gore, gram, gran, grat, grot, mage, mane, mano, mare, mart, mate, mean, meat, meno, meta, moan, moat, mora, more, morn, mort, mote, name, near, neat, nema, neon, noma, nome, nona, none, norm, nota, note, ogam, ogre, omen, omer, rage, rang, rant, rate, rato, ream, rent, roam, roan, rota, rote, tame, tang, tare, tarn, taro, team, tear, term, tern, toea, toga, tome, tone, tong, tora, tore, torn, tram. | |
| Words containing the letters "a-e-g-m-n-n-o-r-t" | |
+1 letter: magnetrons. | |
+2 letters: centimorgan, germination, nonargument, ornamenting. | |
+3 letters: centimorgans, emargination, germinations, governmental, impregnation, nonarguments, renominating. | |
+4 letters: aggiornamento, argumentation, demonstrating, emarginations, encouragement, fragmentation, germanization, impersonating, impregnations, predominating, prenominating, regimentation, remonstrating, roentgenogram. | |
+5 letters: aggiornamentos, antigovernment, argumentations, compartmenting, conglomerating, conglomeration, countermanding, encouragements, fragmentations, germanizations, governmentally, intercomparing, mongrelization, mountaineering, nongeometrical, nonterminating, outmaneuvering, regimentations, retransforming, roentgenograms. | |
| Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. | |
Hexadecimal (or equivalents, 770AD-1900s) (references)4D 61 67 6E 65 74 72 6F 6E |
| Leonardo da Vinci (1452-1519; backwards) (references)
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| American Sign Language (origins from 1620-1817 in Italy and, especially, France) (references)
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| Semaphore (1791, in France) (references)
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| Braille (1829, in France) (references)
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Morse Code (1836) (references)-- .- --. -. . - .-. --- -. |
| Dancing Men (Sir Arthur Conan Doyle, 1903) (references)
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Binary Code (1918-1938, probably earlier) (references)01001101 01100001 01100111 01101110 01100101 01110100 01110010 01101111 01101110 |
HTML Code (1990) (references)M a g n e t r o n |
ISO 10646 (1991-1993) (references)004D 0061 0067 006E 0065 0074 0072 006F 006E |
| British Sign Language (Fingerspelling, BSL; 1992, British Deaf Association Dictionary of British Sign Language) (references)
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Encryption (beginner's substitution cypher): (references)476773807186848180 |
| 1. Definition 2. Crosswords 3. Usage: Commercial 4. Quotations: Non-fiction | 5. Usage Frequency 6. Expressions 7. Expressions: Internet 8. Translations: Modern | 9. Abbreviations 10. Acronyms 11. Derivations 12. Rhymes | 13. Anagrams 14. Orthography 15. Bibliography |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
