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1 мазер
maser oscillator, maser device, paramagnetic amplifier, maser -
2 мазер
maser device, paramagnetic amplifier, maser, maser oscillator -
3 메이저
n. maser, device for amplifying microwaves by radiation (used for amplification and in radar equipment) -
4 Townes, Charles Hard
SUBJECT AREA: Electronics and information technology[br]b. 28 July 1915 Greenville, South Carolina, USA[br]American physicist who developed the maser and contributed to the development of the laser.[br]Charles H.Townes entered Furman University, Greenville, at the early age of 16 and in 1935 obtained a BA in modern languages and a BS in physics. After a year of postgraduate study at Duke University, he received a master's degree in physics in 1936. He then went on to the California Institute of Technology, where he obtained a PhD in 1939. From 1939 to 1947 he worked at the Bell Telephone Laboratories, mainly on airborne radar, although he also did some work on radio astronomy. In 1948 he joined Columbia University as Associate Professor of Physics and in 1950 was appointed a full professor. He was Director of the University's Radiation Laboratory from 1950 to 1952, and from 1952 to 1955 he was Chairman of the Physics Department.To meet the need for an oscillator generating very short wavelength electromagnetic radiation, Townes in 1951 realized that use could be made of the different natural energy levels of atoms and molecules. The practical application of this idea was achieved in his laboratory in 1953 using ammonia gas to make the device known as a maser (an acronym of microwave amplification by stimulated emission of radiation). The maser was developed in the next few years and in 1958, in a joint paper with his brother-in-law Arthur L. Schawlow, Townes suggested the possibility of a further development into optical frequencies or an optical maser, later known as a laser (an acronym of light amplification by stimulated emission of radiation). Two years later the first such device was made by Theodore H. Maiman.In 1959 Townes was given leave from Columbia University to serve as Vice-President and Director of Research at the Institute for Defense Analyses until 1961. He was then appointed Provost and Professor of Physics at the Massachusetts Institute of Technology. In 1967 he became University Professor of Physics at the University of California, where he has extended his research interests in the field of microwave and infra-red astronomy. He is a member of the National Academy of Sciences, the Institute of Electrical and Electronics Engineers and the American Astronomical Society.[br]Principal Honours and DistinctionsNobel Prize for Physics 1964. Foreign Member, Royal Society of London. President, American Physical Society 1967. Townes has received many awards from American and other scientific societies and institutions and honorary degrees from more than twenty universities.BibliographyTownes is the author of many scientific papers and, with Arthur L.Schawlow, ofMicrowave Spectroscopy (1955).1980, entry, McGraw-Hill Modern Scientists and Engineers, Part 3, New York, pp. 227– 8 (autobiography).1991, entry, The Nobel Century, London, p. 106 (autobiography).Further ReadingT.Wasson (ed.), 1987, Nobel Prize Winners, New York, pp. 1,071–3 (contains a short biography).RTS -
5 Schawlow, Arthur Leonard
[br]b. 5 May 1921 Mount Vernon, New York, USA[br]American physicist involved in laser-spectroscopy research.[br]When Arthur L.Schawlow was 3 years old his family moved to Canada: it was in Toronto that he received his education, graduating from the University of Toronto with a BA in physics in 1941. He was awarded an MA in 1942, taught classes for military personnel at the University until 1944 and worked for a year on radar equipment. He returned to the University of Toronto in 1945 to carry out research on optical spectroscopy and received his PhD in 1949. From 1949 to 1951 he held a postgraduate fellowship at Columbia University, where he worked with Charles H. Townes on microwave spectroscopy. From 1951 to 1961 he was a research physicist at the Bell Telephone Laboratories, working mainly on superconductivity, but he maintained his association with Townes, who had pioneered the maser (an acronym of microwave amplification by stimulated emission of radiation). In a paper published in Physical Review in December 1958, Townes and Schawlow suggested the possibility of a development into optical frequencies or an optical maser, later known as a laser (an acronym of light amplification by stimulated emission of radiation). In 1960 the first such device was made by Theodore H. Maiman. In 1960 Schawlow returned to Columbia University as a visiting professor and in the following year was appointed Professor of Physics at Stanford University, where he continued his researches in laser spectroscopy. He is a member of the National Academy of Sciences, the American Physical Society, the Optical Society of America and the Institute of Electrical and Electronic Engineers.[br]Principal Honours and DistinctionsNobel Prize for Physics 1981. Franklin Institute Stuart Ballantine Medal 1962. Institute of Physics of London Thomas Young Medal and Prize 1963. Institute of Electrical and Electronics Engineers Morris N.Liebmann Memorial Prize 1964. Optical Society of America Frederick Ives Medal 1976. Honorary degrees from the State University of Ghent, the University of Bradford and the University of Toronto.BibliographySchawlow is the author of many scientific papers and, with Charles H.Townes, ofMicrowave Spectroscopy (1955).Further ReadingT.Wasson (ed.), 1987, Nobel Prize Winners, New York, pp. 930–3 (contains a short biography).RTSBiographical history of technology > Schawlow, Arthur Leonard
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6 лазер
laser oscillator, laser device, laser, optical maser -
7 лазер
laser device, laser, optical maser, laser oscillator
См. также в других словарях:
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MASER — microwave amplification by stimulated emission of radiation * * * ma·ser mā zər n a device that utilizes the natural oscillations of atoms or molecules between energy levels for generating electromagnetic radiation in the microwave region of the… … Medical dictionary
maser — noun Etymology: microwave amplification by stimulated emission of radiation Date: 1955 a device or object that emits coherent microwave radiation produced by the natural oscillations of atoms or molecules between energy levels … New Collegiate Dictionary
maser — noun /ˈmeɪzɚ/ a) a device for the coherent amplification or generation of electromagnetic radiation (especially of microwave frequency) by the use of excitation energy in resonant atomic or molecular systems … Wiktionary
maser — meɪzÉ™(r) n. device for amplifying microwaves by radiation (used for amplification and in radar equipment) … English contemporary dictionary
maser — ma•ser [[t]ˈmeɪ zər[/t]] n. a device for producing or amplifying electromagnetic waves by exciting atoms and causing them to radiate their energy in phase Compare laser • Etymology: 1955; m(icrowave) a(mplification by) s(timulated) e(mission of)… … From formal English to slang
maser — /ˈmeɪsə/ (say maysuh) noun a device for obtaining low noise amplification of microwave oscillations of precisely determined frequencies. {m(icrowave) a(mplification by) s(timulated) e(mission of) r(adiation)} …
