MASER - meaning and definition. What is MASER
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What (who) is MASER - definition

DEVICE THAT PRODUCES COHERENT ELECTROMAGNETIC WAVES THROUGH AMPLIFICATION BY STIMULATED EMISSION
MASER; Microwave laser; Masers; Irasers; List of maser types; Micromaser; Microwave amplification by stimulated emission of radiation; Microwave Amplification by Stimulated Emission of Radiation; Masers in science fiction; Ammonia maser; Radio laser; Raser
  • quadrupole]] state selector, and the resonant cavity is at right. The 24 GHz microwaves exit through the vertical [[waveguide]] Townes is adjusting. At bottom are the vacuum pumps.
  • A hydrogen maser.
  • hydrogen maser]] (see description below)

Maser         
·noun ·same·as Mazer.
maser         
['me?z?]
¦ noun a form of laser generating a beam of microwaves.
Origin
1950s: acronym from microwave amplification by the stimulated emission of radiation.
Maser (rocket)         
SOUNDING ROCKET LAUNCHED FROM ESRANGE IN SWEDEN
MASER is a sounding rocket that is used in the MASER microgravity research rocket programme, which is operated by the Swedish Space Corporation (SSC). The main customer is the European Space Agency (ESA), and in particular its EMIR and ELIPS programmes.

Wikipedia

Maser

A maser (, an acronym for microwave amplification by stimulated emission of radiation) is a device that produces coherent electromagnetic waves through amplification by stimulated emission. The first maser was built by Charles H. Townes, James P. Gordon, and Herbert J. Zeiger at Columbia University in 1953. Townes, Nikolay Basov and Alexander Prokhorov were awarded the 1964 Nobel Prize in Physics for theoretical work leading to the maser. Masers are also used as the timekeeping device in atomic clocks, and as extremely low-noise microwave amplifiers in radio telescopes and deep-space spacecraft communication ground stations.

Modern masers can be designed to generate electromagnetic waves at not only microwave frequencies but also radio and infrared frequencies. For this reason, Townes suggested replacing microwave with the word molecular as the first word in the acronym maser.

The laser works by the same principle as the maser but produces higher frequency coherent radiation at visible wavelengths. The maser was the forerunner of the laser, inspiring theoretical work by Townes and Arthur Leonard Schawlow that led to the invention of the laser in 1960 by Theodore Maiman. When the coherent optical oscillator was first imagined in 1957, it was originally called the "optical maser". This was ultimately changed to laser for "Light Amplification by Stimulated Emission of Radiation". Gordon Gould is credited with creating this acronym in 1957.

Examples of use of MASER
1. Earlier in 1'60, two other scientists were the first to register patents for an optical maser,‘‘ but there was no functioning device to support the paper patent.
2. Earlier in 1'60, two other scientists were the first to register patents for an optical "maser," but there was no functioning device to support the paper patent.
3. This is the one that is not just bigger than the Nobel – it is worth 7'5,000 – but also more imprecise: it is awarded for "progress toward research or discoveries about spiritual realities". It went on Wednesday to the cosmological polymath John Barrow at Cambridge; last year it went to the American Charles Townes, who discovered the maser; the year before it went to the South African George Ellis, whose big research theme was the large–scale structure of space and time.