Masers
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 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 …
WikipediaPublications
UNFCCC: United Nations Framework Convention on Climate Change · 4 August 2023 English
CommiSee which would fast track endorsement on maSers related to climate and disaster including policies …
UKRI: UK Research and Innovation · 29 June 2023 English
The QEPNT Hub will create the community and ecosystem and the technologies required for the UK to be a global leader in future PNT systems. [...] Many of the key …
quantum-limited amplifiers, squeezed states and enhanced MASERs (microwave amplification by stimulated emission …
APS: American Physical Society · 2023 English
Cepheids and other well-characterized objects, such as masers and type 1a supernovae, to measure cosmic distances …
APS: American Physical Society · 2023 English
frequencies (masers)—and other sources of coherent microwaves—could be very useful. But even though masers were …
APS: American Physical Society · 2023 English
[99] J. Bovy, D. W. Hogg, and H.-W. Rix, Galactic masers and the Milky Way circular velocity, Astrophys …
APS: American Physical Society · 2023 English
environmental perturbations than, for in- stance, hydrogen masers [128], making it challenging to construct a reliable …
APS: American Physical Society · 2023 English
with separated oscillatory fields and hydrogen masers, Rev. Mod. Phys. 62, 541 (1990). [41] A. C. Vutha …
APS: American Physical Society · 2022 English
amplify weak signals by engineering spin-based masers [42,43], with applications in dark matter searches … integrate our mixer and sensor with well-developed masers [42,43,88] to greatly enhance the sensitivity and …
APS: American Physical Society · 2022 English
[67], the frequency ratio between the two remote H masers was obtained by combining the transfer oscillator … Fountain data, representing measurements of the H masers with the local microwave clocks, were sam- pled … possible to extrapolate over dead time by using the H masers as flywheels [41,71,72] increasing the measurement …
APS: American Physical Society · 2022 English
D. Scovil and E. O. Schulz-DuBois, Three-Level Masers as Heat Engines, Phys. Rev. Lett. 2, 262 (1959) … Mazets, M. O. Scully, and G. Kurizki, Two-level masers as heat-to-work converters, Proc. Natl. Acad. Sci …
