Maser Amplifiers
نویسندگان
چکیده
منابع مشابه
Maser Theory
This review covers some of the developments in basic theory of astronomical masers over the past ten years. Topics included are the effects of three dimensional geometry and polarization, with special emphasis on the differences between maser and non-maser radiation. 1. Maser Absorption Coefficient in Three Dimensions The absorption coefficient κ describes the coupling between particles and rad...
متن کاملPolarized maser growth.
A polarized maser is assumed to operate in an anisotropic medium with natural modes polarized differently to the maser. It is shown that when the spatial growth rate and the generalized Faraday rotation rate are comparable, the polarization of the growing radiation is different from those of the maser and medium. In particular, for a lineary polarized maser operating in a medium with linearly p...
متن کاملThe electron cyclotron maser
The electron cyclotron maser (ECM) is based on a stimulated cyclotron emission process involving energetic electrons in gyrational motion. It constitutes a cornerstone of relativistic electronics, a discipline that has emerged from our understanding and utilization of relativistic effects for the generation of coherent radiation from free electrons. Over a span of four decades, the ECM has unde...
متن کاملRecent Developments in Maser Theory
This review covers selected developments in maser theory since the previous meeting, Cosmic Masers: From Proto-Stars to Black Holes (Migenes & Reid 2002). Topics included are time variability of fundamental constants, pumping of OH megamasers and indicators for differentiating disks from bi-directional outflows.
متن کاملMaser studies in evolved stars
High resolution maps of maser emission provide very detailed information on processes occurring in circumstellar envelopes of late-type stars. A particularly detailed picture of the innermost shells around AGB stars is provided by SiO masers. Considerable progress is being made to provide astrometrically aligned multi-transition simultaneous observations of these masers, which are needed to bet...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1980
ISSN: 0074-1809
DOI: 10.1017/s007418090007337x