翻訳と辞書 Words near each other ・ Atabeg ・ Atabegs of Yazd ・ Atabey ・ Atabey (goddess) ・ Atabey Çiçek ・ Atabkashmas Owliad ・ Atabu ・ Atabəy ・ ATAC ・ Atac ・ ATAC SpA ・ ATAC-seq ・ Atacadão ・ Atacalco Sul Airport ・ Atacama (disambiguation) ・ Atacama B-Mode Search ・ Atacama border dispute ・ Atacama Cosmology Telescope ・ Atacama Department ・ Atacama Desert ・ Atacama Fault ・ Atacama Giant ・ Atacama Large Millimeter Array ・ Atacama myotis ・ Atacama Pathfinder Experiment ・ Atacama people ・ Atacama Province ・ Atacama Province, Chile ・ Atacama Region ・ Atacama skeleton Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Atacama B-Mode Search ： ウィキペディア英語版 Atacama B-Mode Search The Atacama B-Mode Search (ABS) is an ongoing experiment to test the theory of cosmic inflation and distinguish between inflationary models of the very early universe by making precise measurements of the polarization of the Cosmic Microwave Background (CMB). ABS is located at a high-altitude site in the Atacama Desert of Chile as part of the Parque Astronómico de Atacama.〔 ABS began observations in February 2012, and is currently in its third season of observations. == Instrument == The ABS telescope images the sky at a frequency of 145 GHz (2 mm wavelength), in the microwave region of the electromagnetic spectrum, where the CMB emission is at its maximum. It is sensitive to both the intensity and polarization of the CMB. The CMB is expected to be weakly polarized, and the ABS instrument is designed to measure this very faint signal. The camera consists of 240 polarization-sensitive pixels, with two transition-edge-sensor (TES) bolometers per pixel. This TES array is cooled to a temperature of 0.3 Kelvin to reduce thermal noise in the detectors.〔 The optics consist of two 60-cm mirrors that are kept at a temperature of 4 K. The high-altitude site, at 5200 meters above sea level, in a very dry climate reduces loading from the atmosphere, since water vapor has strong emission at these frequencies. Nearby sites have been chosen by other observatories for the same reason, including CBI, ASTE, Nanten, APEX, ALMA, ACT, and POLARBEAR. The ABS experiment was designed for rapid deployment by being built in North America into a standard shipping container. Upon arrival in Chile, the telescope was raised out of a special hatch in the roof of the shipping container for observations. Compared to other similar experiments, ABS is unique in using an ambient-temperature half-wave plate to quickly modulate incoming polarization.〔 This allows the instrument to "lock in" to the polarized signal of interest and reject the atmosphere, which is largely unpolarized. 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Atacama B-Mode Search」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.