page_title: Arcminute Microkelvin Imager
section_title: AMI Small Array
hierarchical_section_title: Arcminute Microkelvin Imager / AMI Small Array
caption_attribution_description: English: The Arcminute Microkelvin Imager Small Array at the Mullard Radio Astronomy Observatory, Cambridgeshire in June 2014.
context_page_description: The Arcminute Microkelvin Imager consists of a pair of interferometric radio telescopes - the Small and Large Arrays - located at the Mullard Radio Astronomy Observatory near Cambridge. AMI was designed, built and is operated by the Cavendish Astrophysics Group. AMI was designed, primarily, for the study of galaxy clusters by observing secondary anisotropies in the cosmic microwave background arising from the Sunyaev–Zel'dovich effect. Both arrays are used to observe radiation with frequencies between 12 and 18 GHz, and have very similar system designs. The telescopes are used to observe both previously known galaxy clusters, in an attempt to determine, for example, their masses and temperatures, and to carry out surveys, in order to locate previously undiscovered clusters.
context_section_description: The AMI Small Array (AMI SA) consists of 10 3.7-m-diameter antennas, similar in design to those of the LA.  They are arranged at intervals of between 5 and 20 m.  The SA has an angular resolution of approximately 3 arcminutes and is used to image, at high resolution, the galaxy clusters of interest.  The SA is being used to search for previously unknown galaxy clusters; results from the first such cluster, detected using AMI, were released in December 2010.  In addition to observations of galaxy clusters, the SA has been used to carry out observations, amongst other things, towards supernova remnants and anomalous microwave emission.
caption: AMI Small Array in June 2014
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