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Arcminute Microkelvin Imager
The long baseline array of AMI, utilizing antennas from the Ryle Telescope. The telescopes have been re-positioned since this photo was taken.
Location:	Mullard Radio Astronomy Observatory, Cambridge (UK)
Wavelength:	12-18 GHz
Built:	2003-2005
Website:	AMI website

The Arcminute Microkelvin Imager (AMI) is an interferometer radio telescope designed principally to image secondary anisotropies in the cosmic microwave background (CMB) at higher angular resolution than the Very Small Array. It consists of two interferometric arrays sited at the Mullard Radio Astronomy Observatory in Cambridge (UK), both operating in the frequency range 12-18 GHz. The short baseline array consists of ten 3.7-m parabolic antennas while the long-baseline array is composed of seven 13m antennas. The larger 13m antennas are currently being upgraded with new receivers.

The main goals of the project are to carry out a survey of clusters of galaxies via the Sunyaev-Zel'dovich effect (the scattering of the CMB off gas in the cluster), with follow-up observations at other wavelengths, and to do pointed observations of individual clusters. AMI will also make very high resolution observations of the primordial CMB power spectrum.

The resulting catalogue of galaxy clusters could shed light on the nature of dark energy (thought to account for about 70% of the energy density of the Universe). Full survey observations commenced after commissioning observations in August 2005, which mapped the cluster plasma in Abell 1914.

• South Pole Telescope
• Sunyaev-Zel'dovich Array

• AMI Collaboration. "High-significance Sunyaev-Zel'dovich measurement: Abell 1914 seen with the Arcminute Microkelvin Imager". Monthly Notices of the Royal Astronomical Society: Letters 369: L1. DOI:10.1111/j.1745-3933.2006.00151.x. arXiv:astro-ph/0509215. 
• Arcminute MicroKelvin Imager official page. Retrieved on 2006-10-18.
• Arcminute Microkelvin Imager unofficial webpage. Retrieved on 2006-10-18.

• Jones, Michael (2001). "SZ surveys with the Arcminute MicroKelvin Imager". arXiv:astro-ph/0109351. 
• Kneissl, Rüdiger; et al. (2001). "Surveying the sky with the Arcminute MicroKelvin Imager: expected constraints on galaxy cluster evolution and cosmology". MNRAS 328: 783. arXiv:astro-ph/0103042.