The Atacama Large Millimeter/submillimeter Array

Abstract

The Atacama Large Millimeter/submillimeter Array (ALMA) is an international radio telescope under construction in the Atacama Desert of northern Chile. ALMA is situated on a dry site at 5000 m elevation, allowing excellent atmospheric transmission over the instrument wavelength range of 0.3 to 10 mm. ALMA will consist of two arrays of high-precision antennas. One, of up to 64 12-m diameter antennas, is reconfigurable in multiple patterns ranging in size from 150 meters up to ~15 km. A second array is comprised of a set of four 12-m and twelve 7-m antennas operating in one of two closely packed configurations ~50 m in diameter. The instrument will provide both interferometric and total-power astronomical information on atomic, molecular and ionized gas and dust in the solar system, our Galaxy, and the nearby to high-redshift universe. In this paper we outline the scientific drivers, technical challenges and planned progress of ALMA.

to be published in Proceedings of the IEEE special issue on radiotelescopes

References in corpus (3)

• Evaluation of the ALMA Prototype Antennas
• Study of the Dynamics of Large Reflector Antennas with Accelerometers
• Scientific requirements of ALMA, and its capabilities for key-projects: Extragalactic

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