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ALMA: status of construction and the initial observations

Authors:
Tetsuo Hasegawa
Abstract:
The progress of the construction of the Atacama Large Millimeter/submillimeter Array (ALMA), an international partnership of Europe, North America and East Asia in cooperation with the Republic of Chile, is presented.ALMA will be composed of 66 antenna elements, which are grouped into an array of fifty 12-m antennas (the 12-mArray) and an array of twelve 7-m antennas plus four 12-m antennas (the Atacama Compact Array = ACA). Each antenna is equipped with a 10-band receiver front end designed to cover all atmospheric windows from 30 to 950 GHz (we initially equip with seven bands on all antennas and another band for selected antennas). The construction of ALMA is well advanced with all the subsystems in quantity production, with many items already competed its production. These subsystems are transported to Chile and are being integrated as antenna elements and verified at the ALMA Operations Support Facility (OSF) at an altitude of 2,900 meters.
Categories:
ALMA
Year:
2012
Session:
4
Full-text:
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Page Number(s):
18