Atacama Large Millimeter/ Submillimeter Array (ALMA)
Atacama Large Millimeter/Submillimeter Array (ALMA) consists of 66 high accuracy electrical wave antennas which is the largest ground based observatory at all times. It receives the electro-magnetic wave signals traveling in the universe ranged from 30GHz to 950GHz.Through the cross analysis of the received signals from different frequency bands in different combinations, the signals can be converted into video signals to discover the mysteries of the universe.
The antenna array is built high up in the Chilean Atacama at an altitude of 5000 meters. The antenna array system started working in 2013 and is expected to go on working for 50 years at least.
After researches and discussions with Academia Sinica Institute of Astronomy and Astrophysics (ASIAA) and National Astronomical Observatory of Japan (NAOJ), the ALMA-T East-Asia Front End Integration Center (EA-FEIC) was established in NCSIST. The receiver cartridges 6 different bands and electrical control modules were installed on the Front End Cryostat (-269℃) of the Antenna Receiver to perform the integration test. The integration tests of 26 sets of front end antenna receiver were completed on schedule. All components were passed the preliminary acceptance on-site test in Chile after delivering and using in the observation commissions.