10 receivers inside an ALMA cryostat

This image shows the cryostat of an Atacama Large Millimeter/submillimeter Array (ALMA) antenna populated with 10 receivers for the first time. The receivers pick up the signals from outer space at specific frequency bands, covering a window from 950 to 35 GHz, and are stored in a cryostat that cools them down to temperatures as low as -269°C. The installation of the "Band 2" receivers, initiated in 2023, means ALMA antennas can observe within the final frequency range (67 to 116 GHs) for which the array was designed.