The Atacama Large Millimeter/sub-millimeter Array band-1 receiver

Abstract

The Atacama Large Millimeter/submillimeter Array(ALMA) Band 1 receiver covers the 35-50 GHz frequency band. Development of prototype receivers, including the key components and subsystems has been completed and two sets of prototype receivers were fully tested. We will provide an overview of the ALMA Band 1 science goals, and its requirements and design for use on the ALMA. The receiver development status will also be discussed and the infrastructure, integration, evaluation of fully-assembled band 1 receiver system will be covered. Finally, a discussion of the technical and management challenges encountered will be presented.

From Clusters to Proto-Clusters: The Infrared Perspective on Environmental Galaxy Evolution

“…This could suggest that using a larger ratio of the CO line brightness temperatures (e.g., r 21 = L CO(2−1) /L CO(1−0) ) might be more appropriate for these high-redshift cluster galaxies, which would bring down the gas fractions when estimated from higher-order rotational transitions (see also Section 6.1.1). The current ALMA receiver bands only permit CO (1 − 0) to be observed up to z ∼ 0.35; however, this will change with the full installment of receiver Band 1 over 35-50 GHz [694] which recently had a successful first light run and will enable sensitive observations of CO (1 − 0) out to z ∼ 2 in a reasonable integration time and permit studies of environmentally dependencies on CO excitation.…”

Measuring Magnetic Field With Atacama Large Millimeter/Submillimeter Array

“…Currently, ALMA antennas are equipped with eight receivers, covering the range of wavelengths from 0.3 mm (Band 10, 950 GHz) to 3.6 mm (Band 3, 84 GHz). Two receivers for longer wavelengths are planned to be added, with one receiver up to 8.6 mm (Band 1, 35 GHz, Huang et al, 2016Huang et al, , 2018 being in construction, and the second one, for the wavelengths up to 4.6 mm (Band 2, 67-116 GHz, Yagoubov et al, 2020), being under development. The array is reconfigurable in multiple patterns (configurations) ranging in size from 150 m (compact) up to 16 km (extended), depending on the required sensitivity and spatial resolution.…”

Bayesian and Machine Learning Methods in the Big Data Era for Astronomical Imaging

“…ALMA is undergoing further developments to boost the full operation capabilities. In the near future, the ALMA band 1 [3] and band 2 [4] will be installed on each antenna broadening the receiver bandwidth to cover a total wavelength range of 8.5-0.32 mm (35-950 GHz). Moreover, the ALMA2030 Development Roadmap [5] has been approved to keep ALMA as a world-leading facility.…”