Year: 2022
Type: article
Abstract: In this paper we describe the design and characterization of the optical system of LSPE/Strip, a coherent polarimeter array that will observe the microwave sky from the Teide Observatory in Tenerife in two frequency bands centred at 43 and 95 GHz through a dual-reflector crossed-Dragone telescope of 1.5 m aperture. In general, optical systems composed by a telescope-feed array assembly have non-idealities that might limit their ability to perform high-precision measurements. It is thus necessary to understand, characterize and properly control these systematic effects. For this reason, we performed electromagnetic simulations to characterize angular resolution, sidelobes, main beam symmetry, polarization purity and feedhorns orientation. The results presented in this paper will be an essential input for further optical studies and for the LSPE/Strip data analysis. Ultimately, they will be used to assess the impact of optical systematic effects on the scientific results.
Source: Journal of Instrumentation
Institutions: University of Milan, Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Osservatorio di Astrofisica e Scienza dello Spazio, National Institute for Astrophysics, Politecnico di Torino, Institute of Electronics, Computer and Telecommunication Engineering, Universidad de La Laguna, Instituto de Astrofísica de Canarias, University of Oxford, Trieste Astronomical Observatory, University of Chile, Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca, University of Milano-Bicocca
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W3198745232