Baryon acoustic oscillations from Integrated Neutral Gas Observations: Broadband corrugated horn construction and testing

Autor: V. Liccardo, Luiz A. Reitano, Ian Browne, Giampaolo Pisano, Thyrso Villela, Filipe B. Abdalla, Bruno Maffei, Elcio Abdalla, Luciano Barosi, Carlos Alexandre Wuensche, Cesar Strauss, Frederico Vieira, Bin Wang, Christopher Radcliffe, Michael W. Peel, Eduardo J. de Mericia
Přispěvatelé: Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
POLARIZAÇÃO
Astrophysics::High Energy Astrophysical Phenomena
Radio telescope
FOS: Physical sciences
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
7. Clean energy
law.invention
Telescope
Optics
law
0103 physical sciences
Insertion loss
[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Radio astronomy
Polariser
Instrumentation and Methods for Astrophysics (astro-ph.IM)
010303 astronomy & astrophysics
Circular polarization
Astrophysics::Galaxy Astrophysics
Physics
010308 nuclear & particles physics
business.industry
Astrophysics::Instrumentation and Methods for Astrophysics
Astronomy and Astrophysics
Corrugated feed horn
Space and Planetary Science
Horn (acoustic)
Return loss
Baryon acoustic oscillations
business
Astrophysics - Instrumentation and Methods for Astrophysics
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Exper.Astron.
Exper.Astron., 2020, 50 (1), pp.125-144. ⟨10.1007/s10686-020-09666-9⟩
ISSN: 0922-6435
Popis: The Baryon acoustic oscillations from Integrated Neutral Gas Observations (BINGO) telescope is a 40-m~class radio telescope under construction that has been designed to measure the large-angular-scale intensity of HI emission at 980--1260 MHz and hence to constrain dark energy parameters. A large focal plane array comprising of 1.7-metre diameter, 4.3-metre length corrugated feed horns is required in order to optimally illuminate the telescope. Additionally, very clean beams with low sidelobes across a broad frequency range are required, in order to facilitate the separation of the faint HI emission from bright Galactic foreground emission. Using novel construction methods, a full-sized prototype horn has been assembled. It has an average insertion loss of around 0.15 dB across the band, with a return loss around -25 dB. The main beam is Gaussian with the first sidelobe at around $-25 dB. A septum polariser to separate the signal into the two hands of circular polarization has also been designed, built and tested.
This is a pre-print of an article published in Experimental Astronomy. The final authenticated version is available online at: https://doi.org/10.1007/s10686-020-09666-9
Databáze: OpenAIRE
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