Publication

Design of an optical beam combiner for dual band observation with ALMA

Montofré, D., Baryshev, A., Mena, F. P. & Hesperi, R., 13-Nov-2017, 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017. Institute of Electrical and Electronics Engineers Inc., p. 1-3 4 p.

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  • Design of an optical beam combiner for dual band observation with ALMA

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DOI

The aim of this work is to improve high-frequency calibration data on long baseline observations for the ALMA antennas. A dual-frequency atmospheric phase error calibration method is proposed and will be implemented by the simultaneous observation in two ALMA Bands, specifically 6 and 9, coupled by means external optics in a few baselines. This method is envisioned to demonstrate the advantage of receiving signals simultaneously at different frequencies from the same point of the sky. It will permit an increase of accuracy in determining the phase correction needed to reduce the effects of the atmosphere. While maintaining the existing receiver optics, an optical layout that couples Bands 6 and 9 is proposed. Here we demonstrate that very limited impact on the existing ALMA system is needed. Furthermore, we present in detail the optical layout, made within the formalism of ray optics, and a detailed tolerance analysis. The initial results demonstrate the feasibility of the proposed system.

Original languageEnglish
Title of host publication2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-3
Number of pages4
ISBN (Electronic)9789082598704
Publication statusPublished - 13-Nov-2017
Event32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017 - Montreal, Canada
Duration: 19-Aug-201726-Aug-2017

Conference

Conference32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
CountryCanada
CityMontreal
Period19/08/201726/08/2017

Event

32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017

19/08/201726/08/2017

Montreal, Canada

Event: Conference

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ID: 108034029