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Proceedings Paper

Design of the optical system for ALMA band 1
Author(s): Nicolás Reyes; Valeria Tapia; Doug Henke; Miguel Sanchez-Carrasco; F. Patricio Mena; Stéphane M. X. Claude; Leonardo Bronfman
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Paper Abstract

This work presents a complete study of the optical system for ALMA band 1, which covers the frequency range from 35 to 50 GHz, with the goal of extending the coverage up to 52GHz. Several options have been explored to comply with the stringent technical specifications, restrictions, and cost constraints. The best solution consists of a corrugated zoned lens, two infrared filters and a spline profiled corrugated horn. The calculated aperture efficiency is better than 75%, while the average noise contribution is lower than 10.3 K. The first prototypes of the system have been constructed and first evaluation results available.

Paper Details

Date Published: 22 July 2014
PDF: 8 pages
Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 91451W (22 July 2014); doi: 10.1117/12.2055170
Show Author Affiliations
Nicolás Reyes, Univ. de Chile (Chile)
Max-Planck-Institut für Radioastronomie (Germany)
Valeria Tapia, Univ. de Chile (Chile)
Doug Henke, NRC - Herzburg Institute of Astrophysics (Canada)
Miguel Sanchez-Carrasco, Univ. de Chile (Chile) and Instituto de Astrofísica de Andalucía - CSIC (Spain)
F. Patricio Mena, Univ. de Chile (Chile)
Stéphane M. X. Claude, NRC - Herzburg Institute of Astrophysics (Canada)
Leonardo Bronfman, Univ. de Chile (Chile)

Published in SPIE Proceedings Vol. 9145:
Ground-based and Airborne Telescopes V
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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