Design of an optical beam combiner for dual-frequency observation with ALMAMontofrÉ, D., Baryshev, A., Hesper, R. & Mena, F. P., Mar-2017.
Research output: Contribution to conference › Paper › Academic
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 and, therefore, it will enable higher resolutions when imaging at high frequencies using the ALMA interferometer. 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. The initial results demonstrate the feasibility of the proposed system.
|Publication status||Published - Mar-2017|
|Event||28th International Symposium on Space Terahertz Technology, ISSTT 2017 - Cologne, Germany|
Duration: 13-Mar-2017 → 15-Mar-2017
|Conference||28th International Symposium on Space Terahertz Technology, ISSTT 2017|
|Period||13/03/2017 → 15/03/2017|
28th International Symposium on Space Terahertz Technology, ISSTT 2017
13/03/2017 → 15/03/2017Cologne, Germany