The new multi-frequency instrument (MFI2) for the QUIJOTE facility in Tenerife
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URI: https://hdl.handle.net/10902/28048DOI: 10.1117/12.2640826
ISSN: 0277-786X
ISSN: 1996-756X
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Hoyland, Roger J.; Rubiño Martín, José Alberto; Aguiar González, Marta; Alonso Arias, Paz; Artal Latorre, Eduardo; Ashdown, Mark; Barreiro Vilas, Rita Belén; Casas Reinares, Francisco Javier; Colodro Conde, Carlos; Hoz López-Collado, Elena de la; Fernández Torreiro, Mateo; Fuerte Rodríguez, Pablo Alberto; Génova Santos, Ricardo Tanausú; Gómez Reñasco, María Francisca; González Carretero, Eduardo David; González González, Raúl; Guidi, Federica; Hernández Monteagudo, Carlos; Herranz Muñoz, Diego; [et al.]Fecha
2022-08-31Derechos
© 2022 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Publicado en
Proceedings of SPIE, 2022, 12190, 1219033
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI, Montreal, Quebec, 2022
Editorial
SPIE Society of Photo-Optical Instrumentation Engineers
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Palabras clave
CMB
Polarimeter
FPGA
Early Universe
Microwaves
Telescopes
Instrumentation
Cryogenics
Direct digital conversion
Resumen/Abstract
The QUIJOTE (Q-U-I joint Tenerife) experiment combines the operation of two radio-telescopes and three instruments working in the microwave bands 10?20 GHz, 26-36 GHz and 35-47 GHz at the Teide Observatory, Tenerife, and has already been presented in previous SPIE meetings (Hoyland, R. J. et al, 2012; Rubiño-Martín et al., 2012). The Cosmology group at the IAC have designed a new upgrade to the MFI instrument in the band 10-20 GHz. The aim of the QUIJOTE telescopes is to characterise the polarised emission of the cosmic microwave background (CMB), as well as galactic and extra-galactic sources, at medium and large angular scales. This MFI2 will continue the survey at even higher sensitivity levels. The MFI2 project led by the Instituto de Astrofísica de Canarias (IAC) consists of five polarimeters, three of them operating in the sub-band 10?15 GHz, and two in the sub-band 15-20 GHz. The MFI2 instrument is expected to be a full two-three times more sensitive than the former MFI. The microwave complex correlator design has been replaced by a simple correlator design with a digital back-end based on the latest Xilinx FPGAs (ZCU111). During the first half of 2019 the manufacture of the new cryostat was completed and since then the opto-mechanical components have been designed and manufactured. It is expected that the cryogenic front-end will be completed by the end of 2022 along with the FPGA acquisition and observing system. This digital system has been employed to be more robust against stray ground-based and satellite interference, having a frequency resolution of 1 MHz.
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