Antenna design and distribution of the LOFAR super station

Julien N. Girard; Philippe Zarka; Michel Tagger; Laurent Denis; Didier Charrier; Alexander A. Konovalenko; Frédéric Boone

doi:10.1016/j.crhy.2011.11.004

The next generation radiotelescopes / Les radiotélescopes du futur

Antenna design and distribution of the LOFAR super station
[Conception et distribution dʼantennes pour une super station LOFAR à Nançay]

Julien N. Girard ¹ ; Philippe Zarka ¹ ; Michel Tagger ² ; Laurent Denis ³ ; Didier Charrier ⁴ ; Alexander A. Konovalenko ⁵ ; Frédéric Boone ⁶

¹ Laboratoire dʼétudes spatiales et dʼinstrumentation en astrophysique (LESIA), observatoire de Paris, CNRS, UPMC, université Paris-Diderot, 5, place Jules-Janssen, 92190 Meudon, France
² Laboratoire de physique et chimie de lʼenvironnement et de lʼespace (LPC2E), université dʼOrléans, 3A, avenue de la recherche scientifique, 45071 Orléans cedex 2, France
³ Station de radioastronomie, observatoire de Paris, CNRS, route de Souesmes, 18330 Nançay, France
⁴ Laboratoire de physique subatomique et des technologies associées (SUBATECH), École des mines de Nantes, CNRS/IN2P3, université de Nantes, 4, rue Alfred-Kastler, La Chantrerie BP 20722, 44307 Nantes cedex 3, France
⁵ Institute of Radio Astronomy (IRA), National Academy of Sciences, 4, Krasnoznamennaya St., 61002 Kharkov, Ukraine
⁶ Institut de recherche en astrophysique et planétologie (IRAP), université Paul-Sabatier, CNRS, 9, avenue du Colonel Roche, BP 44346, 31028 Toulouse cedex 4, France

Comptes Rendus. Physique, The next generation radiotelescopes / Les radiotélescopes du futur, Volume 13 (2012) no. 1, pp. 33-37.

Résumé
Abstract

LʼObservatoire de Nançay et des laboratoires associés développent un concept de “Super Station” afin dʼétendre les capacités de lʼactuelle station LOFAR installée à Nançay. La Super Station LOFAR (LSS) augmentera le nombre de longues bases interférométriques sensibles, fournira de nouvelles bases courtes, formera un cœur alternatif à LOFAR et constituera un nouvel instrument autonome. Il opèrera dans la bande basse de LOFAR (15–80 MHz) et étendra cette bande à plus basses fréquences. Trois études clefs sont décrites ici : (i) La conception dʼantennes spécifiques, et leur distribution ; (ii) à petite échelle (dans un mini-réseau phasé analogique) ; et (iii) à grande échelle (réseau LSS).

The Nançay radio astronomy observatory and associated laboratories are developing the concept of a “Super Station” for extending the LOFAR station now installed and operational in Nançay. The LOFAR Super Station (LSS) will increase the number of high sensitivity long baselines, provide short baselines, act as an alternate core, and be a large standalone instrument. It will operate in the low frequency band of LOFAR (15–80 MHz) and extend this range to lower frequencies. Three key developments for the LSS are described here: (i) the design of a specific antenna, and the distribution of such antennas; (ii) at small-scale (analog-phased mini-array); and (iii) at large-scale (the whole LSS).

Publié le : 2011-12-10

DOI : 10.1016/j.crhy.2011.11.004

Keywords: Antennas, Phased array, Interferometer, Configurations, LOFAR
Mots-clés : Antennes, Réseaux phasés, Interféromètre, Configurations, LOFAR

Affiliations des auteurs :

Julien N. Girard ¹ ; Philippe Zarka ¹ ; Michel Tagger ² ; Laurent Denis ³ ; Didier Charrier ⁴ ; Alexander A. Konovalenko ⁵ ; Frédéric Boone ⁶

¹ Laboratoire dʼétudes spatiales et dʼinstrumentation en astrophysique (LESIA), observatoire de Paris, CNRS, UPMC, université Paris-Diderot, 5, place Jules-Janssen, 92190 Meudon, France
² Laboratoire de physique et chimie de lʼenvironnement et de lʼespace (LPC2E), université dʼOrléans, 3A, avenue de la recherche scientifique, 45071 Orléans cedex 2, France
³ Station de radioastronomie, observatoire de Paris, CNRS, route de Souesmes, 18330 Nançay, France
⁴ Laboratoire de physique subatomique et des technologies associées (SUBATECH), École des mines de Nantes, CNRS/IN2P3, université de Nantes, 4, rue Alfred-Kastler, La Chantrerie BP 20722, 44307 Nantes cedex 3, France
⁵ Institute of Radio Astronomy (IRA), National Academy of Sciences, 4, Krasnoznamennaya St., 61002 Kharkov, Ukraine
⁶ Institut de recherche en astrophysique et planétologie (IRAP), université Paul-Sabatier, CNRS, 9, avenue du Colonel Roche, BP 44346, 31028 Toulouse cedex 4, France

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     title = {Antenna design and distribution of the {LOFAR} super station},
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Julien N. Girard; Philippe Zarka; Michel Tagger; Laurent Denis; Didier Charrier; Alexander A. Konovalenko; Frédéric Boone. Antenna design and distribution of the LOFAR super station. Comptes Rendus. Physique, The next generation radiotelescopes / 
Les radiotélescopes du futur, Volume 13 (2012) no. 1, pp. 33-37. doi : 10.1016/j.crhy.2011.11.004. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2011.11.004/

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J. N. Girard; P. Zarka Towards optimal phased-array tile configurations for large new-generation radio telescopes and their application to NenuFAR, Astronomy Astrophysics, Volume 672 (2023), p. A80 | DOI:10.1051/0004-6361/202243861
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Francis J. Vasko; Eric Landquist; Gregory Kresge; Adam Tal; Yifeng Jiang; Xenophon Papademetris A simple and efficient strategy for solving very large‐scale generalized cable‐trench problems, Networks, Volume 67 (2016) no. 3, p. 199 | DOI:10.1002/net.21614
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J.N. Girard; H. Garsden; J.L. Starck; S. Corbel; A. Woiselle; C. Tasse; J.P. McKean; J. Bobin Sparse representations and convex optimization as tools for LOFAR radio interferometric imaging, Journal of Instrumentation, Volume 10 (2015) no. 08, p. C08013 | DOI:10.1088/1748-0221/10/08/c08013
Radioastronomy with LOFAR, Comptes Rendus. Physique, Volume 13 (2011) no. 1 | DOI:10.1016/j.crhy.2011.11.002
LOFAR calibration and wide-field imaging, Comptes Rendus. Physique, Volume 13 (2011) no. 1 | DOI:10.1016/j.crhy.2011.10.006

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