http://www.cnr.it/ontology/cnr/individuo/prodotto/ID175446

Planck-LFI: design and performance of the 4 Kelvin Reference Load Unit (Articolo in rivista)

Type

Label

Planck-LFI: design and performance of the 4 Kelvin Reference Load Unit (Articolo in rivista) (literal)

Anno

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

Alternative label

L Valenziano (a); F Cuttaia (a); A De Rosa (a); L Terenzi (a); A Brighenti (a); G P Cazzola (a); A Garbesi (b); S Mariotti (c); G Orsi (a); L Pagan (e); F Cavaliere (f); M Biggi (d); R Lapini (d); E Panagin (d); P Battaglia (d); R C Butler (a); M Bersanelli (f); O D'Arcangelo (g); S Levin (h); N Mandolesi (a); A Mennella (f); G Morgante (a); G Morigi (a); M Sandri (a); A Simonetto (g); M Tomasi (i); F Villa (a); M Frailis (j); S Galeotta (k); A Gregorio (j,k); R Leonardi (l); S R Lowe (m); M Maris (j); P Meinhold (l); L Mendes (n); L Stringhetti (a); A Zonca (i); A Zacchei (j) (2009)
Planck-LFI: design and performance of the 4 Kelvin Reference Load Unit
in Journal of instrumentation; IOP Publishing Ltd. (Institute of Physics Publishing Ltd), "Bristol ; London" (Regno Unito); SISSA (SISSA Medialab), Trieste (Italia)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

L Valenziano (a); F Cuttaia (a); A De Rosa (a); L Terenzi (a); A Brighenti (a); G P Cazzola (a); A Garbesi (b); S Mariotti (c); G Orsi (a); L Pagan (e); F Cavaliere (f); M Biggi (d); R Lapini (d); E Panagin (d); P Battaglia (d); R C Butler (a); M Bersanelli (f); O D'Arcangelo (g); S Levin (h); N Mandolesi (a); A Mennella (f); G Morgante (a); G Morigi (a); M Sandri (a); A Simonetto (g); M Tomasi (i); F Villa (a); M Frailis (j); S Galeotta (k); A Gregorio (j,k); R Leonardi (l); S R Lowe (m); M Maris (j); P Meinhold (l); L Mendes (n); L Stringhetti (a); A Zonca (i); A Zacchei (j) (literal)

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a Istituto di Astrofisica Spaziale e Fisica Cosmica - Bologna, INAF, via P. Gobetti 101, 40129 Bologna, Italy b Istituto per la Sintesi Organica e la Fotoreattività, CNR, via P. Gobetti 101, 40129 Bologna, Italy c Istituto di Radioastronomia, INAF, via P. Gobetti 101, 40129 Bologna, Italy d Officine Pasquali, via Palazzo de' Diavoli 124B, 50142 Firenze, Italy e Thales Alenia Space Italia, Sede di Milano, S.S. Padana Superiore 290, 20090 Vimodrone, Italy f Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy g Istituto di Fisica del Plasma, CNR, Via Roberto Cozzi 53, 20125 Milano, Italy h Jet Propulsion Laboratory, 4800 Oak Grove Drive, CA91109 Pasadena, USA i Istituto di Astrofisica Spaziale e Fisica Cosmica - Milano, INAF, via E. Bassini 15, 20133 Milano, Italy j Osservatorio Astronomico di Treste, INAF, via G.B. Tiepolo 11, 34143 Trieste, Italy k Università degli studi di Trieste, Dipartimento di Fisica, via A. Valerio 2, 34127 Trieste, Italy l Department of Physics, University of California, Santa Barbara 2225 Broida Hall CA 93106 Santa Barbara, USA m Jodrell Bank Centre for Astrophysics, Alan Turing Building, The University of Manchester, Manchester, M13 9PL, UK n ESA - European Space Agency, Keplerlaan 1, NL 2200 AG Noordwijk, The Netherlands (literal)

Titolo

Planck-LFI: design and performance of the 4 Kelvin Reference Load Unit (literal)

Abstract

The LFI radiometers use a pseudo-correlation design where the signal from the sky is continuously compared with a stable reference signal, provided by a cryogenic reference load system. The reference unit is composed by small pyramidal horns, one for each radiometer, 22 in total, facing small absorbing targets, made of a commercial resin ECCOSORB CRTM, cooled to \"4.5 K. Horns and targets are separated by a small gap to allow thermal decoupling. Target and horn design is optimized for each of the LFI bands, centered at 70, 44 and 30 GHz. Pyramidal horns are either machined inside the radiometer 20K module or connected via external electroformed bended waveguides. The requirement of high stability of the reference signal imposed a careful design for the radiometric and thermal properties of the loads. Materials used for the manufacturing have been characterized for thermal, RF and mechanical properties. We describe in this paper the design and the performance of the reference system. (literal)

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