Planck-LFI radiometers’ spectral response

A. Zonca, C. Franceschet, P. Battaglia, F. Villa, A. Mennella, O. D`Arcangelo, R. Silvestri, M. Bersanelli, E. Artal, R.C. Butler, F. Cuttaia, R.J. Davis, S. Galeotta, N. Hughes, P. Jukkala, V-H. Kilpiä, M. Laaninen, N. Mandolesi, M. Maris, L. Mendes & 5 others M. Sandri, L. Terenzi, Jussi Tuovinen, Jussi Varis, A. Wilkinson

Research output: Contribution to journalArticleScientificpeer-review

17 Citations (Scopus)

Abstract

The Low Frequency Instrument (LFI) is an array of pseudo-correlation radiometers on board the Planck satellite, the ESA mission dedicated to precision measurements of the Cosmic Microwave Background. The LFI covers three bands centred at 30, 44 and 70 GHz, with a goal bandwidth of 20% of the central frequency. The characterization of the broadband frequency response of each radiometer is necessary to understand and correct for systematic effects, particularly those related to foreground residuals and polarization measurements. In this paper we present the measured band shape of all the LFI channels and discuss the methods adopted for their estimation. The spectral characterization of each radiometer was obtained by combining the measured spectral response of individual units through a dedicated RF model of the LFI receiver scheme. As a consistency check, we also attempted end-to-end spectral measurements of the integrated radiometer chain in a cryogenic chamber. However, due to systematic effects in the measurement setup, only qualitative results were obtained from these tests. The measured LFI bandpasses exhibit a moderate level of ripple, compatible with the instrument scientific requirements.
Original languageEnglish
Article numberT12010
JournalJournal of Instrumentation
Volume4
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed

Fingerprint

Spectral Response
Radiometer
Radiometers
radiometers
spectral sensitivity
Low Frequency
low frequencies
instrument receivers
European Space Agency
ripples
frequency response
Ripple
cryogenics
Frequency Response
Cryogenics
Broadband
chambers
Microwave
Frequency response
broadband

Keywords

  • Spectral responses
  • Space instrumentation
  • Microwave radiometers
  • Instruments for CMB observations

Cite this

Zonca, A., Franceschet, C., Battaglia, P., Villa, F., Mennella, A., D`Arcangelo, O., ... Wilkinson, A. (2009). Planck-LFI radiometers’ spectral response. Journal of Instrumentation, 4, [T12010]. https://doi.org/10.1088/1748-0221/4/12/T12010
Zonca, A. ; Franceschet, C. ; Battaglia, P. ; Villa, F. ; Mennella, A. ; D`Arcangelo, O. ; Silvestri, R. ; Bersanelli, M. ; Artal, E. ; Butler, R.C. ; Cuttaia, F. ; Davis, R.J. ; Galeotta, S. ; Hughes, N. ; Jukkala, P. ; Kilpiä, V-H. ; Laaninen, M. ; Mandolesi, N. ; Maris, M. ; Mendes, L. ; Sandri, M. ; Terenzi, L. ; Tuovinen, Jussi ; Varis, Jussi ; Wilkinson, A. / Planck-LFI radiometers’ spectral response. In: Journal of Instrumentation. 2009 ; Vol. 4.
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title = "Planck-LFI radiometers’ spectral response",
abstract = "The Low Frequency Instrument (LFI) is an array of pseudo-correlation radiometers on board the Planck satellite, the ESA mission dedicated to precision measurements of the Cosmic Microwave Background. The LFI covers three bands centred at 30, 44 and 70 GHz, with a goal bandwidth of 20{\%} of the central frequency. The characterization of the broadband frequency response of each radiometer is necessary to understand and correct for systematic effects, particularly those related to foreground residuals and polarization measurements. In this paper we present the measured band shape of all the LFI channels and discuss the methods adopted for their estimation. The spectral characterization of each radiometer was obtained by combining the measured spectral response of individual units through a dedicated RF model of the LFI receiver scheme. As a consistency check, we also attempted end-to-end spectral measurements of the integrated radiometer chain in a cryogenic chamber. However, due to systematic effects in the measurement setup, only qualitative results were obtained from these tests. The measured LFI bandpasses exhibit a moderate level of ripple, compatible with the instrument scientific requirements.",
keywords = "Spectral responses, Space instrumentation, Microwave radiometers, Instruments for CMB observations",
author = "A. Zonca and C. Franceschet and P. Battaglia and F. Villa and A. Mennella and O. D`Arcangelo and R. Silvestri and M. Bersanelli and E. Artal and R.C. Butler and F. Cuttaia and R.J. Davis and S. Galeotta and N. Hughes and P. Jukkala and V-H. Kilpi{\"a} and M. Laaninen and N. Mandolesi and M. Maris and L. Mendes and M. Sandri and L. Terenzi and Jussi Tuovinen and Jussi Varis and A. Wilkinson",
note = "Project code: 18080",
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doi = "10.1088/1748-0221/4/12/T12010",
language = "English",
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journal = "Journal of Instrumentation",
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Zonca, A, Franceschet, C, Battaglia, P, Villa, F, Mennella, A, D`Arcangelo, O, Silvestri, R, Bersanelli, M, Artal, E, Butler, RC, Cuttaia, F, Davis, RJ, Galeotta, S, Hughes, N, Jukkala, P, Kilpiä, V-H, Laaninen, M, Mandolesi, N, Maris, M, Mendes, L, Sandri, M, Terenzi, L, Tuovinen, J, Varis, J & Wilkinson, A 2009, 'Planck-LFI radiometers’ spectral response', Journal of Instrumentation, vol. 4, T12010. https://doi.org/10.1088/1748-0221/4/12/T12010

Planck-LFI radiometers’ spectral response. / Zonca, A.; Franceschet, C.; Battaglia, P.; Villa, F.; Mennella, A.; D`Arcangelo, O.; Silvestri, R.; Bersanelli, M.; Artal, E.; Butler, R.C.; Cuttaia, F.; Davis, R.J.; Galeotta, S.; Hughes, N.; Jukkala, P.; Kilpiä, V-H.; Laaninen, M.; Mandolesi, N.; Maris, M.; Mendes, L.; Sandri, M.; Terenzi, L.; Tuovinen, Jussi; Varis, Jussi; Wilkinson, A.

In: Journal of Instrumentation, Vol. 4, T12010, 2009.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Planck-LFI radiometers’ spectral response

AU - Zonca, A.

AU - Franceschet, C.

AU - Battaglia, P.

AU - Villa, F.

AU - Mennella, A.

AU - D`Arcangelo, O.

AU - Silvestri, R.

AU - Bersanelli, M.

AU - Artal, E.

AU - Butler, R.C.

AU - Cuttaia, F.

AU - Davis, R.J.

AU - Galeotta, S.

AU - Hughes, N.

AU - Jukkala, P.

AU - Kilpiä, V-H.

AU - Laaninen, M.

AU - Mandolesi, N.

AU - Maris, M.

AU - Mendes, L.

AU - Sandri, M.

AU - Terenzi, L.

AU - Tuovinen, Jussi

AU - Varis, Jussi

AU - Wilkinson, A.

N1 - Project code: 18080

PY - 2009

Y1 - 2009

N2 - The Low Frequency Instrument (LFI) is an array of pseudo-correlation radiometers on board the Planck satellite, the ESA mission dedicated to precision measurements of the Cosmic Microwave Background. The LFI covers three bands centred at 30, 44 and 70 GHz, with a goal bandwidth of 20% of the central frequency. The characterization of the broadband frequency response of each radiometer is necessary to understand and correct for systematic effects, particularly those related to foreground residuals and polarization measurements. In this paper we present the measured band shape of all the LFI channels and discuss the methods adopted for their estimation. The spectral characterization of each radiometer was obtained by combining the measured spectral response of individual units through a dedicated RF model of the LFI receiver scheme. As a consistency check, we also attempted end-to-end spectral measurements of the integrated radiometer chain in a cryogenic chamber. However, due to systematic effects in the measurement setup, only qualitative results were obtained from these tests. The measured LFI bandpasses exhibit a moderate level of ripple, compatible with the instrument scientific requirements.

AB - The Low Frequency Instrument (LFI) is an array of pseudo-correlation radiometers on board the Planck satellite, the ESA mission dedicated to precision measurements of the Cosmic Microwave Background. The LFI covers three bands centred at 30, 44 and 70 GHz, with a goal bandwidth of 20% of the central frequency. The characterization of the broadband frequency response of each radiometer is necessary to understand and correct for systematic effects, particularly those related to foreground residuals and polarization measurements. In this paper we present the measured band shape of all the LFI channels and discuss the methods adopted for their estimation. The spectral characterization of each radiometer was obtained by combining the measured spectral response of individual units through a dedicated RF model of the LFI receiver scheme. As a consistency check, we also attempted end-to-end spectral measurements of the integrated radiometer chain in a cryogenic chamber. However, due to systematic effects in the measurement setup, only qualitative results were obtained from these tests. The measured LFI bandpasses exhibit a moderate level of ripple, compatible with the instrument scientific requirements.

KW - Spectral responses

KW - Space instrumentation

KW - Microwave radiometers

KW - Instruments for CMB observations

U2 - 10.1088/1748-0221/4/12/T12010

DO - 10.1088/1748-0221/4/12/T12010

M3 - Article

VL - 4

JO - Journal of Instrumentation

JF - Journal of Instrumentation

SN - 1748-0221

M1 - T12010

ER -

Zonca A, Franceschet C, Battaglia P, Villa F, Mennella A, D`Arcangelo O et al. Planck-LFI radiometers’ spectral response. Journal of Instrumentation. 2009;4. T12010. https://doi.org/10.1088/1748-0221/4/12/T12010