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. MendesM. 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.
    @article{ac41b8987b2f48a4b8538ac467bf8315,
    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",
    year = "2009",
    doi = "10.1088/1748-0221/4/12/T12010",
    language = "English",
    volume = "4",
    journal = "Journal of Instrumentation",
    issn = "1748-0221",
    publisher = "Institute of Physics IOP",

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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