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1. Planck early results. III. First assessment of the Low Frequency Instrument in-flight performance

Author

Mennella, A., Bersanelli, M., Butler, R. C., Curto, A., Cuttaia, F., Davis, R. J., Dick, J., Frailis, M., Galeotta, S., Gregorio, A., Kurki-Suonio, H., Lawrence, C. R., Leach, S., Leahy, J. P., Lowe, S., Maino, D., Mandolesi, N., Maris, M., Martínez-González, E., Meinhold, P. R., Morgante, G., Pearson, D., Perrotta, F., Polenta, G., Poutanen, T., Sandri, M., Seiffert, M. D., Suur-Uski, A. -S., Tavagnacco, D., Terenzi, L., Tomasi, M., Valiviita, J., Villa, F., Watson, R., Wilkinson, A., Zacchei, A., Zonca, A., Aja, B., Artal, E., Baccigalupi, C., Banday, A. J., Barreiro, R. B., Bartlett, J. G., Bartolo, N., Battaglia, P., Bennett, K., Bonaldi, A., Bonavera, L., Borrill, J., Bouchet, F. R., Burigana, C., Cabella, P., Cappellini, B., Chen, X., Colombo, L., Cruz, M., Danese, L., D'Arcangelo, O., Davies, R. D., de Gasperis, G., de Rosa, A., de Zotti, G., Dickinson, C., Diego, J. M., Donzelli, S., Efstathiou, G., Enßlin, T. A., Eriksen, H. K., Falvella, M. C., Finelli, F., Foley, S., Franceschet, C., Franceschi, E., Gaier, T. C., Génova-Santos, R. T., George, D., Gómez, F., González-Nuevo, J., Górski, K. M., Gruppuso, A., Hansen, F. K., Herranz, D., Herreros, J. M., Hoyland, R. J., Hughes, N., Jewell, J., Jukkala, P., Juvela, M., Kangaslahti, P., Keihänen, E., Keskitalo, R., Kilpia, V. -H., Kisner, T. S., Knoche, J., Knox, L., Laaninen, M., Lähteenmäki, A., Lamarre, J. -M., Leonardi, R., León-Tavares, J., Leutenegger, P., Lilje, P. B., López-Caniego, M., Lubin, P. M., Malaspina, M., Marinucci, D., Massardi, M., Matarrese, S., Matthai, F., Melchiorri, A., Mendes, L., Miccolis, M., Migliaccio, M., Mitra, S., Moss, A., Natoli, P., Nesti, R., Nørgaard-Nielsen, H. U., Pagano, L., Paladini, R., Paoletti, D., Partridge, B., Pasian, F., Pettorino, V., Pietrobon, D., Pospieszalski, M., Prézeau, G., Prina, M., Procopio, P., Puget, J. -L., Quercellini, C., Rachen, J. P., Rebolo, R., Reinecke, M., Ricciardi, S., Robbers, G., Rocha, G., Roddis, N., Rubiño-Martín, J. A., Savelainen, M., Scott, D., Silvestri, R., Simonetto, A., Sjoman, P., Smoot, G. F., Sozzi, C., Stringhetti, L., Tauber, J. A., Tofani, G., Toffolatti, L., Tuovinen, J., Türler, M., Umana, G., Valenziano, L., Varis, J., Vielva, P., Vittorio, N., Wade, L. A., Watson, C., White, S. D. M., and Winder, F.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The scientific performance of the Planck Low Frequency Instrument (LFI) after one year of in-orbit operation is presented. We describe the main optical parameters and discuss photometric calibration, white noise sensitivity, and noise properties. A preliminary evaluation of the impact of the main systematic effects is presented. For each of the performance parameters, we outline the methods used to obtain them from the flight data and provide a comparison with pre-launch ground assessments, which are essentially confirmed in flight., Comment: Published version

Published
2011
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2. Planck pre-launch status: calibration of the Low Frequency Instrument flight model radiometers

Author

Villa, F., Terenzi, L., Sandri, M., Meinhold, P., Poutanen, T., Battaglia, P., Franceschet, C., Hughes, N., Laaninen, M., Lapolla, P., Bersanelli, M., Butler, R. C., Cuttaia, F., D'Arcangelo, O., Frailis, M., Franceschi, E., Galeotta, S., Gregorio, A., Leonardi, R., Lowe, S. R., Mandolesi, N., Maris, M., Mendes, L., Mennella, A., Morgante, G., Stringhetti, L., Tomasi, M., Valenziano, L., Zacchei, A., Zonca, A., Aja, B., Artal, E., Balasini, M., Bernardino, T., Blackhurst, E., Boschini, L., Cappellini, B., Cavaliere, F., Colin, A., Colombo, F., Davis, R. J., De La Fuente, L., Edgeley, J., Gaier, T., Galtress, A., Hoyland, R., Jukkala, P., Kettle, D., Kilpia, V-H., Lawrence, C. R., Lawson, D., Leahy, J. P., Leutenegger, P., Levin, S., Maino, D., Malaspina, M., Mediavilla, A., Miccolis, M., Pagan, L., Pascual, J. P., Pasian, F., Pecora, M., Pospieszalski, M., Roddis, N., Salmon, M. J., Seiffert, M., Silvestri, R., Simonetto, A., Sjoman, P., Sozzi, C., Tuovinen, J., Varis, J., Wilkinson, A., and Winder, F.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The Low Frequency Instrument (LFI) on-board the ESA Planck satellite carries eleven radiometer subsystems, called Radiometer Chain Assemblies (RCAs), each composed of a pair of pseudo-correlation receivers. We describe the on-ground calibration campaign performed to qualify the flight model RCAs and to measure their pre-launch performances. Each RCA was calibrated in a dedicated flight-like cryogenic environment with the radiometer front-end cooled to 20K and the back-end at 300K, and with an external input load cooled to 4K. A matched load simulating a blackbody at different temperatures was placed in front of the sky horn to derive basic radiometer properties such as noise temperature, gain, and noise performance, e.g. 1/f noise. The spectral response of each detector was measured as was their susceptibility to thermal variation. All eleven LFI RCAs were calibrated. Instrumental parameters measured in these tests, such as noise temperature, bandwidth, radiometer isolation, and linearity, provide essential inputs to the Planck-LFI data analysis., Comment: 15 pages, 18 figures. Accepted for publication in Astronomy and Astrophysics

Published
2010
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3. Design, development, and verification of the Planck Low Frequency Instrument 70 GHz Front-End and Back-End Modules

Author

Varis, J., Hughes, N. J., Laaninen, M., Kilpia, V. -H., Jukkala, P., Tuovinen, J., Ovaska, S., Sjoman, P., Kangaslahti, P., Gaier, T., Hoyland, R., Meinhold, P., Mennella, A., Bersanelli, M., Butler, R. C., Cuttaia, F., Franceschi, E., Leonardi, R., Leutenegger, P., Malaspina, M., Mandolesi, N., Miccolis, M., Poutanen, T., Kurki-Suonio, H., Sandri, M., Stringhetti, L., Terenzi, L., Tomasi, M., and Valenziano, L.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

70 GHz radiometer front-end and back-end modules for the Low Frequency Instrument of the European Space Agencys Planck Mission were built and tested. The operating principles and the design details of the mechanical structures are described along with the key InP MMIC low noise amplifiers and phase switches of the units. The units were tested in specially designed cryogenic vacuum chambers capable of producing the operating conditions required for Planck radiometers, specifically, a physical temperature of 20 K for the front-end modules, 300 K for the back-end modules and 4 K for the reference signal sources. Test results of the low noise amplifiers and phase switches, the front and back-end modules, and the combined results of both modules are discussed. At 70 GHz frequency, the system noise temperature of the front and back end is 28 K; the effective bandwidth 16 GHz, and the 1/f spectrum knee frequency is 38 mHz. The test results indicate state-of-the-art performance at 70 GHz frequency and fulfil the Planck performance requirements., Comment: 16 pages, 15 figures. This paper is part of of the prelaunch status Planck LFI papers published on JINST: http://www.iop.org/EJ/journal/-page=extra.proc5/jinst

Published
2010
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4. Planck pre-launch status: Design and description of the Low Frequency Instrument

Author

Bersanelli, M., Mandolesi, N., Butler, R. C., Mennella, A., Villa, F., Aja, B., Artal, E., Artina, E., Baccigalupi, C., Balasini, M., Baldan, G., Banday, A., Bastia, P., Battaglia, P., Bernardino, T., Blackhurst, E., Boschini, L., Burigana, C., Cafagna, G., Cappellini, B., Cavaliere, F., Colombo, F., Crone, G., Cuttaia, F., D'Arcangelo, O., Danese, L., Davies, R. D., Davis, R. J., De Angelis, L., De Gasperis, G. C., De La Fuente, L., De Rosa, A., De Zotti, G., Falvella, M. C., Ferrari, F., Ferretti, R., Figini, L., Fogliani, S., Franceschet, C., Franceschi, E., Gaier, T., Garavaglia, S., Gomez, F., Gorski, K., Gregorio, A., Guzzi, P., Herreros, J. M., Hildebrandt, S. R., Hoyland, R., Hughes, N., Janssen, M., Jukkala, P., Kettle, D., Kilpia, V. H., Laaninen, M., Lapolla, P. M., Lawrence, C. R., Leahy, J. P., Leonardi, R., Leutenegger, P., Levin, S., Lilje, P. B., Lowe, S. R., Lubin, D. Lawson P. M., Maino, D., Malaspina, M., Maris, M., Marti-Canales, J., Martinez-Gonzalez, E., Mediavilla, A., Meinhold, P., Miccolis, M., Morgante, G., Natoli, P., Nesti, R., Pagan, L., Paine, C., Partridge, B., Pascual, J. P., Pasian, F., Pearson, D., Pecora, M., Perrotta, F., Platania, P., Pospieszalski, M., Poutanen, T., Prina, M., Rebolo, R., Roddis, N., Rubino-Martin, J. A., Salmon, n M. J., Sandri, M., Seiffert, M., Silvestri, R., Simonetto, A., Sjoman, P., Smoot, G. F., Sozzi, C., Stringhetti, L., Taddei, E., Tauber, J., Terenzi, L., Tomasi, M., Tuovinen, J., Valenziano, L., Varis, J., Vittorio, N., Wade, L. A., Wilkinson, A., Winder, F., Zacchei, A., and Zonca, A.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

In this paper we present the Low Frequency Instrument (LFI), designed and developed as part of the Planck space mission, the ESA program dedicated to precision imaging of the cosmic microwave background (CMB). Planck-LFI will observe the full sky in intensity and polarisation in three frequency bands centred at 30, 44 and 70 GHz, while higher frequencies (100-850 GHz) will be covered by the HFI instrument. The LFI is an array of microwave radiometers based on state-of-the-art Indium Phosphide cryogenic HEMT amplifiers implemented in a differential system using blackbody loads as reference signals. The front-end is cooled to 20K for optimal sensitivity and the reference loads are cooled to 4K to minimise low frequency noise. We provide an overview of the LFI, discuss the leading scientific requirements and describe the design solutions adopted for the various hardware subsystems. The main drivers of the radiometric, optical and thermal design are discussed, including the stringent requirements on sensitivity, stability, and rejection of systematic effects. Further details on the key instrument units and the results of ground calibration are provided in a set of companion papers., Comment: 23 pages, 31 figures, accepted by Astronomy and Astrophysics, Planck LFI technical papers published by JINST: http://www.iop.org/EJ/journal/-page=extra.proc5/1748-0221

Published
2010
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5. Planck early results. III. First assessment of the Low Frequency Instrument in-flight performance

Author

Poutanen, T., Lähteenmäki, A., León-Tavares, J., Polenta, G., Natoli, P., Falvella, M.C., Bartlett, J.G., Smoot, G.F., Bonavera, L., Banday, A.J., Seiffert, M.D., Paladini, R., Prézeau, G., Rocha, G., Lilje, P.B., Hughes, N., Jukkala, P., Kilpia, V.-H., Sjoman, P., Nørgaard-Nielsen, Hans Ulrik, Toffolatti, L., Aja, B., Artal, E., Cruz, M., Moss, A., Scott, D., Colombo, L., Kurki-Suonio, H., Suur-Uski, A.-S., Juvela, M., Keihänen, E., Keskitalo, R., Savelainen, M., Knox, L., Meinhold, P.R., Zonca, A., Leonardi, R., Lubin, P.M., Bartolo, N., Matarrese, S., Melchiorri, A., Mennella, A., Maino, D., Tomasi, M., Franceschet, C., Gregorio, A., Cabella, P., De Gasperis, G., Migliaccio, M., Quercellini, C., Vittorio, N., Marinucci, D., Génova-Santos, R.T., Rebolo, R., Rubi No-Martín, J.A., Mendes, L., Foley, S., Watson, C., Bennett, K., Tauber, J.A., Partridge, B., Nesti, R., Tofani, G., Umana, G., Bonaldi, A., De Zotti, G., Massardi, M., Frailis, M., Galeotta, S., Maris, M., Tavagnacco, D., Zacchei, A., Pasian, F., Butler, R.C., Cuttaia, F., Mandolesi, N., Morgante, G., Sandri, M., Terenzi, L., Villa, F., Burigana, C., De Rosa, A., Finelli, F., Franceschi, E., Gruppuso, A., Malaspina, M., Paoletti, D., Procopio, P., Ricciardi, S., Stringhetti, L., Valenziano, L., Cappellini, B., Donzelli, S., Türler, M., Chen, X., Puget, J.-L., Bouchet, F.R., Efstathiou, G., Valiviita, J., Eriksen, H.K., Hansen, F.K., Gómez, F., Herreros, J.M., Hoyland, R.J., Curto, A., Martínez-González, E., Barreiro, R.B., Diego, J.M., Herranz, D., López-Caniego, M., Vielva, P., D'Arcangelo, O., Simonetto, A., Sozzi, C., Lawrence, C.R., Pearson, D., Gaier, T.C., Górski, K.M., Jewell, J., Kangaslahti, P., Mitra, S., Pagano, L., Pietrobon, D., Prina, M., Wade, L.A., Davis, R.J., Leahy, J.P., Lowe, S., Watson, R., Wilkinson, A., Davies, R.D., Dickinson, C., Roddis, N., Winder, F., Lamarre, J.-M., Borrill, J., Kisner, T.S., Enßlin, T.A., Knoche, J., Matthai, F., Rachen, J.P., Reinecke, M., Robbers, G., White, S.D.M., Tuovinen, J., Varis, J., Pospieszalski, M., Laaninen, M., Dick, J., Leach, S., Perrotta, F., Baccigalupi, C., Danese, L., González-Nuevo, J., Pettorino, V., George, D., Battaglia, P., Leutenegger, P., Miccolis, M., Silvestri, R., APC - Cosmologie, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), PLANCK, Universidad de Cantabria, Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Mennella, A., Bersanelli, M., Butler, R. C., Curto, A., Cuttaia, F., Davis, R. J., Dick, J., Frailis, M., Galeotta, S., Gregorio, Anna, Kurki Suonio, H., Lawrence, C. R., Leach, S., Leahy, J. P., Lowe, S., Maino, D., Mandolesi, N., Maris, M., Mart'inez González, E., Meinhold, P. R., Morgante, G., Pearson, D., Perrotta, F., Polenta, G., Poutanen, T., Sandri, M., Seiffert, M. D., Suur Uski, A. S., Tavagnacco, Daniele, Terenzi, L., Tomasi, M., Valiviita, J., Villa, F., Watson, R., Wilkinson, A., Zacchei, A., Zonca, A., Aja, B., Artal, E., Baccigalupi, C., Banday, A. J., Barreiro, R. B., Bartlett, J. G., Bartolo, N., Battaglia, P., Bennett, K., Bonaldi, A., Bonavera, L., Borrill, J., Bouchet, F. R., Burigana, C., Cabella, P., Cappellini, B., Chen, X., Colombo, L., Cruz, M., Danese, L., D'Arcangelo, O., Davies, R. D., de Gasperis, G., de Rosa, A., de Zotti, G., Dickinson, C., Diego, J. M., Donzelli, S., Efstathiou, G., Ensslin, T. A., Eriksen, H. K., Falvella, M. C., Finelli, F., Foley, S., Franceschet, C., Franceschi, E., Gaier, T. C., Génova Santos, R. T., George, D., Gómez, F., González Nuevo, J., Górski, K. M., Gruppuso, A., Hansen, F. K., Herranz, D., Herreros, J. M., Hoyland, R. J., Hughes, N., Jewell, J., Jukkala, P., Juvela, M., Kangaslahti, P., Keihänen, E., Keskitalo, R., Kilpia, V. H., Kisner, T. S., Knoche, J., Knox, L., Laaninen, M., Lähteenmäki, A., Lamarre, J. M., Leonardi, R., León Tavares, J., Leutenegger, P., Lilje, P. B., López Caniego, M., Lubin, P. M., Malaspina, M., Marinucci, D., Massardi, M., Matarrese, S., Matthai, F., Melchiorri, A., Mendes, L., Miccolis, M., Migliaccio, M., Mitra, S., Moss, A., Natoli, P., Nesti, R., Norgaard Nielsen, H. U., Pagano, L., Paladini, R., Paoletti, D., Partridge, B., Pasian, F., Pettorino, V., Pietrobon, D., Pospieszalski, M., Prézeau, G., Prina, M., Procopio, P., Puget, J. L., Quercellini, C., Rachen, J. P., Rebolo, R., Reinecke, M., Ricciardi, S., Robbers, G., Rocha, G., Roddis, N., Rubino Martín, J. A., Savelainen, M., Scott, D., Silvestri, R., Simonetto, A., Sjoman, P., Smoot, G. F., Sozzi, C., Stringhetti, L., Tauber, J. A., Tofani, G., Tuovinen, J., Türler, M., Umana, G., Valenziano, L., Varis, J., Vielva, P., Vittorio, N., Wade, L. A., Watson, C., White, S., Winder, F., Department of Physics, and Helsinki Institute of Physics

Subjects
[PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Cosmology and Nongalactic Astrophysics (astro-ph.CO), [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], education, Cosmic background radiation, FOS: Physical sciences, Astrophysics, cosmic background radiation, Low frequency, Cosmic backround radiation, 7. Clean energy, 01 natural sciences, instruments [Space vehicles], [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], symbols.namesake, Settore FIS/05 - Astronomia e Astrofisica, CMB physics, 0103 physical sciences, Space vehicles: instruments, Instrumentation: detectors, Planck, cosmology: observations, space vehicles: instruments, instrumentation: detectors, observations [Cosmology], 010303 astronomy & astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), detectors [Instrumentation], detectors, Physics, 010308 nuclear & particles physics, Planck ESA mission, Cosmology: observations, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, 115 Astronomy, Space science, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], observations, Early results, Space and Planetary Science, symbols, space vehicles, Astrophysics - Instrumentation and Methods for Astrophysics, cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

29 páginas, 31 figuras, 15 tablas.-- Planck Collaboration: et al., The scientific performance of the Planck Low Frequency Instrument (LFI) after one year of in-orbit operation is presented. We describe the main optical parameters and discuss photometric calibration, white noise sensitivity, and noise properties. A preliminary evaluation of the impact of the main systematic effects is presented. For each of the performance parameters, we outline the methods used to obtain them from the flight data and provide a comparison with pre-launch ground assessments, which are essentially confirmed in flight., The Consortia are led by the Principal Investigators: J.-L. Puget in France for HFI (funded principally by CNES and CNRS/INSU-IN2P3) and N. Mandolesi in Italy for LFI (funded principally via ASI). NASA’s US Planck Project, based at JPL and involving scientists at many US institutions, contributes significantly to the efforts of these two Consortia. In Finland, the Planck LFI 70 GHz work was supported by the Finnish Funding Agency for Technology and Innovation (Tekes). This work was also supported by the Academy of Finland, CSC, and DEISA (EU).

Published
2011
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9. Planckearly results. III. First assessment of the Low Frequency Instrument in-flight performance

Author

Mennella, A., primary, Bersanelli, M., additional, Butler, R. C., additional, Curto, A., additional, Cuttaia, F., additional, Davis, R. J., additional, Dick, J., additional, Frailis, M., additional, Galeotta, S., additional, Gregorio, A., additional, Kurki-Suonio, H., additional, Lawrence, C. R., additional, Leach, S., additional, Leahy, J. P., additional, Lowe, S., additional, Maino, D., additional, Mandolesi, N., additional, Maris, M., additional, Martínez-González, E., additional, Meinhold, P. R., additional, Morgante, G., additional, Pearson, D., additional, Perrotta, F., additional, Polenta, G., additional, Poutanen, T., additional, Sandri, M., additional, Seiffert, M. D., additional, Suur-Uski, A.-S., additional, Tavagnacco, D., additional, Terenzi, L., additional, Tomasi, M., additional, Valiviita, J., additional, Villa, F., additional, Watson, R., additional, Wilkinson, A., additional, Zacchei, A., additional, Zonca, A., additional, Aja, B., additional, Artal, E., additional, Baccigalupi, C., additional, Banday, A. J., additional, Barreiro, R. B., additional, Bartlett, J. G., additional, Bartolo, N., additional, Battaglia, P., additional, Bennett, K., additional, Bonaldi, A., additional, Bonavera, L., additional, Borrill, J., additional, Bouchet, F. R., additional, Burigana, C., additional, Cabella, P., additional, Cappellini, B., additional, Chen, X., additional, Colombo, L., additional, Cruz, M., additional, Danese, L., additional, D’Arcangelo, O., additional, Davies, R. D., additional, de Gasperis, G., additional, de Rosa, A., additional, de Zotti, G., additional, Dickinson, C., additional, Diego, J. M., additional, Donzelli, S., additional, Efstathiou, G., additional, Enßlin, T. A., additional, Eriksen, H. K., additional, Falvella, M. C., additional, Finelli, F., additional, Foley, S., additional, Franceschet, C., additional, Franceschi, E., additional, Gaier, T. C., additional, Génova-Santos, R. T., additional, George, D., additional, Gómez, F., additional, González-Nuevo, J., additional, Górski, K. M., additional, Gruppuso, A., additional, Hansen, F. K., additional, Herranz, D., additional, Herreros, J. M., additional, Hoyland, R. J., additional, Hughes, N., additional, Jewell, J., additional, Jukkala, P., additional, Juvela, M., additional, Kangaslahti, P., additional, Keihänen, E., additional, Keskitalo, R., additional, Kilpia, V.-H., additional, Kisner, T. S., additional, Knoche, J., additional, Knox, L., additional, Laaninen, M., additional, Lähteenmäki, A., additional, Lamarre, J.-M., additional, Leonardi, R., additional, León-Tavares, J., additional, Leutenegger, P., additional, Lilje, P. B., additional, López-Caniego, M., additional, Lubin, P. M., additional, Malaspina, M., additional, Marinucci, D., additional, Massardi, M., additional, Matarrese, S., additional, Matthai, F., additional, Melchiorri, A., additional, Mendes, L., additional, Miccolis, M., additional, Migliaccio, M., additional, Mitra, S., additional, Moss, A., additional, Natoli, P., additional, Nesti, R., additional, Nørgaard-Nielsen, H. U., additional, Pagano, L., additional, Paladini, R., additional, Paoletti, D., additional, Partridge, B., additional, Pasian, F., additional, Pettorino, V., additional, Pietrobon, D., additional, Pospieszalski, M., additional, Prézeau, G., additional, Prina, M., additional, Procopio, P., additional, Puget, J.-L., additional, Quercellini, C., additional, Rachen, J. P., additional, Rebolo, R., additional, Reinecke, M., additional, Ricciardi, S., additional, Robbers, G., additional, Rocha, G., additional, Roddis, N., additional, Rubi no-Martín, J. A., additional, Savelainen, M., additional, Scott, D., additional, Silvestri, R., additional, Simonetto, A., additional, Sjoman, P., additional, Smoot, G. F., additional, Sozzi, C., additional, Stringhetti, L., additional, Tauber, J. A., additional, Tofani, G., additional, Toffolatti, L., additional, Tuovinen, J., additional, Türler, M., additional, Umana, G., additional, Valenziano, L., additional, Varis, J., additional, Vielva, P., additional, Vittorio, N., additional, Wade, L. A., additional, Watson, C., additional, White, S. D. M., additional, and Winder, F., additional

Published
2011
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10. Planckpre-launch status: Calibration of the Low Frequency Instrument flight model radiometers

Author

Villa, F., primary, Terenzi, L., additional, Sandri, M., additional, Meinhold, P., additional, Poutanen, T., additional, Battaglia, P., additional, Franceschet, C., additional, Hughes, N., additional, Laaninen, M., additional, Lapolla, P., additional, Bersanelli, M., additional, Butler, R. C., additional, Cuttaia, F., additional, D'Arcangelo, O., additional, Frailis, M., additional, Franceschi, E., additional, Galeotta, S., additional, Gregorio, A., additional, Leonardi, R., additional, Lowe, S. R., additional, Mandolesi, N., additional, Maris, M., additional, Mendes, L., additional, Mennella, A., additional, Morgante, G., additional, Stringhetti, L., additional, Tomasi, M., additional, Valenziano, L., additional, Zacchei, A., additional, Zonca, A., additional, Aja, B., additional, Artal, E., additional, Balasini, M., additional, Bernardino, T., additional, Blackhurst, E., additional, Boschini, L., additional, Cappellini, B., additional, Cavaliere, F., additional, Colin, A., additional, Colombo, F., additional, Davis, R. J., additional, De La Fuente, L., additional, Edgeley, J., additional, Gaier, T., additional, Galtress, A., additional, Hoyland, R., additional, Jukkala, P., additional, Kettle, D., additional, Kilpia, V.-H., additional, Lawrence, C. R., additional, Lawson, D., additional, Leahy, J. P., additional, Leutenegger, P., additional, Levin, S., additional, Maino, D., additional, Malaspina, M., additional, Mediavilla, A., additional, Miccolis, M., additional, Pagan, L., additional, Pascual, J. P., additional, Pasian, F., additional, Pecora, M., additional, Pospieszalski, M., additional, Roddis, N., additional, Salmon, M. J., additional, Seiffert, M., additional, Silvestri, R., additional, Simonetto, A., additional, Sjoman, P., additional, Sozzi, C., additional, Tuovinen, J., additional, Varis, J., additional, Wilkinson, A., additional, and Winder, F., additional

Published
2010
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11. Planckpre-launch status: Design and description of the Low Frequency Instrument

Author

Bersanelli, M., primary, Mandolesi, N., additional, Butler, R. C., additional, Mennella, A., additional, Villa, F., additional, Aja, B., additional, Artal, E., additional, Artina, E., additional, Baccigalupi, C., additional, Balasini, M., additional, Baldan, G., additional, Banday, A., additional, Bastia, P., additional, Battaglia, P., additional, Bernardino, T., additional, Blackhurst, E., additional, Boschini, L., additional, Burigana, C., additional, Cafagna, G., additional, Cappellini, B., additional, Cavaliere, F., additional, Colombo, F., additional, Crone, G., additional, Cuttaia, F., additional, D'Arcangelo, O., additional, Danese, L., additional, Davies, R. D., additional, Davis, R. J., additional, De Angelis, L., additional, De Gasperis, G. C., additional, De La Fuente, L., additional, De Rosa, A., additional, De Zotti, G., additional, Falvella, M. C., additional, Ferrari, F., additional, Ferretti, R., additional, Figini, L., additional, Fogliani, S., additional, Franceschet, C., additional, Franceschi, E., additional, Gaier, T., additional, Garavaglia, S., additional, Gomez, F., additional, Gorski, K., additional, Gregorio, A., additional, Guzzi, P., additional, Herreros, J. M., additional, Hildebrandt, S. R., additional, Hoyland, R., additional, Hughes, N., additional, Janssen, M., additional, Jukkala, P., additional, Kettle, D., additional, Kilpiä, V. H., additional, Laaninen, M., additional, Lapolla, P. M., additional, Lawrence, C. R., additional, Lawson, D., additional, Leahy, J. P., additional, Leonardi, R., additional, Leutenegger, P., additional, Levin, S., additional, Lilje, P. B., additional, Lowe, S. R., additional, Lubin, P. M., additional, Maino, D., additional, Malaspina, M., additional, Maris, M., additional, Marti-Canales, J., additional, Martinez-Gonzalez, E., additional, Mediavilla, A., additional, Meinhold, P., additional, Miccolis, M., additional, Morgante, G., additional, Natoli, P., additional, Nesti, R., additional, Pagan, L., additional, Paine, C., additional, Partridge, B., additional, Pascual, J. P., additional, Pasian, F., additional, Pearson, D., additional, Pecora, M., additional, Perrotta, F., additional, Platania, P., additional, Pospieszalski, M., additional, Poutanen, T., additional, Prina, M., additional, Rebolo, R., additional, Roddis, N., additional, Rubiño-Martin, J. A., additional, Salmon, M. J., additional, Sandri, M., additional, Seiffert, M., additional, Silvestri, R., additional, Simonetto, A., additional, Sjoman, P., additional, Smoot, G. F., additional, Sozzi, C., additional, Stringhetti, L., additional, Taddei, E., additional, Tauber, J., additional, Terenzi, L., additional, Tomasi, M., additional, Tuovinen, J., additional, Valenziano, L., additional, Varis, J., additional, Vittorio, N., additional, Wade, L. A., additional, Wilkinson, A., additional, Winder, F., additional, Zacchei, A., additional, and Zonca, A., additional

Published
2010
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15. A W-band Radar Receiver for Cloud Observations

Author

Kangaslahti, P., primary, Sjoman, P., additional, Jukkala, P., additional, Barnes, A. R., additional, Munday, P., additional, Jennings, R., additional, Moore, M. T., additional, Karttaavi, T., additional, Lahdes, M., additional, and Tuovinen, J., additional

Published
2002
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17. Conifers from China's Taibai Mountain.

Author

Sjoman, Henrik

Abstract

Presents information on conifer species that have potential as landscape plants found at the Taibai National Park in Taibai Mountain Shaanxi Sheng, China. Characteristics of Larix chinensis; Description of Abies fargessi compared to other Asian fir species; Other conifers found in the national park.

Published
2005

18. Marked By Lightning - The Paintings of Jim Clark.

Author

Sjoman, N.E.

Subjects
PAINTING, PAINTERS, ARTISTS, AESTHETICS
Abstract

The article explores the painting style of Jim Clark. Clark is known as a master reductionist. He paints surface after surface, and on their reflecting and transparent skins. Clark's "Carpet" paintings, like "Mining Blue Mountain," operate with the confines of a new aesthetic. His aesthetic is self-enriching because it is not based on image.

Published
1999

19. Book Reviews

Author

Wylie, Jonathan, Hekker, M., Kool, Fokko P.C., Kuper, Adam, Niessen, S.A., Meijers, L.D., Tichelman, Fritjof, Bakel, M.A., Papousek, Dick A., Duller, H.J., Condominas, Georges, Nas, Peter J.M., Dijk, Toos, Le Goff, Jacques, Anders Vestergaard, Torben, Meer, Wim, Ysebaert-Deen, A., Koster, Adrianus, Baal, J., Claessen, H.J.M., Box, I., Dekker, Jeroen H., Post, Cees L., Sjoman, N.E., Velde, Pieter, and Broek, Gerard J.

Published
1983
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20. Oriental Pink Lime.

Author

Sjoman, N. E.

Subjects
GAY artists, PAINTING, CALENDAR art, VIOLENCE against gay people, GAY people in art
Abstract

The article focuses on the life and works of Indian artist Bhupen Khakar. His paintings are visually synthetic and which take into account poster and calendar art. He had to work as a chartered accountant for 25 years, was ostracized and experienced the brutality of gay bashing. He practices an ancient genre of painting in which animals and humans assume one another's forms and characteristics.

Published
1998

26. Pink Paws in Berlin.

Author

Sjoman, N. E.

Subjects
EXHIBITIONS, ART exhibitions, MUSEUM exhibits, GAY rights movement
Abstract

This article reviews the exhibition "Goodbye to Berlin: 100 Years of Gay Liberation" in Berlin on July 1997.

Published
1997

27. Planck early results. III. First assessment of the Low Frequency Instrument in-flight performance ⋆

Author

Mennella, A., Bersanelli, M., Butler, R. C., Curto, A., Cuttaia, F., Davis, R. J., Dick, J., Frailis, M., Galeotta, S., Gregorio, A., Kurki-Suonio, H., Lawrence, C. R., Leach, S., Leahy, J. P., Lowe, S., Maino, D., Mandolesi, N., Maris, M., Martínez-González, E., Meinhold, P. R., Morgante, G., Pearson, D., Perrotta, F., Polenta, G., Poutanen, T., Sandri, M., Seiffert, M. D., Suur-Uski, A.-S., Tavagnacco, D., Terenzi, L., Tomasi, M., Valiviita, J., Villa, F., Watson, R., Wilkinson, A., Zacchei, A., Zonca, A., Aja, B., Artal, E., Baccigalupi, C., Banday, A. J., Barreiro, R. B., Bartlett, J. G., Bartolo, N., Battaglia, P., Bennett, K., Bonaldi, A., Bonavera, L., Borrill, J., Bouchet, F. R., Burigana, C., Cabella, P., Cappellini, B., Chen, X., Colombo, L., Cruz, M., Danese, L., D’Arcangelo, O., Davies, R. D., de Gasperis, G., de Rosa, A., de Zotti, G., Dickinson, C., Diego, J. M., Donzelli, S., Efstathiou, G., Enßlin, T. A., Eriksen, H. K., Falvella, M. C., Finelli, F., Foley, S., Franceschet, C., Franceschi, E., Gaier, T. C., Génova-Santos, R. T., George, D., Gómez, F., González-Nuevo, J., Górski, K. M., Gruppuso, A., Hansen, F. K., Herranz, D., Herreros, J. M., Hoyland, R. J., Hughes, N., Jewell, J., Jukkala, P., Juvela, M., Kangaslahti, P., Keihänen, E., Keskitalo, R., Kilpia, V.-H., Kisner, T. S., Knoche, J., Knox, L., Laaninen, M., Lähteenmäki, A., Lamarre, J.-M., Leonardi, R., León-Tavares, J., Leutenegger, P., Lilje, P. B., López-Caniego, M., Lubin, P. M., Malaspina, M., Marinucci, D., Massardi, M., Matarrese, S., Matthai, F., Melchiorri, A., Mendes, L., Miccolis, M., Migliaccio, M., Mitra, S., Moss, A., Natoli, P., Nesti, R., Nørgaard-Nielsen, H. U., Pagano, L., Paladini, R., Paoletti, D., Partridge, B., Pasian, F., Pettorino, V., Pietrobon, D., Pospieszalski, M., Prézeau, G., Prina, M., Procopio, P., Puget, J.-L., Quercellini, C., Rachen, J. P., Rebolo, R., Reinecke, M., Ricciardi, S., Robbers, G., Rocha, G., Roddis, N., Rubi no-Martín, J. A., Savelainen, M., Scott, D., Silvestri, R., Simonetto, A., Sjoman, P., Smoot, G. F., Sozzi, C., Stringhetti, L., Tauber, J. A., Tofani, G., Toffolatti, L., Tuovinen, J., Türler, M., Umana, G., Valenziano, L., Varis, J., Vielva, P., Vittorio, N., Wade, L. A., Watson, C., White, S. D. M., and Winder, F.

Abstract

The scientific performance of the Planck Low Frequency Instrument (LFI) after one year of in-orbit operation is presented. We describe the main optical parameters and discuss photometric calibration, white noise sensitivity, and noise properties. A preliminary evaluation of the impact of the main systematic effects is presented. For each of the performance parameters, we outline the methods used to obtain them from the flight data and provide a comparison with pre-launch ground assessments, which are essentially confirmed in flight.

Published
2011
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28. Rights of Passage.

Author

Sjoman, N. E.

Subjects
ART, NONFICTION
Abstract

The article reviews the book "Rights of Passage," by Timothy Hyman.

Published
1999

29. Letters To The Editor.

Author

Sjoman, Henrik

Abstract

A letter to the editor is presented which discusses the dwarf Alberta spruce conifer.

Published
2007

30. Planck pre-launch status:Design and description of the Low Frequency Instrument

Author

M. Bersanelli, N. Mandolesi, R. C. Butler, A. Mennella, F. Villa, B. Aja, E. Artal, E. Artina, C. Baccigalupi, M. Balasini, G. Baldan, A. Banday, P. Bastia, P. Battaglia, T. Bernardino, E. Blackhurst, L. Boschini, C. Burigana, G. Cafagna, B. Cappellini, F. Cavaliere, F. Colombo, G. Crone, F. Cuttaia, O. D'Arcangelo, L. Danese, R. D. Davies, R. J. Davis, L. De Angelis, G. C. De Gasperis, L. De La Fuente, A. De Rosa, G. De Zotti, M. C. Falvella, F. Ferrari, R. Ferretti, L. Figini, S. Fogliani, C. Franceschet, E. Franceschi, T. Gaier, S. Garavaglia, F. Gomez, K. Gorski, A. Gregorio, P. Guzzi, J. M. Herreros, S. R. Hildebrandt, R. Hoyland, N. Hughes, M. Janssen, P. Jukkala, D. Kettle, V. H. Kilpiä, M. Laaninen, P. M. Lapolla, C. R. Lawrence, D. Lawson, J. P. Leahy, R. Leonardi, P. Leutenegger, S. Levin, P. B. Lilje, S. R. Lowe, P. M. Lubin, D. Maino, M. Malaspina, M. Maris, J. Marti-Canales, E. Martinez-Gonzalez, A. Mediavilla, P. Meinhold, M. Miccolis, G. Morgante, P. Natoli, R. Nesti, L. Pagan, C. Paine, B. Partridge, J. P. Pascual, F. Pasian, D. Pearson, M. Pecora, F. Perrotta, P. Platania, M. Pospieszalski, T. Poutanen, M. Prina, R. Rebolo, N. Roddis, J. A. Rubiño-Martin, M. J. Salmon, M. Sandri, M. Seiffert, R. Silvestri, A. Simonetto, P. Sjoman, G. F. Smoot, C. Sozzi, L. Stringhetti, E. Taddei, J. Tauber, L. Terenzi, M. Tomasi, J. Tuovinen, L. Valenziano, J. Varis, N. Vittorio, L. A. Wade, A. Wilkinson, F. Winder, A. Zacchei, A. Zonca, APC - Cosmologie, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), PLANCK, Universidad de Cantabria, Bersanelli, M, Mandolesi, N, BUTLER R., C, Mennella, A, Villa, F, Aja, B, Artal, E, Artina, E, Baccigalupi, C, Balasini, M, Baldan, G, Banday, A, Bastia, P, Battaglia, P, Bernardino, T, Blackhurst, E, Boschini, L, Burigana, C, Cafagna, G, Cappellini, B, Cavaliere, F, Colombo, F, Crone, G, Cuttaia, F, Darcangelo, O, Danese, L, DAVIES R., D, DAVIS R., J, DE ANGELIS, L, DE GASPERIS G., C, DE LA FUENTE, L, DE ROSA, A, DE ZOTTI, G, FALVELLA M., C, Ferrari, F, Ferretti, R, Figini, L, Fogliani, S, Franceschet, C, Franceschi, E, Gaier, T, Garavaglia, S, Gomez, F, Gorski, K, Gregorio, Anna, Guzzi, P, HERREROS J., M, HILDEBRANDT S., R, Hoyland, R, Hughes, N, Janssen, M, Jukkala, P, Kettle, D, KILPIA V., H, Laaninen, M, LAPOLLA P., M, LAWRENCE C., R, Lawson, D, LEAHY J., P, Leonardi, R, Leutenegger, P, Levin, S, LILJE P., B, LOWE S., R, LUBIN P., M, Maino, D, Malaspina, M, Maris, M, MARTI CANALES, J, MARTINEZ GONZALEZ, E, Mediavilla, A, Meinhold, P, Miccolis, M, Morgante, G, Natoli, P, Nesti, R, Pagan, L, Paine, C, Partridge, B, PASCUAL J., P, Pasian, F, Pearson, D, Pecora, M, Perrotta, F, Platania, P, Pospieszalski, M, Poutanen, T, Prina, M, Rebolo, R, Roddis, N, RUBINO MARTIN J., A, SALMON M., J, Sandri, M, Seiffert, M, Silvestri, R, Simonetto, A, Sjoman, P, SMOOT G., F, Sozzi, C, Stringhetti, L, Taddei, E, Tauber, J, Terenzi, L, Tomasi, M, Tuovinen, J, Valenziano, L, Varis, J, Vittorio, N, WADE L., A, Wilkinson, A, Winder, F, Zacchei, A, Zonca, A., Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)

Subjects
detectors – instrumentation, Computer science, [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Cosmic microwave background, cosmic microwave background, cosmology: observations, space vehicles: instruments, 01 natural sciences, 7. Clean energy, CMB physics, observations [Cosmology], 010303 astronomy & astrophysics, Planck ESA mission, Astrophysics::Instrumentation and Methods for Astrophysics, Polarization (waves), symbols, Radiometric dating, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Low frequency, Radio spectrum, instruments – instrumentation [cosmic microwave background – telescopes – space vehicles], [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], instruments [Space vehicles], symbols.namesake, Settore FIS/05 - Astronomia e Astrofisica, 0103 physical sciences, Electronic engineering, Calibration, Black-body radiation, Sensitivity (control systems), Planck, Instrumentation and Methods for Astrophysics (astro-ph.IM), cosmic microwave background – telescopes – space vehicles: instruments – instrumentation, Radiometer, cosmology-observations, 010308 nuclear & particles physics, Amplifier, Astronomy and Astrophysics, polarimeters – submillimeter, Space and Planetary Science, general, space vehicles-instruments, Microwave
Abstract

21 páginas, 23 figuras, 13 tablas.-- et al., In this paper we present the Low Frequency Instrument (LFI), designed and developed as part of the Planck space mission, the ESA programme dedicated to precision imaging of the cosmic microwave background (CMB). Planck-LFI will observe the full sky in intensity and polarisation in three frequency bands centred at 30, 44 and 70 GHz, while higher frequencies (100–850 GHz) will be covered by the HFI instrument. The LFI is an array of microwave radiometers based on state-of-the-art indium phosphide cryogenic HEMT amplifiers implemented in a differential system using blackbody loads as reference signals. The front end is cooled to 20 K for optimal sensitivity and the reference loads are cooled to 4 K to minimise low-frequency noise. We provide an overview of the LFI, discuss the leading scientific requirements, and describe the design solutions adopted for the various hardware subsystems. The main drivers of the radiometric, optical, and thermal design are discussed, including the stringent requirements on sensitivity, stability, and rejection of systematic effects. Further details on the key instrument units and the results of ground calibration are provided in a set of companion papers., T.P.’s work was supported in part by the Academy of Finland grants 205800, 214598, 121703, and 121962. T.P. thanks the Waldemar von Frenckells Stiftelse, Magnus Ehrnrooth Foundation, and Väisälä Foundation for financial support. We acknowledge partial support from the NASA LTSA Grant NNG04CG90G.

Published
2010
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31. Planck pre-launch status:Calibration of the Low Frequency Instrument flight model radiometers

Author

Angel Colin, Davide Maino, Charles R. Lawrence, O. D'Arcangelo, Andrea Zonca, Jussi Varis, F. Pasian, Andrea Zacchei, R. Silvestri, Gianluca Morgante, M. J. Salmon, E. Franceschi, E. Blackhurst, M. Laaninen, D. Lawson, A. Simonetto, M. Sandri, S. R. Lowe, L. Pagan, F. Winder, S. Galeotta, L. de la Fuente, J. Edgeley, A. Mennella, M. Frailis, Althea Wilkinson, N. Hughes, J. P. Leahy, P. Sjoman, M. Balasini, F. Cuttaia, D. Kettle, V. H. Kilpiä, Anna Gregorio, A. Galtress, M. Pecora, M. Maris, P. Battaglia, Beatriz Aja, Eduardo Artal, Fabrizio Villa, P. Leutenegger, Roger J. Hoyland, Luca Valenziano, T. Poutanen, Luca Stringhetti, M. Miccolis, Peter Meinhold, N. Mandolesi, M. Tomasi, Marco Bersanelli, Marian Pospieszalski, Francesco Cavaliere, B. Cappellini, L. Mendes, P. Jukkala, Cristian Franceschet, Michael Seiffert, Carlo Sozzi, Juan Pablo Pascual, F. Colombo, L. Boschini, J. Tuovinen, A. Mediavilla, Steven Levin, N. Roddis, P. M. Lapolla, R. J. Davis, R. C. Butler, Rodrigo Leonardi, Todd Gaier, Luca Terenzi, M. Malaspina, T. Bernardino, Villa, F., Terenzi, L., Sandri, M., Meinhold, P., Poutanen, T., Battaglia, P., Franceschet, C., Hughes, N., Laaninen, M., Lapolla, P., Bersanelli, M., Butler, R. C., Cuttaia, F., D'Arcangelo, O., Frailis, M., Franceschi, E., Galeotta, S., Gregorio, Anna, Leonardi, R., Lowe, S. R., Mandolesi, N., Maris, M., Mendes, L., Mennella, A., Morgante, G., Stringhetti, L., Tomasi, M., Valenziano, L., Zacchei, A., Zonca, A., Aja, B., Artal, E., Balasini, M., Bernardino, T., Blackhurst, E., Boschini, L., Cappellini, B., Cavaliere, F., Colin, A., Colombo, F., Davis, R. J., De La Fuente, L., Edgeley, J., Gaier, T., Galtress, A., Hoyland, R., Jukkala, P., Kettle, D., Kilpia, V. H., Lawrence, C. R., Lawson, D., Leahy, J. P., Leutenegger, P., Levin, S., Maino, D., Malaspina, M., Mediavilla, A., Miccolis, M., Pagan, L., Pascual, J. P., Pasian, F., Pecora, M., Pospieszalski, M., Roddis, N., Salmon, M. J., Seiffert, M., Silvestri, R., Simonetto, A., Sjoman, P., Sozzi, C., Tuovinen, J., Varis, J., Wilkinson, A., Winder, F., and Universidad de Cantabria

Subjects
cosmic microwave background, media_common.quotation_subject, miscellaneous [Techniques], FOS: Physical sciences, Low frequency, 01 natural sciences, 7. Clean energy, Cosmic microwave background, instruments [Space vehicles], techniques-miscellaneous, CMB physics, 0103 physical sciences, cosmic microwave background – cosmology, Black-body radiation, Space vehicles: instruments, Instrumentation: detectors, 010303 astronomy & astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), detectors [Instrumentation], Remote sensing, media_common, Physics, Noise temperature, Radiometer, Techniques: miscellaneous, observations – space vehicles, 010308 nuclear & particles physics, Planck ESA mission, Bandwidth (signal processing), Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Linearity, Astronomy and Astrophysics, Space and Planetary Science, Sky, space vehicles-instruments, instruments, instrumentation-detectors, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

14 páginas, 17 figuras, 15 tablas.-- et al., The Low Frequency Instrument (LFI) on-board the ESA Planck satellite carries eleven radiometer subsystems, called radiometer chain assemblies (RCAs), each composed of a pair of pseudo-correlation receivers. We describe the on-ground calibration campaign performed to qualify the flight model RCAs and to measure their pre-launch performances. Each RCA was calibrated in a dedicated flight-like cryogenic environment with the radiometer front-end cooled to 20 K and the back-end at 300 K, and with an external input load cooled to 4 K. A matched load simulating a blackbody at different temperatures was placed in front of the sky horn to derive basic radiometer properties such as noise temperature, gain, and noise performance, e.g. 1/f noise. The spectral response of each detector was measured as was their susceptibility to thermal variation. All eleven LFI RCAs were calibrated. Instrumental parameters measured in these tests, such as noise temperature, bandwidth, radiometer isolation, and linearity, provide essential inputs to the Planck-LFI data analysis., Planck is a project of the European Space Agency with instruments funded by ESA member states, and with special contributions from Denmark and NASA (USA). The Planck-LFI project is developed by an International Consortium lead by Italy and involving Canada, Finland, Germany, Norway, Spain, Switzerland, UK, USA. The Italian contribution to Planck is supported by the Italian Space Agency (ASI). In Finland, the Planck LFI 70 GHz work was supported by the Finnish Funding Agency for Technology and Innovation (Tekes) T.P.’s work was supported in part by the Academy of Finland grants 205800, 214598, 121703, and 121962. T.P. thank Waldemar von Frenckells stiftelse, Magnus Ehrnrooth Foundation, and Väisälä Foundation for financial support. The Spanish participation is funded by Ministerio de Ciencia e Innovacion through the projects ESP2004-07067-C03-01 and AYA2007-68058- C03-02.

Published
2010
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