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We present a search for axion-like polarization oscillations in the cosmic microwave background (CMB) with observations from the Keck Array. A local axion field induces an all-sky, temporally sinusoidal rotation of CMB polarization. A CMB…

The Polarbear Cosmic Microwave Background (CMB) polarization experiment is currently observing from the Atacama Desert in Northern Chile. It will characterize the expected B-mode polarization due to gravitational lensing of the CMB, and…

We describe a space-borne, multi-band, multi-beam polarimeter aiming at a precise and accurate measurement of the polarization of the Cosmic Microwave Background. The instrument is optimized to be compatible with the strict budget…

Instrumentation and Methods for Astrophysics · Physics 2019-08-13 P. de Bernardis , P. A. R. Ade , J. J. A. Baselmans , E. S. Battistelli , A. Benoit , M. Bersanelli , A. Bideaud , M. Calvo , F. J. Casas , G. Castellano , A. Catalano , I. Charles , I. Colantoni , F. Columbro , A. Coppolecchia , M. Crook , G. D'Alessandro , M. De Petris , J. Delabrouille , S. Doyle , C. Franceschet , A. Gomez , J. Goupy , S. Hanany , M. Hills , L. Lamagna , J. Macias-Perez , B. Maffei , S. Martin , E. Martinez-Gonzalez , S. Masi , D. McCarthy , A. Mennella , A. Monfardini , F. Noviello , A. Paiella , F. Piacentini , M. Piat , G. Pisano , G. Signorelli , C. Y. Tan , A. Tartari , N. Trappe , S. Triqueneaux , C. Tucker , G. Vermeulen , K. Young , M. Zannoni , A. Achúcarro , R. Allison , M. Ashdown , M. Ballardini , A. J. Banday , R. Banerji , J. Bartlett , N. Bartolo , S. Basak , A. Bonaldi , M. Bonato , J. Borrill , F. Bouchet , F. Boulanger , T. Brinckmann , M. Bucher , C. Burigana , A. Buzzelli , Z. Y. Cai , C. S. Carvalho , A. Challinor , J. Chluba , S. Clesse , G. De Gasperis , G. De Zotti , E. Di Valentino , J. M. Diego , J. Errard , S. Feeney , R. Fernandez-Cobos , F. Finelli , F. Forastieri , S. Galli , R. Génova-Santos , M. Gerbino , J. González-Nuevo , S. Hagstotz , J. Greenslade , W. Handley , C. Hernández-Monteagudo , C. Hervias-Caimapo , E. Hivon , K. Kiiveri , T. Kisner , T. Kitching , M. Kunz , H. Kurki-Suonio , A. Lasenby , M. Lattanzi , J. Lesgourgues , A. Lewis , M. Liguori , V. Lindholm , G. Luzzi , C. J. A. P. Martins , A. Melchiorri , J. B. Melin , D. Molinari , P. Natoli , M. Negrello , A. Notari , D. Paoletti , G. Patanchon , L. Polastri , G. Polenta , A. Pollo , V. Poulin , M. Quartin , M. Remazeilles , M. Roman , J. A. Rubiño-Martín , L. Salvati , M. Tomasi , D. Tramonte , T. Trombetti , J. Väliviita , R. Van de Weijgaert , B. van Tent , V. Vennin , P. Vielva , N. Vittorio

We describe the design and performance of polarization selective antenna-coupled TES arrays that will be used in several upcoming Cosmic Microwave Background (CMB) experiments: SPIDER, BICEP-2/SPUD. The fully lithographic polarimeter arrays…

We describe the design and expected performance of Clover, a new instrument designed to measure the B-mode polarization of the cosmic microwave background. The proposed instrument will comprise three independent telescopes operating at 90,…

Cosmic Microwave Background (CMB) polarimeters aspire to measure the faint $B$-mode signature predicted to arise from inflationary gravitational waves. They also have the potential to constrain cosmic birefringence which would produce…

[Abridged] Recent results from the BICEP, Keck Array and Planck Collaborations demonstrate that Galactic foregrounds are an unavoidable obstacle in the search for evidence of inflationary gravitational waves in the cosmic microwave…

Cosmology and Nongalactic Astrophysics · Physics 2016-04-07 Josquin Errard , Stephen M. Feeney , Hiranya V. Peiris , Andrew H. Jaffe

Multi-chroic polarization sensitive detectors offer an avenue to increase both the spectral coverage and sensitivity of instruments optimized for observations of the cosmic-microwave background (CMB) or sub-mm sky. We report on an effort to…

Instrumentation and Methods for Astrophysics · Physics 2015-06-03 J. McMahon , J. Beall , D. Becker , H. M. Cho , R. Datta. A. Fox , N. Halverson , J. Hubmayr , K. Irwin , J. Nibarger , M. Niemack , H. Smith

Cosmic birefringence is a hypothesized parity violation in electromagnetism that predicts a frequency-independent polarization rotation as light propagates. This would rotate the light from the Cosmic Microwave Background, producing an…

We present estimates of line-of-sight distortion fields derived from the 95 GHz and 150 GHz data taken by BICEP2, BICEP3, and Keck Array up to the 2018 observing season, leading to cosmological constraints and a study of instrumental and…

Detecting B-mode polarization anisotropies on large angular scales in the CMB polarization pattern is one of the major challenges in modern observational cosmology since it would give us an important evidence in favor of the inflationary…

Instrumentation and Methods for Astrophysics · Physics 2020-09-04 Federico Incardona

Current large-aperture cosmic microwave background (CMB) telescopes have nearly maximized the number of detectors that can be illuminated while maintaining diffraction-limited image quality. The polarization-sensitive detector arrays being…

Instrumentation and Methods for Astrophysics · Physics 2016-04-20 Michael D. Niemack

We report on the development of a polarization-sensitive dichroic (150/220 GHz) detector array for the Cosmology Large Angular Scale Surveyor (CLASS) delivered to the telescope site in June 2019. In concert with existing 40 and 90 GHz…

[Abridged] The measurement of the polarization of the Cosmic Microwave Background radiation is one of the current frontiers in cosmology. In particular, the detection of the primordial B-modes, could reveal the presence of gravitational…

Instrumentation and Methods for Astrophysics · Physics 2021-08-10 The LSPE collaboration , G. Addamo , P. A. R. Ade , C. Baccigalupi , A. M. Baldini , P. M. Battaglia , E. S. Battistelli , A. Baù , P. de Bernardis , M. Bersanelli , M. Biasotti , A. Boscaleri , B. Caccianiga , S. Caprioli , F. Cavaliere , F. Cei , K. A. Cleary , F. Columbro , G. Coppi , A. Coppolecchia , F. Cuttaia , G. D'Alessandro , G. De Gasperis , M. De Petris , V. Fafone , F. Farsian , L. Ferrari Barusso , F. Fontanelli , C. Franceschet , T. C. Gaier , L. Galli , F. Gatti , R. Genova-Santos , M. Gerbino , M. Gervasi , T. Ghigna , D. Grosso , A. Gruppuso , R. Gualtieri , F. Incardona , M. E. Jones , P. Kangaslahti , N. Krachmalnicoff , L. Lamagna , M. Lattanzi , C. H. López-Caraballo , M. Lumia , R. Mainini , D. Maino , S. Mandelli , M. Maris , S. Masi , S. Matarrese , A. May , L. Mele , P. Mena , A. Mennella , R. Molina , D. Molinari , G. Morgante , U. Natale , F. Nati , P. Natoli , L. Pagano , A. Paiella , F. Panico , F. Paonessa , S. Paradiso , A. Passerini , M. Perez-de-Taoro , O. A. Peverini , F. Piacentini , L. Piccirillo , G. Pisano , D. Poletti , G. Presta , S. Realini , N. Reyes , J. A. Rubino-Martin , M. Sandri , S. Sartor , F. Pezzotta , G. Polenta , A. Rocchi , A. Schillaci , G. Signorelli , B. Siri , M. Soria , F. Spinella , V. Tapia , A. Tartari , A. C. Taylor , L. Terenzi , M. Tomasi , E. Tommasi , C. Tucker , D. Vaccaro , D. M. Vigano , F. Villa , G. Virone , N. Vittorio , A. Volpe , R. E. J. Watkins , A. Zacchei , M. Zannoni

We describe the Cosmic Microwave Background (CMB) polarization experiment called Polarbear. This experiment will use the dedicated Huan Tran Telescope equipped with a powerful 1,200-bolometer array receiver to map the CMB polarization with…

The B-Machine Telescope is the culmination of several years of development, construction, characterization and observation. The telescope is a departure from standard polarization chopping of correlation receivers to a half wave plate…

Instrumentation and Methods for Astrophysics · Physics 2013-11-11 Brian D. Williams

The Advanced ACTPol upgrade on the Atacama Cosmology Telescope aims to improve the measurement of the cosmic microwave background anisotropies and polarization, using four new dichroic detector arrays fabricated on 150-mm silicon wafers.…