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The Keck Array: a pulse tube cooled CMB polarimeter

The Keck Array is a cosmic microwave background (CMB) polarimeter that will begin observing from the South Pole in late 2010. The initial deployment will consist of three telescopes similar to BICEP2 housed in ultra-compact, pulse tube…

Instrumentation and Methods for Astrophysics · Physics 2011-05-02 C. D. Sheehy , P. A. R. Ade , R. W. Aikin , M. Amiri , S. Benton , C. Bischoff , J. J. Bock , J. A. Bonetti , J. A. Brevik , B. Burger , C. D. Dowell , L. Duband , J. P. Filippini , S. R. Golwala , M. Halpern , M. Hasselfield , G. Hilton , V. V. Hristov , K. Irwin , J. P. Kaufman , B. G. Keating , J. M. Kovac , C. L. Kuo , A. E. Lange , E. M. Leitch , M. Lueker , C. B. Netterfield , H. T. Nguyen , R. W. Ogburn , A. Orlando , C. L. Pryke , C. Reintsema , S. Richter , J. E. Ruhl , M. C. Runyan , Z. Staniszewski , S. Stokes , R. Sudiwala , G. Teply , K. L. Thompson , J. E. Tolan , A. D. Turner , P. Wilson , C. L. Wong

The Precursor Small Aperture Telescope (PreSAT) CMB polarimeter

The search for the polarized imprint of primordial gravitational waves in the cosmic microwave background (CMB) as direct evidence of cosmic inflation requires exquisite sensitivity and control over systematics. The next-generation CMB-S4…

Instrumentation and Methods for Astrophysics · Physics 2025-12-30 Matthew A. Petroff , Zeeshan Ahmed , James J. Bock , Marion Dierickx , Sofia Fatigoni , David C. Goldfinger , Paul K. Grimes , Shawn W. Henderson , Kirit S. Karkare , John M. Kovac , Hien T. Nguyen , Scott N. Paine , Anna R. Polish , Clement Pryke , Thibault Romand , Benjamin L. Schmitt , Abigail G. Vieregg

BICEP/Keck XX: Component-separated maps of polarized CMB and thermal dust emission using Planck and BICEP/Keck Observations through the 2018 Observing Season

We present component-separated polarization maps of the cosmic microwave background (CMB) and Galactic thermal dust emission, derived using data from the BICEP/Keck experiments through the 2018 observing season and Planck. By employing a…

Cosmology and Nongalactic Astrophysics · Physics 2026-02-02 Keck Collaboration , P. A. R. Ade , Z. Ahmed , M. Amiri , D. Barkats , R. Basu Thakur , C. A. Bischoff , D. Beck , J. J. Bock , H. Boenish , V. Buza , B. Cantrall , J. R. Cheshire , J. Connors , J. Cornelison , M. Crumrine , A. J. Cukierman , E. Denison , L. Duband , M. Echter , M. Eiben , B. D. Elwood , S. Fatigoni , J. P. Filippini , A. Fortes , M. Gao , C. Giannakopoulos , N. Goeckner-Wald , D. C. Goldfinger , S. Gratton , J. A. Grayson , A. Greathouse , P. K. Grimes , G. Hall , G. Halal , M. Halpern , E. Hand , S. A. Harrison , S. Henderson , T. D. Hoang , J. Hubmayr , H. Hui , K. D. Irwin , J. H. Kang , K. S. Karkare , S. Kefeli , J. M. Kovac , C. Kuo , K. Lasko , K. K. Lau , M. Lautzenhiser , A. Lennox , T. Liu , S. Mackey , N. Maher , K. G. Megerian , L. Minutolo , L. Moncelsi , Y. Nakato , H. T. Nguyen , R. OBrient , S. N. Paine , A. Patel , M. A. Petroff , A. R. Polish , T. Prouve , C. Pryke , C. D. Reintsema , S. Richter , T. Romand , M. Salatino , A. Schillaci , B. Schmitt , R. Schwartz , C. D. Sheehy , B. Singari , A. Soliman , T. St. Germaine , A. Steiger , B. Steinbach , R. Sudiwala , G. Teply , K. L. Thompson , C. Tucker , A. D. Turner , C. Vergès , A. G. Vieregg , A. Wandui , A. C. Weber , J. Willmert , C. L. Wong , W. L. K. Wu , H. Yang , C. Yu , L. Zheng , C. Zhang , S. Zhang

Litmus Test for Cosmic Hemispherical Asymmetry in the Cosmic Microwave Background B-mode polarization

Recent measurements of the temperature field of Cosmic Microwave Background (CMB) provide tantalising evidence for violation of Statistical Isotropy (SI) that constitutes a fundamental tenet of contemporary cosmology. CMB space based…

Cosmology and Nongalactic Astrophysics · Physics 2016-06-08 Suvodip Mukherjee , Tarun Souradeep

Benchmark Parameters for CMB Polarization Experiments

The recently detected polarization of the cosmic microwave background (CMB) holds the potential for revealing the physics of inflation and gravitationally mapping the large-scale structure of the universe, if so called B-mode signals below…

Astrophysics · Physics 2011-05-12 Wayne Hu , Matthew M. Hedman , Matias Zaldarriaga

EBEX: A balloon-borne CMB polarization experiment

EBEX is a NASA-funded balloon-borne experiment designed to measure the polarization of the cosmic microwave background (CMB). Observations will be made using 1432 transition edge sensor (TES) bolometric detectors read out with frequency…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Britt Reichborn-Kjennerud , Asad M. Aboobaker , Peter Ade , Françcois Aubin , Carlo Baccigalupi , Chaoyun Bao , Julian Borrill , Christopher Cantalupo , Daniel Chapman , Joy Didier , Matt Dobbs , Julien Grain , William Grainger , Shaul Hanany , Seth Hillbrand , Johannes Hubmayr , Andrew Jaffe , Bradley Johnson , Terry Jones , Theodore Kisner , Jeff Klein , Andrei Korotkov , Sam Leach , Adrian Lee , Lorne Levinson , Michele Limon , Kevin MacDermid , Tomotake Matsumura , Xiaofan Meng , Amber Miller , Michael Milligan , Enzo Pascale , Daniel Polsgrove , Nicolas Ponthieu , Kate Raach , Ilan Sagiv , Graeme Smecher , Federico Stivoli , Radek Stompor , Huan Tran , Matthieu Tristram , Gregory S. Tucker , Yury Vinokurov , Amit Yadav , Matias Zaldarriaga , Kyle Zilic

CLASS Angular Power Spectra and Map-Component Analysis for 40 GHz Observations through 2022

Measurement of the largest angular scale ($\ell < 30$) features of the cosmic microwave background (CMB) polarization is a powerful way to constrain the optical depth to reionization and search for the signature of inflation through the…

Cosmology and Nongalactic Astrophysics · Physics 2024-02-15 Joseph R. Eimer , Yunyang Li , Michael K. Brewer , Rui Shi , Aamir Ali , John W. Appel , Charles L. Bennett , Sarah Marie Bruno , Ricardo Bustos , David T. Chuss , Joseph Cleary , Sumit Dahal , Rahul Datta , Jullianna Denes Couto , Kevin L. Denis , Rolando Dünner , Thomas Essinger-Hileman , Pedro Fluxá , Johannes Hubmayer , Kathleen Harrington , Jeffrey Iuliano , John Karakla , Tobias A. Marriage , Carolina Núñez , Lucas Parker , Matthew A. Petroff , Rodrigo A. Reeves , Karwan Rostem , Deniz A. N. Valle , Duncan J. Watts , Janet L. Weiland , Edward J. Wollack , Zhilei Xu , Lingzhen Zeng

BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season

We present results from an analysis of all data taken by the BICEP2, Keck Array and BICEP3 CMB polarization experiments up to and including the 2018 observing season. We add additional Keck Array observations at 220 GHz and BICEP3…

Cosmology and Nongalactic Astrophysics · Physics 2021-10-13 Keck Collaboration , P. A. R. Ade , Z. Ahmed , M. Amiri , D. Barkats , R. Basu Thakur , D. Beck , C. Bischoff , J. J. Bock , H. Boenish , E. Bullock , V. Buza , J. R. Cheshire , J. Connors , J. Cornelison , M. Crumrine , A. Cukierman , E. V. Denison , M. Dierickx , L. Duband , M. Eiben , S. Fatigoni , J. P. Filippini , S. Fliescher , N. Goeckner-Wald , D. C. Goldfinger , J. Grayson , P. Grimes , G. Halal , G. Hall , M. Halpern , E. Hand , S. Harrison , S. Henderson , S. R. Hildebrandt , G. C. Hilton , J. Hubmayr , H. Hui , K. D. Irwin , J. Kang , K. S. Karkare , E. Karpel , S. Kefeli , S. A. Kernasovskiy , J. M. Kovac , C. L. Kuo , K. Lau , E. M. Leitch , A. Lennox , K. G. Megerian , L. Minutolo , L. Moncelsi , Y. Nakato , T. Namikawa , H. T. Nguyen , R. O'Brient , R. W. Ogburn , S. Palladino , T. Prouve , C. Pryke , B. Racine , C. D. Reintsema , S. Richter , A. Schillaci , B. L. Schmitt , R. Schwarz , C. D. Sheehy , A. Soliman , T. St Germaine , B. Steinbach , R. V. Sudiwala , G. P. Teply , K. L. Thompson , J. E. Tolan , C. Tucker , A. Turner , C. Umilta , C. Verges , A. G. Vieregg , A. Wandui , A. C. Weber , D. V. Wiebe , J. Willmert , C. L. Wong , W. L. K. Wu , H. Yang , K. W. Yoon , E. Young , C. Yu , L. Zeng , C. Zhang , S. Zhang

Can weak lensing surveys confirm BICEP2 ?

The detection of B-modes in the Cosmic Microwave Background (CMB) polarization by the BICEP2 experiment, if interpreted as evidence for a primordial gravitational wave background, has enormous ramifications for cosmology and physics. It is…

Cosmology and Nongalactic Astrophysics · Physics 2016-11-29 Nora Elisa Chisari , Cora Dvorkin , Fabian Schmidt

A Cosmic Microwave Background Radiation Polarimeter Using Superconducting Bearings

Measurements of the polarization of the cosmic microwave background (CMB) radiation are expected to significantly increase our understanding of the early universe. We present a design for a CMB polarimeter in which a cryogenically cooled…

Astrophysics · Physics 2016-11-17 S. Hanany , T. Matsumura , B. Johnson , T. Jones , J. R. Hull , K. B. Ma

Multi-chroic dual-polarization bolometric detectors for studies of the Cosmic Microwave Background

We are developing multi-chroic antenna-coupled TES detectors for CMB polarimetry. Multi-chroic detectors increase the mapping speed per focal plane area and provide greater discrimination of polarized galactic foregrounds with no increase…

Instrumentation and Methods for Astrophysics · Physics 2012-11-01 Aritoki Suzuki , Kam Arnold , Jennifer Edwards , Greg Engargiola , Adnan Ghribi , William Holzapfel , Adrian T. Lee , Xiao Fan Meng , Michael J. Myers , Roger O'Brient , Erin Quealy , Gabriel Rebeiz , Paul Richards , Darin Rosen , Praween Siritanasak

A Measurement of the Cosmic Microwave Background $B$-Mode Polarization Power Spectrum at Sub-Degree Scales from 2 years of POLARBEAR Data

We report an improved measurement of the cosmic microwave background (CMB) $B$-mode polarization power spectrum with the POLARBEAR experiment at 150 GHz. By adding new data collected during the second season of observations (2013-2014) to…

Cosmology and Nongalactic Astrophysics · Physics 2017-10-31 The POLARBEAR Collaboration , P. A. R. Ade , M. Aguilar , Y. Akiba , K. Arnold , C. Baccigalupi , D. Barron , D. Beck , F. Bianchini , D. Boettger , J. Borrill , S. Chapman , Y. Chinone , K. Crowley , A. Cukierman , M. Dobbs , A. Ducout , R. Dünner , T. Elleflot , J. Errard , G. Fabbian , S. M. Feeney , C. Feng , T. Fujino , N. Galitzki , A. Gilbert , N. Goeckner-Wald , J. Groh , T. Hamada , G. Hall , N. W. Halverson , M. Hasegawa , M. Hazumi , C. Hill , L. Howe , Y. Inoue , G. C. Jaehnig , A. H. Jaffe , O. Jeong , D. Kaneko , N. Katayama , B. Keating , R. Keskitalo , T. Kisner , N. Krachmalnicoff , A. Kusaka , M. Le Jeune , A. T. Lee , E. M. Leitch , D. Leon , E. Linder , L. Lowry , F. Matsuda , T. Matsumura , Y. Minami , J. Montgomery , M. Navaroli , H. Nishino , H. Paar , J. Peloton , A. T. P. Pham , D. Poletti , G. Puglisi , C. L. Reichardt , P. L. Richards , C. Ross , Y. Segawa , B. D. Sherwin , M. Silva-Feaver , P. Siritanasak , N. Stebor , R. Stompor , A. Suzuki , O. Tajima , S. Takakura , S. Takatori , D. Tanabe , G. P. Teply , T. Tomaru , C. Tucker , N. Whitehorn , A. Zahn

The local B-polarization of the CMB: a very sensitive probe of cosmic defects

We present a new and especially powerful signature of cosmic strings and other topological or non-topological defects in the polarization of the cosmic microwave background (CMB). We show that even if defects contribute 1% or less in the…

Cosmology and Nongalactic Astrophysics · Physics 2011-01-27 Juan Garcia-Bellido , Ruth Durrer , Elisa Fenu , Daniel G. Figueroa , Martin Kunz

Isotropy-Violation Diagnostics for $B$-mode Polarization Foregrounds to the Cosmic Microwave Background

Isotropy-violation statistics can highlight polarized galactic foregrounds that contaminate primordial $B$-modes in the Cosmic Microwave Background (CMB). We propose a particular isotropy-violation test and apply it to polarized Planck 353…

Cosmology and Nongalactic Astrophysics · Physics 2016-09-23 Aditya Rotti , Kevin Huffenberger

Thermal Testing for Cryogenic CMB Instrument Optical Design

Observations of the Cosmic Microwave Background rely on cryogenic instrumentation with cold detectors, readout, and optics providing the low noise performance and instrumental stability required to make more sensitive measurements. It is…

Instrumentation and Methods for Astrophysics · Physics 2022-08-05 D. C. Goldfinger , P. A. R. Ade , Z. Ahmed , M. Amiri , D. Barkats , R. Basu Thakur , D. Beck , C. A. Bischoff , J. J. Bock , V. Buza , J. Cheshire , J. Connors , J. Cornelison , M. Crumrine , A. J. Cukierman , E. V. Denison , M. I. Dierickx , L. Duband , M. Eiben , S. Fatigoni , J. P. Filippini , C. Giannakopoulos , N. Goeckner-Wald , J. Grayson , P. K. Grimes , G. Hall , G. Halal , M. Halpern , E. Hand , S. A. Harrison , S. Henderson , S. R. Hildebrandt , G. C. Hilton , J. Hubmayk , H. Hui , K. D. Irwin , J. Kang , K. S. Karkare , S. Kefeli , J. M. Kovac , C. L. Kuo , K. Lau , E. M. Leitch , A. Lennox , T. Liu , K. G. Megerian , L. Minutolo , L. Moncelsi , Y. Nakato , T. Namikawa , H. T. Nguyen , R. O'Brient , S. Palladino , M. A. Petroff , T. Prouve , C. Pryke , B. Racine , C. D. Reintsema , M. Salatino , A. Schillaci , B. L. Schmitt , B. Singari , A. Soliman , A. G. Smith , T. St. Germaine , B. Steinbach , R. V. Sudiwala , K. L. Thompson , C. Tsai , C. Tucker , A. D. Turner , C. Umiltà , C. Vergès , A. G. Vieregg , A. Wandui , A. C. Weber , D. V. Wiebe , J. Willmert , W. L. K. Wu , H. Yang , K. W. Yoon , E. Young , C. Yu , L. Zeng , C. Zhang , S. Zhang

A ThermalKinetic Inductance Detectors Pixel Design for Cosmic Microwave Background Observations at 90/150 GHz bands

The highly sensitive millimeter-wave telescope is an important tool for accurate measurement of Cosmic Microwave Background (CMB) radiation, and its core component is a detector array located in a cryogenic focal plane. The feasibility of…

Instrumentation and Methods for Astrophysics · Physics 2024-01-29 Ye Chai , Shibo Shu , Yongping Li , Jiamin Sun , Zhouhui Liu , Yu Xu , Daikang Yan , Zhengwei Li , Yang Liu , Yiwen Wang , Weijie Guo , Juexian Cao , Congzhan Liu

Design and characterization of the POLARBEAR-2b and POLARBEAR-2c cosmic microwave background cryogenic receivers

The POLARBEAR-2/Simons Array Cosmic Microwave Background (CMB) polarization experiment is an upgrade and expansion of the existing POLARBEAR-1 (PB-1) experiment, located in the Atacama desert in Chile. Along with the CMB temperature and…

Instrumentation and Methods for Astrophysics · Physics 2018-06-15 Logan Howe , Calvin Tsai , Lindsay Lowry , Kam Arnold , Gabriele Coppi , John Groh , Xiaoyu Guo , Brian Keating , Adrian Lee , Andrew J. May , Lucio Piccirillo , Nathan Stebor , Grant Teply

Requirements for future CMB satellite missions: photometric and band-pass response calibration

Current and future Cosmic Microwave Background (CMB) Radiation experiments are targeting the polarized $B$-mode signal. The small amplitude of this signal makes a successful measurement challenging for current technologies. Therefore, very…

Instrumentation and Methods for Astrophysics · Physics 2020-11-18 Tommaso Ghigna , Tomotake Matsumura , Guillaume Patanchon , Hirokazu Ishino , Masashi Hazumi

Measurements of B-mode Polarization of the Cosmic Microwave Background from 500 Square Degrees of SPTpol Data

We report a B-mode power spectrum measurement from the cosmic microwave background (CMB) polarization anisotropy observations made using the SPTpol instrument on the South Pole Telescope. This work uses 500 deg$^2$ of SPTpol data, a…

Cosmology and Nongalactic Astrophysics · Physics 2020-07-01 J. T. Sayre , C. L. Reichardt , J. W. Henning , P. A. R. Ade , A. J. Anderson , J. E. Austermann , J. S. Avva , J. A. Beall , A. N. Bender , B. A. Benson , F. Bianchini , L. E. Bleem , J. E. Carlstrom , C. L. Chang , H. C. Chiang , R. Citron , C. Corbett Moran , T. M. Crawford , A. T. Crites , T. de Haan , M. A. Dobbs , W. Everett , J. Gallicchio , E. M. George , A. Gilbert , N. Gupta , N. W. Halverson , N. Harrington , G. C. Hilton , G. P. Holder , W. L. Holzapfel , J. D. Hrubes , N. Huang , J. Hubmayr , K. D. Irwin , L. Knox , A. T. Lee , D. Li , A. Lowitz , J. J. McMahon , S. S. Meyer , L. M. Mocanu , J. Montgomery , A. Nadolski , T. Natoli , J. P. Nibarger , G. Noble , V. Novosad , S. Padin , S. Patil , C. Pryke , J. E. Ruhl , B. R. Saliwanchik , K. K. Schaffer , C. Sievers , G. Smecher , A. A. Stark , C. Tucker , K. Vanderlinde , T. Veach , J. D. Vieira , G. Wang , N. Whitehorn , W. L. K. Wu , V. Yefremenko

Constraining cosmic polarization rotation and implications for primordial B-modes

Cosmological Birefringence (CB) is a phenomenon, caused by parity violating modifications to electrodynamics, whereby the linear polarisation angle of light changes as photons traverse a vacuum. It is possible to use a number of different…

Cosmology and Nongalactic Astrophysics · Physics 2020-09-04 Joel Williams , Aditya Rotti , Richard Battye