Publications (33)
BICEP2 / Keck Array x: Constraints on Primordial Gravitational Waves using Planck, WMAP, and New BICEP2/Keck Observations through the 2015 Season
Keck Array, BICEP2 Collaborations, : +78
We present results from an analysis of all data taken by the BICEP2/Keck CMB polarization experiments up to and including the 2015 observing season. This includes the first Keck Ar…
Measurements of Degree-Scale B-mode Polarization with the BICEP/Keck Experiments at South Pole
Keck Collaboration, P. A. R. Ade, Z. Ahmed +76
The BICEP and Keck Array experiments are a suite of small-aperture refracting telescopes observing the microwave sky from the South Pole. They target the degree-scale B-mode polari…
BICEP Array: a multi-frequency degree-scale CMB polarimeter
Howard Hui, P. A. R. Ade, Z. Ahmed +75
BICEP Array is the newest multi-frequency instrument in the BICEP/Keck Array program. It is comprised of four 550 mm aperture refractive telescopes observing the polarization of th…
BICEP2 / Keck Array XI: Beam Characterization and Temperature-to-Polarization Leakage in the BK15 Dataset
Keck Array, BICEP2 Collaborations, : +76
Precision measurements of cosmic microwave background (CMB) polarization require extreme control of instrumental systematics. In a companion paper we have presented cosmological co…
BICEP2 / Keck Array VIII: Measurement of gravitational lensing from large-scale B-mode polarization
The Keck Array, BICEP2 Collaborations, : +63
We present measurements of polarization lensing using the 150 GHz maps which include all data taken by the BICEP2 & Keck Array CMB polarization experiments up to and including the…
Microwave multiplexing on the Keck Array
Ari Cukierman, Zeeshan Ahmed, Shawn Henderson +82
We describe an on-sky demonstration of a microwave-multiplexing readout system in one of the receivers of the Keck Array, a polarimetry experiment observing the cosmic microwave ba…
Optical Design and Characterization of 40-GHz Detector and Module for the BICEP Array
A. Soliman, P. A. R. Ade, Z. Ahmed +66
Families of cosmic inflation models predict a primordial gravitational-wave background that imprints B-mode polarization pattern in the Cosmic Microwave Background (CMB). High sens…
BICEP / Keck XII: Constraints on axion-like polarization oscillations in the cosmic microwave background
Keck Collaboration, P. A. R. Ade, Z. Ahmed +79
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,…
BICEP Array: 150 GHz detector module development
A. Schillaci, P. A. R. Ade, Z. Ahmed +81
The BICEP/Keck Collaboration is currently leading the quest to the highest sensitivity measurements of the polarized CMB anisotropies on degree scale with a series of cryogenic tel…
The Latest Constraints on Inflationary B-modes from the BICEP/Keck Telescopes
Keck Collaboration, P. A. R. Ade, Z. Ahmed +92
For the past decade, the BICEP/Keck collaboration has been operating a series of telescopes at the Amundsen-Scott South Pole Station measuring degree-scale -mode polarization im…
BICEP3 performance overview and planned Keck Array upgrade
J. A. Grayson, P. A. R. Ade, Z. Ahmed +56
BICEP3 is a 520 mm aperture, compact two-lens refractor designed to observe the polarization of the cosmic microwave background (CMB) at 95 GHz. Its focal plane consists of modular…
BICEP Array cryostat and mount design
M. Crumrine, P. A. R. Ade, Z. Ahmed +74
Bicep Array is a cosmic microwave background (CMB) polarization experiment that will begin observing at the South Pole in early 2019. This experiment replaces the five Bicep2 style…
BICEP2 / Keck Array VI: Improved Constraints On Cosmology and Foregrounds When Adding 95 GHz Data From Keck Array
Keck Array, BICEP2 Collaborations, : +60
We present results from an analysis of all data taken by the BICEP2 & Keck Array CMB polarization experiments up to and including the 2014 observing season. This includes the first…
2017 upgrade and performance of BICEP3: a 95GHz refracting telescope for degree-scale CMB polarization
Jae Hwan Kang, P. A. R. Ade, Z. Ahmed +74
BICEP3 is a 520mm aperture on-axis refracting telescope observing the polarization of the cosmic microwave background (CMB) at 95GHz in search of the B-mode signal originating from…
Active Radiation Shield for Space Exploration Missions (ARSSEM)
R. Battiston, W. J. Burger, V. Calvelli +10
One of the major issues to be solved is the protection from the effects of ionizing radiation. Exploration mission, lasting two to three years in space, represents a very significa…
Receiver development for BICEP Array, a next-generation CMB polarimeter at the South Pole
L. Moncelsi, P. A. R. Ade, Z. Ahmed +72
A detection of curl-type (-mode) polarization of the primary CMB would be direct evidence for the inflationary paradigm of the origin of the Universe. The BICEP/Keck Array (BK)…
Design and performance of the first BICEP Array receiver
A. Schillaci, P. A. R. Ade, Z. Ahmed +66
Branches of cosmic inflationary models, such as slow-roll inflation, predict a background of primordial gravitational waves that imprints a unique odd-parity B-mode pattern in the…
BICEP / Keck XV: The BICEP3 CMB Polarimeter and the First Three Year Data Set
Keck Collaboration, P. A. R. Ade, Z. Ahmed +89
We report on the design and performance of the BICEP3 instrument and its first three-year data set collected from 2016 to 2018. BICEP3 is a 52cm aperture, refracting telescope desi…
Development of the 220/270 GHz Receiver of BICEP Array
Keck Collaboration, Y. Nakato, P. A. R. Ade +82
Measurements of B-mode polarization in the CMB sourced from primordial gravitational waves would provide information on the energy scale of inflation and its potential form. To ach…
BICEP / Keck XVII: Line of Sight Distortion Analysis: Estimates of Gravitational Lensing, Anisotropic Cosmic Birefringence, Patchy Reionization, and Systematic Errors
Keck Collaboration, P. A. R. Ade, Z. Ahmed +91
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…
A Demonstration of Improved Constraints on Primordial Gravitational Waves with Delensing
BICEP/Keck, SPTpol Collaborations, : +139
We present a constraint on the tensor-to-scalar ratio, , derived from measurements of cosmic microwave background (CMB) polarization -modes with "delensing," whereby the unce…
Characterizing the Sensitivity of 40 GHz TES Bolometers for BICEP Array
C. Zhang, P. A. R. Ade, Z. Ahmed +66
The BICEP/Keck (BK) experiment aims to detect the imprint of primordial gravitational waves in the Cosmic Microwave Background polarization, which would be direct evidence of the i…
The liquid-hydrogen absorber for MICE
V. Bayliss, J. Boehm, T. Bradshaw +14
The Muon Ionization Cooling Experiment (MICE) has been built at the STFC Rutherford Appleton Laboratory to demonstrate the principle of muon beam phase-space reduction via ionizati…
BICEP2 / Keck Array IX: New Bounds on Anisotropies of CMB Polarization Rotation and Implications for Axion-Like Particles and Primordial Magnetic Fields
Keck Array, BICEP2 Collaborations, : +65
We present the strongest constraints to date on anisotropies of cosmic microwave background (CMB) polarization rotation derived from 150 GHz data taken by the BICEP2/Keck Array CMB…
Ultra-Thin Large-Aperture Vacuum Windows for Millimeter Wavelengths Receivers
Denis Barkats, Marion I. Dierickx, John M. Kovac +75
Targeting faint polarization patterns arising from Primordial Gravitational Waves in the Cosmic Microwave Background requires excellent observational sensitivity. Optical elements…
BICEP3 focal plane design and detector performance
H. Hui, P. A. R. Ade, Z. Ahmed +56
BICEP3, the latest telescope in the BICEP/Keck program, started science observations in March 2016. It is a 550mm aperture refractive telescope observing the polarization of the co…
Design and performance of wide-band corrugated walls for the BICEP Array detector modules at 30/40 GHz
A. Soliman, P. A. R. Ade, Z. Ahmed +75
BICEP Array is a degree-scale Cosmic Microwave Background (CMB) experiment that will search for primordial B-mode polarization while constraining Galactic foregrounds. BICEP Array…
BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
Keck Collaboration, P. A. R. Ade, Z. Ahmed +89
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 additi…
Constraining Inflation with the BICEP/Keck CMB Polarization Experiments
Keck Collaboration, P. A. R. Ade, Z. Ahmed +84
The BICEP/ (BK) series of cosmic microwave background (CMB) polarization experiments has, over the past decade and a half, produced a series of field-leading constra…
BICEP / Keck XIV: Improved constraints on axion-like polarization oscillations in the cosmic microwave background
Keck Collaboration, P. A. R. Ade, Z. Ahmed +89
We present an improved search for axion-like polarization oscillations in the cosmic microwave background (CMB) with observations from the Keck Array. An all-sky, temporally sinuso…
Optical characterization of the Keck Array and BICEP3 CMB Polarimeters from 2016 to 2019
Keck Collaboration, T. St Germaine, P. A. R. Ade +71
The BICEP/Keck experiment (BK) is a series of small-aperture refracting telescopes observing degree-scale Cosmic Microwave Background (CMB) polarization from the South Pole in sear…
BICEP / Keck XVI: Characterizing Dust Polarization through Correlations with Neutral Hydrogen
Keck Collaboration, P. A. R. Ade, Z. Ahmed +92
We characterize Galactic dust filaments by correlating BICEP/Keck and Planck data with polarization templates based on neutral hydrogen (H I) observations. Dust polarization is imp…
BICEP2 / Keck Array VII: Matrix based E/B Separation applied to BICEP2 and the Keck Array
Keck Array, BICEP2 Collaborations, : +63
A linear polarization field on the sphere can be uniquely decomposed into an E-mode and a B-mode component. These two components are analytically defined in terms of spin-2 spheric…