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Advanced Time-Division Multiplexed Readout Chain for the BICEP Array 90/150 GHz Receiver
B. Cantrall, P. A. R. Ade, Z. Ahmed +89
This work presents the current performance of the advanced time-division multiplexed (TDM) readout chain for the BICEP Array 90/150 GHz receiver. BA4-90/150, scheduled for deployme…
In-Flight Performance of Spider's 280 GHz Receivers
Elle C. Shaw, P. A. R. Ade, S. Akers +84
SPIDER is a balloon-borne instrument designed to map the cosmic microwave background at degree-angular scales in the presence of Galactic foregrounds. SPIDER has mapped a large sky…
In-flight gain monitoring of SPIDER's transition-edge sensor arrays
J. P. Filippini, A. E. Gambrel, A. S. Rahlin +67
Experiments deploying large arrays of transition-edge sensors (TESs) often require a robust method to monitor gain variations with minimal loss of observing time. We propose a sens…
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…
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…
Design and pre-flight performance of SPIDER 280 GHz receivers
E. C. Shaw, P. A. R. Ade, S. Akers +79
In this work we describe upgrades to the Spider balloon-borne telescope in preparation for its second flight, currently planned for December 2021. The Spider instrument is optimize…
Polarization Calibration of the BICEP3 CMB polarimeter at the South Pole
J. Cornelison, P. A. R. Ade, Z. Ahmed +84
The BICEP3 CMB Polarimeter is a small-aperture refracting telescope located at the South Pole and is specifically designed to search for the possible signature of inflationary grav…
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)…
Particle response of antenna-coupled TES arrays: results from SPIDER and the lab
B. Osherson, J. P. Filippini, J. Fu +45
Future mm-wave and sub-mm space missions will employ large arrays of multiplexed Transition Edge Sensor (TES) bolometers. Such instruments must contend with the high flux of cosmic…
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…
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…
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…
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…
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…
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…
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…
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…
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…
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…
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…
280 GHz Focal Plane Unit Design and Characterization for the SPIDER-2 Suborbital Polarimeter
A. S. Bergman, P. A. R. Ade, S. Akers +76
We describe the construction and characterization of the 280 GHz bolometric focal plane units (FPUs) to be deployed on the second flight of the balloon-borne SPIDER instrument. The…
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…
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…
Optical Characterization of the BICEP3 CMB Polarimeter at the South Pole
K. S. Karkare, P. A. R. Ade, Z. Ahmed +56
BICEP3 is a small-aperture refracting cosmic microwave background (CMB) telescope designed to make sensitive polarization maps in pursuit of a potential B-mode signal from inflatio…