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Observing low elevation sky and the CMB Cold Spot with BICEP3 at the South Pole
J. Kang, P. A. R. Ade, Z. Ahmed +84
BICEP3 is a 520 mm aperture on-axis refracting telescope at the South Pole, which observes the polarization of the cosmic microwave background (CMB) at 95 GHz to search for the B-m…
The Simons Observatory: the Large Aperture Telescope Receiver (LATR) Integration and Validation Results
Zhilei Xu, Tanay Bhandarkar, Gabriele Coppi +42
The Simons Observatory (SO) will observe the cosmic microwave background (CMB) from Cerro Toco in the Atacama Desert of Chile. The observatory consists of three 0.5 m Small Apertur…
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…
The Simons Observatory: Magnetic Sensitivity Measurements of Microwave SQUID Multiplexers
Eve M. Vavagiakis, Zeeshan Ahmed, Aamir Ali +30
The Simons Observatory (SO) will be a cosmic microwave background (CMB) survey experiment with three small-aperture telescopes and one large-aperture telescope, which will observe…
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)…
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…
A Microwave SQUID Multiplexer Optimized for Bolometric Applications
B. Dober, Z. Ahmed, K. Arnold +27
A microwave SQUID multiplexer (MUX) has been optimized for coupling to large arrays of superconducting transition-edge sensor (TES) bolometers. We present the scalable cryogenic…
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…