Cyndia Yu
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View article: Demonstration of a 1820 channel multiplexer for transition-edge sensor bolometers
Demonstration of a 1820 channel multiplexer for transition-edge sensor bolometers Open
The scalability of most transition-edge sensor arrays is limited by the multiplexing technology which combines their signals over a reduced number of wires and amplifiers. In this Letter, we present and demonstrate a multiplexer design opt…
View article: Predicting Occupant Annoyance in Acoustic-Thermal Compound Environments
Predicting Occupant Annoyance in Acoustic-Thermal Compound Environments Open
With heavy trucks being more widely used in the logistics industry, more and more lorry drivers are frequently exposed to the acoustic-thermal dynamically coupled cockpit environment for a long time. The comfort in the cockpit directly aff…
View article: Quantum metrology of low-frequency electromagnetic modes with frequency upconverters
Quantum metrology of low-frequency electromagnetic modes with frequency upconverters Open
We present the RF Quantum Upconverter (RQU) and describe its application to quantum metrology of electromagnetic modes between dc and the very high frequency band (VHF) (≲300 MHz). The RQU uses a Josephson interferometer made up of superco…
View article: Development of an MKID Frequency-to-Pixel LED Mapper for SPT-3G+
Development of an MKID Frequency-to-Pixel LED Mapper for SPT-3G+ Open
SPT-3G+ is the next-generation camera for the South Pole Telescope (SPT). SPT is designed to measure the cosmic microwave background (CMB) and the mm/sub-mm sky. The planned focal plane consists of 34 000 microwave kinetic inductance detec…
View article: BICEP/Keck XIX: Extremely Thin Composite Polymer Vacuum Windows for BICEP and Other High Throughput Millimeter Wave Telescopes
BICEP/Keck XIX: Extremely Thin Composite Polymer Vacuum Windows for BICEP and Other High Throughput Millimeter Wave Telescopes Open
Millimeter-wave refracting telescopes targeting the degree-scale structure of the cosmic microwave background (CMB) have recently grown to diffraction-limited apertures of over 0.5 meters. These instruments are entirely housed in vacuum cr…
View article: Development of the 220/270 GHz Receiver of BICEP Array
Development of the 220/270 GHz Receiver of BICEP Array Open
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 achieve these goals, one must carefully characterize the Galac…
View article: Crosstalk effects in microwave SQUID multiplexed TES bolometer readout
Crosstalk effects in microwave SQUID multiplexed TES bolometer readout Open
Transition-edge sensor (TES) bolometers are broadly used for background-limited astrophysical measurements from the far-infrared to mm-waves. Many planned future instruments require increasingly large detector arrays, but their scalability…
View article: Crosstalk effects in microwave SQUID multiplexed TES bolometer readout
Crosstalk effects in microwave SQUID multiplexed TES bolometer readout Open
Transition-edge sensor (TES) bolometers are broadly used for background-limited astrophysical measurements from the far-infrared to mm-waves. Many planned future instruments require increasingly large detector arrays, but their scalability…
View article: Results and Limits of Time Division Multiplexing for the BICEP Array High Frequency Receivers
Results and Limits of Time Division Multiplexing for the BICEP Array High Frequency Receivers Open
Time-Division Multiplexing is the readout architecture of choice for many groundand space experiments, as it is a very mature technology with proven outstandinglow-frequency noise stability, which represents a central challenge in multiple…
View article: BICEP/Keck. XVII. Line-of-sight Distortion Analysis: Estimates of Gravitational Lensing, Anisotropic Cosmic Birefringence, Patchy Reionization, and Systematic Errors
BICEP/Keck. XVII. Line-of-sight Distortion Analysis: Estimates of Gravitational Lensing, Anisotropic Cosmic Birefringence, Patchy Reionization, and Systematic Errors Open
We present estimates of line-of-sight distortion fields derived from the 95 and 150 GHz data taken by BICEP2, BICEP3, and the Keck Array up to the 2018 observing season, leading to cosmological constraints and a study of instrumental and a…
View article: BICEP/Keck. XVI. Characterizing Dust Polarization through Correlations with Neutral Hydrogen
BICEP/Keck. XVI. Characterizing Dust Polarization through Correlations with Neutral Hydrogen Open
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 important for both our understanding of astrophysical process…
View article: SLAC microresonator RF (SMuRF) electronics: A tone-tracking readout system for superconducting microwave resonator arrays
SLAC microresonator RF (SMuRF) electronics: A tone-tracking readout system for superconducting microwave resonator arrays Open
We describe the newest generation of the SLAC Microresonator RF (SMuRF) electronics, a warm digital control and readout system for microwave-frequency resonator-based cryogenic detector and multiplexer systems, such as microwave supercondu…
View article: Quantum metrology of low frequency electromagnetic modes with frequency upconverters
Quantum metrology of low frequency electromagnetic modes with frequency upconverters Open
We present the RF Quantum Upconverter (RQU) and describe its application to quantum metrology of electromagnetic modes between dc and the Very High Frequency band (VHF) ($\lesssim$300MHz). The RQU uses a Josephson interferometer made up of…
View article: SLAC Microresonator RF (SMuRF) Electronics: A tone-tracking readout system for superconducting microwave resonator arrays
SLAC Microresonator RF (SMuRF) Electronics: A tone-tracking readout system for superconducting microwave resonator arrays Open
We describe the newest generation of the SLAC Microresonator RF (SMuRF) electronics, a warm digital control and readout system for microwave-frequency resonator-based cryogenic detector and multiplexer systems such as microwave SQUID multi…
View article: Phase Drift Monitoring for Tone Tracking Readout of Superconducting Microwave Resonators
Phase Drift Monitoring for Tone Tracking Readout of Superconducting Microwave Resonators Open
A number of modern millimeter, sub-millimeter, and far-infrared detectors are read out using superconducting microwave (1-10GHz) resonators. The main detector technologies are Transition Edge Sensors, read out using Microwave SQUID Multipl…
View article: A simulation suite for readout with SMuRF tone-tracking electronics
A simulation suite for readout with SMuRF tone-tracking electronics Open
We present the details of a simulation suite for modeling the effects of readout with SLAC Microresonator RF (SMuRF) electronics. The SMuRF electronics are a warm readout and control system for use with superconducting microwave resonator-…
View article: Improved Polarization Calibration of the BICEP3 CMB Polarimeter at the South Pole
Improved Polarization Calibration of the BICEP3 CMB Polarimeter at the South Pole Open
The BICEP3 Polarimeter is a small aperture, refracting telescope, dedicated to the observation of the Cosmic Microwave Background (CMB) at 95GHz. It is designed to target degree angular scale polarization patterns, in particular the very-m…
View article: Improved polarization calibration of the BICEP3 CMB polarimeter at the South Pole
Improved polarization calibration of the BICEP3 CMB polarimeter at the South Pole Open
The BICEP3 Polarimeter is a small aperture, refracting telescope, dedicated to the observation of the Cosmic Microwave Background (CMB) at 95GHz. It is designed to target degree angular scale polarization patterns, in particular the very-m…
View article: 2022 upgrade and improved low frequency camera sensitivity for CMB observation at the South Pole
2022 upgrade and improved low frequency camera sensitivity for CMB observation at the South Pole Open
Constraining the Galactic foregrounds with multi-frequency Cosmic Microwave Background (CMB) observations is an essential step towards ultimately reaching the sensitivity to measure primordial gravitational waves (PGWs), the sign of inflat…
View article: Bicep/Keck XV: The Bicep3 Cosmic Microwave Background Polarimeter and the First Three-year Data Set
Bicep/Keck XV: The Bicep3 Cosmic Microwave Background Polarimeter and the First Three-year Data Set Open
We report on the design and performance of the B icep3 instrument and its first three-year data set collected from 2016 to 2018. B icep3 is a 52 cm aperture refracting telescope designed to observe the polarization of the cosmic microwave …
View article: Simons Observatory: Constraining inflationary gravitational waves with multitracer B -mode delensing
Simons Observatory: Constraining inflationary gravitational waves with multitracer B -mode delensing Open
We introduce and validate a delensing framework for the Simons Observatory (SO), which will be used to improve constraints on inflationary gravitational waves by reducing the lensing noise in measurements of the B modes in CMB polarization…
View article: Plastic Laminate Antireflective Coatings for Millimeter-wave Optics in BICEP Array
Plastic Laminate Antireflective Coatings for Millimeter-wave Optics in BICEP Array Open
The BICEP/Keck series of experiments target the Cosmic Microwave Background at degree-scale resolution from the South Pole. Over the next few years, the "Stage-3" BICEP Array (BA) telescope will improve the program's frequency coverage and…
View article: Analysis of Temperature-to-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018
Analysis of Temperature-to-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018 Open
The BICEP/Keck Array experiment is a series of small-aperture refracting\ntelescopes observing degree-scale Cosmic Microwave Background polarization from\nthe South Pole in search of a primordial $B$-mode signature. As a pair\ndifferencing…
View article: Polarization calibration of the BICEP3 CMB polarimeter at the South Pole
Polarization calibration of the BICEP3 CMB polarimeter at the South Pole Open
International audience
View article: Receiver development for BICEP Array, a next-generation CMB polarimeter at the South Pole
Receiver development for BICEP Array, a next-generation CMB polarimeter at the South Pole Open
A detection of curl-type ($B$-mode) polarization of the primary CMB would be\ndirect evidence for the inflationary paradigm of the origin of the Universe.\nThe BICEP/Keck Array (BK) program targets the degree angular scales, where the\npow…