Hsiao-Mei Cho
YOU?
Author Swipe
View article: The Atacama Cosmology Telescope: DR6 power spectra, likelihoods and ΛCDM parameters
The Atacama Cosmology Telescope: DR6 power spectra, likelihoods and ΛCDM parameters Open
We present power spectra of the cosmic microwave background (CMB) anisotropy in temperature and polarization, measured from the Data Release 6 maps made from Atacama Cosmology Telescope (ACT) data. These cover 19,000 deg 2 of sky in bands …
View article: The Atacama Cosmology Telescope: DR6 Maps
The Atacama Cosmology Telescope: DR6 Maps Open
We present Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) maps of the Cosmic Microwave Background temperature and polarization anisotropy at arcminute resolution over three frequency bands centered on 98, 150 and 220 GHz. The maps …
View article: The Atacama Cosmology Telescope: DR6 Constraints on Extended Cosmological Models
The Atacama Cosmology Telescope: DR6 Constraints on Extended Cosmological Models Open
We use new cosmic microwave background (CMB) primary temperature and polarization anisotropy measurements from the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) to test foundational assumptions of the standard cosmological model a…
View article: The Atacama Cosmology Telescope: DR6 Power Spectra, Likelihoods and $Λ$CDM Parameters
The Atacama Cosmology Telescope: DR6 Power Spectra, Likelihoods and $Λ$CDM Parameters Open
We present power spectra of the cosmic microwave background (CMB) anisotropy in temperature and polarization, measured from the Data Release 6 maps made from Atacama Cosmology Telescope (ACT) data. These cover 19,000 deg$^2$ of sky in band…
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: Atacama Cosmology Telescope: High-resolution component-separated maps across one third of the sky
Atacama Cosmology Telescope: High-resolution component-separated maps across one third of the sky Open
Observations of the millimeter sky contain valuable information on a number of signals, including the blackbody cosmic microwave background (CMB), Galactic emissions, and the Compton-y distortion due to the thermal Sunyaev-Zel’dovich (tSZ)…
View article: The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters
The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters Open
We present cosmological constraints from a gravitational lensing mass map covering 9400 deg 2 reconstructed from measurements of the cosmic microwave background (CMB) made by the Atacama Cosmology Telescope (ACT) from 2017 to 2021. In comb…
View article: Quantum Sensors for High Energy Physics
Quantum Sensors for High Energy Physics Open
Strong motivation for investing in quantum sensing arises from the need to investigate phenomena that are very weakly coupled to the matter and fields well described by the Standard Model. These can be related to the problems of dark matte…
View article: The Atacama Cosmology Telescope: High-resolution component-separated maps across one-third of the sky
The Atacama Cosmology Telescope: High-resolution component-separated maps across one-third of the sky Open
Observations of the millimeter sky contain valuable information on a number of signals, including the blackbody cosmic microwave background (CMB), Galactic emissions, and the Compton-$y$ distortion due to the thermal Sunyaev-Zel'dovich (tS…
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: Soft X-ray spectroscopy with transition-edge sensors at Stanford Synchrotron Radiation Lightsource beamline 10-1
Soft X-ray spectroscopy with transition-edge sensors at Stanford Synchrotron Radiation Lightsource beamline 10-1 Open
We present results obtained with a new soft X-ray spectrometer based on transition-edge sensors (TESs) composed of Mo/Cu bilayers coupled to bismuth absorbers. This spectrometer simultaneously provides excellent energy resolution, high det…
View article: Two-Level Switches for Advanced Time-Division Multiplexing
Two-Level Switches for Advanced Time-Division Multiplexing Open
Superconducting quantum interference device (SQUID)-based time-division multiplexing (TDM) is a mature and widely implemented technology used to read out transition-edge sensor arrays. As the number of pixels in modern arrays continues to …
View article: Design Overview of the DM Radio Pathfinder Experiment
Design Overview of the DM Radio Pathfinder Experiment Open
We introduce the DM Radio, a dual search for axion and hidden photon dark matter using a tunable superconducting lumped-element resonator. We discuss the prototype DM Radio Pathfinder experiment, which will probe hidden photons in the 500 …
View article: Large arrays of dual-polarized multichroic TES detectors for CMB measurements with the SPT-3G receiver
Large arrays of dual-polarized multichroic TES detectors for CMB measurements with the SPT-3G receiver Open
Detectors for cosmic microwave background (CMB) experiments are now essentially background limited, so a straightforward alternative to improve sensitivity is to increase the number of detectors. Large arrays of multichroic pixels constitu…
View article: Optical modeling and polarization calibration for CMB measurements with ACTPol and Advanced ACTPol
Optical modeling and polarization calibration for CMB measurements with ACTPol and Advanced ACTPol Open
The Atacama Cosmology Telescope Polarimeter (ACTPol) is a polarization sensitive upgrade to the Atacama Cosmology Telescope. Located at an elevation of 5190 m, ACTPol measures the Cosmic Microwave Background (CMB) temperature and polarizat…