Large-scale measurements of the cosmic microwave background
Abstract/Contents
- Abstract
- The cosmic microwave background (CMB), the afterglow of the Big Bang, is a cornerstone of modern cosmology. Measuring its features with ever-increasing detail has been key to building and validating our current standard cosmological model, thus motivating further attempts to study the CMB with ever greater precision. First, we present the development of the microwave SQUID multiplexer. We show the design and validation of custom warm readout electronics and discuss studies of the fundamental properties of the device and readout combined system. We discuss the first on-sky CMB demonstration of umux and production-scale development at 910x multiplexing factor for upcoming CMB observatories. Together these efforts increase the achieved multiplexing factor for deployment-grade CMB detector systems by over an order of magnitude. Second, we present measurements of CMB E-mode polarization at large angular scales with the BICEP/Keck program. We show the design and execution of new extended-area observations with BICEP3 to map large-scale E-modes across almost 20\% of the sky. We present the updated analysis pipeline for mapmaking, curved sky power spectrum estimation, and likelihood framework. Preliminary analysis shows sensitivity to new cosmology comparable to the best satellite observation-based constraints, demonstrating the potential of future ground-based surveys. Finally, we live in privileged times in cosmology, with access to unprecedented instruments and computing power. This work cannot be done alone: large collaborations of hundreds of scientists are responsible for producing much of the stunning success of modern cosmology. We present thoughts on structural policies to ensure the diversity, equity, and inclusivity of these large-scale collaborations moving forward.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2023; ©2023 |
| Publication date | 2023; 2023 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Yu, Cyndia Blaire |
|---|---|
| Degree supervisor | Ahmed, Zeeshan |
| Degree supervisor | Kuo, Chao-Lin, (Physics professor) |
| Thesis advisor | Ahmed, Zeeshan |
| Thesis advisor | Kuo, Chao-Lin, (Physics professor) |
| Thesis advisor | Akerib, Daniel S |
| Thesis advisor | Church, Sarah Elizabeth |
| Thesis advisor | Irwin, Kent |
| Degree committee member | Akerib, Daniel S |
| Degree committee member | Church, Sarah Elizabeth |
| Degree committee member | Irwin, Kent |
| Associated with | Stanford University, School of Humanities and Sciences |
| Associated with | Stanford University, Department of Physics |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Cyndia Yu. |
|---|---|
| Note | Submitted to the Department of Physics. |
| Thesis | Thesis Ph.D. Stanford University 2023. |
| Location | https://purl.stanford.edu/zz471qw8423 |
Access conditions
- Copyright
- © 2023 by Cyndia Blaire Yu
- License
- This work is licensed under a Creative Commons Attribution Non Commercial Share Alike 3.0 Unported license (CC BY-NC-SA).
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