Detectors for measuring B-modes in the Cosmic Microwave Background

Osherson, Benjamin Paul

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https://hdl.handle.net/2142/115361 Copy

Description

Title

Detectors for measuring B-modes in the Cosmic Microwave Background

Author(s)

Osherson, Benjamin Paul

Issue Date

2022-04-08

Director of Research (if dissertation) or Advisor (if thesis)

Filippini, Jeffrey

Doctoral Committee Chair(s)

Holder, Gilbert

Committee Member(s)

• van Harlingen, Dale
• Giannetta, Russell

Department of Study

Physics

Discipline

Physics

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(s)

detector detectors TES TESs B-modes CMB

Abstract

Future mm-wave and sub-mm space missions will employ large arrays of multiplexed Transition Edge Sensor (TES) bolometers to search for $B$-modes in the Cosmic Microwave Background (CMB) --- the signatures of primordial gravitational waves. These TES bolometers were deployed in \spiderI's stratospheric flight, and will be deployed in \cmbsIV across many ground based telescopes. Both of these collaborations are designed to observe $B$-modes. In this thesis I describe three projects: The first is computing a model for \spiderI noise with a focus on identifying the source of excess noise: either the TESs or the readout components. The second project is using design constraints for \cmbsIV telescopes to bound bolometer parameters for foundries to target. These constraints are to ensure the detectors are stable, overdamped, and have sufficiently fast time constants for each telescope's scan strategy. The third project exposes \spiderI TES detectors to radiation in a lab environment to address questions about the risks of deploying these modern bolometer arrays in future satellite missions. From this experiment, we learn the approximate distances from bolometers that a cosmic ray must hit for it to cause a glitch in data.

Graduation Semester

2022-05

Type of Resource

Thesis

Copyright and License Information

Copyright 2022 Benjamin Osherson

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