Bradley Johnson

Bradley Johnson is an Associate Professor in the Department of Astronomy at the University of Virginia. His research focuses on the development of advanced instrumentation for cosmic microwave background (CMB) observations, including superconducting detectors, cryogenic systems, and polarization-sensitive technologies.

• Affiliation: University of Virginia, College of Arts and Sciences
• Contact: bj6fu@virginia.edu

Research Interests:
Specializing in millimeter-wave astronomy and astrophysical instrumentation, Johnson contributes to experiments like the Simons Observatory, targeting CMB polarization, foreground removal, and cosmological parameter constraints. His work spans detector design, optical testing, and cryogenic engineering.

Recent Work Trends:
2025 publications highlight advancements in large aperture telescope receivers, superconducting magnetic bearings for polarization modulation, and optical imaging systems using kinetic inductance detectors. Earlier articles focus on SQUID multiplexers, achromatic half-wave plates, and cryogenic test facilities for CMB experiments.

Technical Contributions:
Johnson has developed scalable kilo-pixel detector modules, magnetic shielding techniques, and precision calibration systems for millimeter-wave polarimeters. His collaborations include projects like PICO (Probe of Inflation and Cosmic Origins) and CMB-S4, aiming to constrain primordial gravitational waves.