Abstract

Integral-field spectropolarimetry enables simultaneous spatial, spectral, and polarization measurements. Observations of polarized light allow researchers to map magnetic fields, distinguish scattering from intrinsic emission, and characterize the geometry of sources illuminating the large-scale dust distribution within and around galaxies. In tandem with spectral information, polarized emission can be used to detail the kinematics of dust expelled from galaxies and to probe the underlying spectrum of scattered light—measurements that help constrain key open questions such as the missing baryon problem and the role of feedback in galaxy evolution. However, spectropolarimetry is a rare capability among ground-based observatories. This thesis showcases a prototype design of a compact, off-the-shelf optical polarization module intended for pairing with lenslet-based integral-field spectrographs like the Circumgalactic Hα Spectrograph (CHαS). This thesis describes the opto-mechanical layout, data collection scheme, and strategies used to measure and calibrate instrumental polarization. The module sits in the converging beam of the optical train, enabling polarization measurements without requiring major modifications to the optical path and allowing for compatibility with existing integral-field spectrographs. This thesis will present the design, implementation, and laboratory characterization of this prototype, highlighting its role in enabling future integral field spectropolarimetric measurements across a broad range of astrophysical targets.

Publication Date

7-2026

Document Type

Thesis

Student Type

Graduate

Degree Name

Astrophysical Sciences and Technology (MS)

Department, Program, or Center

Physics and Astronomy, School of

College

College of Science

Advisor

Nicole Melso

Advisor/Committee Member

Andrew Robinson

Advisor/Committee Member

Zoran Ninkov

Campus

RIT – Main Campus

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