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1. High precision 5 MeV Mott polarimeter

   https://doi.org/10.1103/PhysRevC.102.015501  

   Grames, J. M.; Sinclair, C. K.; Poelker, M.; Roca-Maza, X.; Stutzman, M. L.; Suleiman, R.; Mamun, Md. A.; McHugh, M.; Moser, D.; Hansknecht, J.; et al (July 2020, Physical Review C)
2. The Precursor Small Aperture Telescope (PreSAT) CMB polarimeter

   Petroff, Matthew A; Ahmed, Zeeshan; Bock, James J; Dierickx, Marion; Fatigoni, Sofia; Goldfinger, David C; Grimes, Paul K; Henderson, Shawn W; Karkare, Kirit S; Kovac, John M; et al (June 2024, Proceedings of SPIE)

   The search for the polarized imprint of primordial gravitational waves in the cosmic microwave background (CMB) as direct evidence of cosmic inflation requires exquisite sensitivity and control over systematics. The next-generation CMB-S4 project intends to improve upon current-generation experiments by deploying a significantly greater number of highly-sensitive detectors, combined with refined instrument components based on designs from field-proven instruments. The Precursor Small Aperture Telescope (PreSAT) is envisioned as an early step to this next generation, which will test prototype CMB-S4 components and technologies within an existing Bicep Array receiver, with the aim of enabling full-stack laboratory testing and early risk retirement, along with direct correlation of laboratory component-level performance measurements with deployed system performance. The instrument will utilize new 95/155 GHz dichroic dual-linear-polarization prototype detectors developed for CMB-S4, cooled to 100mK via the installation of an adiabatic demagnetization refrigerator, along with a prototype readout chain and prototype optics manufactured with wide-band anti-reflection coatings. The experience gained by integrating, deploying, and calibrating PreSAT will also help inform planning for CMB-S4 small aperture telescope commissioning, calibration, and operations well in advance of the fabrication of CMB-S4 production hardware. 

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3. The Precursor Small Aperture Telescope (PreSAT) CMB polarimeter

   https://doi.org/10.1117/12.3018421  

   Petroff, Matthew; Ahmed, Zeeshan; Bock, James J; Dierickx, Marion; Fatigoni, Sofia; Goldfinger, David C; Grimes, Paul K; Henderson, Shawn W; Karkare, Kirit S; Kovac, John M; et al (August 2024, SPIE)

   Zmuidzinas, Jonas; Gao, Jian-Rong (Ed.)
4. Polarization calibration of the BICEP3 CMB polarimeter at the South Pole

   https://doi.org/10.1117/12.2562905  

   Cornelison, James; Ade, P. A.; Ahmed, Zeeshan; Amiri, Mandana; Barkats, Denis; Basu Thakur, Ritoban; Bischoff, Colin; Bock, James; Boenish, Hans; Bullock, Eric; et al (December 2020, SPIE 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X)

   Zmuidzinas, Jonas; Gao, Jian-Rong (Ed.)
5. Division of focal plane red–green–blue full-Stokes imaging polarimeter

   https://doi.org/10.1364/AO.391027  

   Tu, Xingzhou; McEldowney, Scott; Zou, Yang; Smith, Matthew; Guido, Christopher; Brock, Neal; Miller, Sawyer; Jiang, Linan; Pau, Stanley (May 2020, Applied Optics)

   We calibrate and test a division-of-focal-plane red–green–blue (RGB) full-Stokes imaging polarimeter in a variety of indoor and outdoor environments. The polarimeter, acting as a polarization camera, utilizes a low dispersion microretarder array on top of a sensor with Bayer filters and wire-grid linear polarizers. We also present the design and fabrication of the microretarder array and the assembly of the camera and validate the performance of the camera by taking multiple RGB full-Stokes images and videos. Our camera has a small form factor due to its single-sensor design and the unique capability to measure the intensity, color, and polarization of an optical field in a single shot. 

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