Source Themes

In this work, we describe the performance of the SPIDER 280 GHz receivers during a balloon-borne flight from Antarctica in 2022-23.

We have measured the Reflectance of five absorbers commonly used in experiments studying the cosmic microwave background.

This work presents studies of the mechanical and thermal performance of CryoSim, a model of a generic cylindrical 4-K cryostat cooled with a commercial pulse tube cryocooler that can be used to characterise optical components and full reimaging optical systems.

We describe the development of a measurement bench for millimeter-wave phase-sensitive beam mapping employing a 6-axis robot with the goal of characterizing optical components for CMB experiments.

We use time-domain simulations of Jupiter observations to test and develop a beam reconstruction pipeline for the Simons Observatory Small Aperture Telescopes.

We study how systematic effects from half-wave plates (HWPs) impact our ability to probe parity-violating physics such as cosmic birefringence (CB).

We summarise the recent progress of the Axion Longitudinal Plasma HAloscope (ALPHA) Consortium, a new experimental collaboration to build a plasma haloscope to search for axions and dark photons.

We simulate the optical response of a ground-based two-lens refractor design shielded by a ground screen with time-reversed simulations.

We study systematic effects from half-wave plates (HWPs) for cosmic microwave background (CMB) experiments using full-sky time-domain beam convolution simulations.

We simulate the optical response of a ground-based two-lens refractor design shielded by a ground screen with time-reversed simulations.