Research higlights with significant contributions from our group here at Stockholm University. For a full list of publications, see list of publications.
We study systematic effects from half-wave plates (HWPs) for CMB experiments using full-sky time-domain beam convolution simulations. We investigate how different HWP configurations optimized for dichroic detectors centred at 95 and 150 GHz impact the reconstruction of primordial B-mode polarization.
Adriaan J. Duivenvoorden, Alexandre Adler, Matteo Billi, Nadia Dachlythra, and Jon E. Gudmundsson
Submitted to MNRAS
Accurate optical modeling is important for the design and characterisation of current and next-generation experiments studying the Cosmic Microwave Background (CMB). We simulate the optical response of a ground-based two-lens refractor design shielded by a ground screen with time-reversed simulations.
Alexandre Adler and Jon E. Gudmundsson
SPIE Proceedings Volume 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X
We present geometrical and physical optics simulation results for the Simons Observatory Large Aperture Telescope. This work was developed as part of the general design process for the telescope; allowing us to evaluate the impact of various design choices on performance metrics and potential systematic effects.
Jon E. Gudmundsson et al.
Applied Optics, in press
We present a compact two-lens HDPE f/1.6 refractor design that is capable of supporting a 28-deg diffraction-limited field of view at 1-mm wavelengths and contrast it to a similar two-lens refractor using silicon lenses. We compare the optical properties of these two systems as predicted by both geometrical and physical optics.
Jon E. Gudmundsson
Applied Optics (link to article )
We introduce a publicly available full-sky beam convolution code library intended to inform the design of future cosmic microwave background (CMB) instruments and help current experiments probe potential systematic effects.
Adriaan J. Duivenvoorden, Jon E. Gudmundsson, Alexandra S. Rahlin
MNRAS (link to article )