Publications by authors named "N Galitzki"
We present the requirements, design, and evaluation of the cryogenic continuously rotating half-wave plate (CHWP) for the Simons Observatory (SO). SO is a cosmic microwave background polarization experiment at Parque Astronómico de Atacama in northern Chile that covers a wide range of angular scales using both small (⌀0.42 m) and large (⌀6 m) aperture telescopes.
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- The new calibration system for cosmic microwave background (CMB) polarization uses a sparse wire grid to reflect polarized light, improving accuracy in measurements.
- A remote-controlled feature allows for regular calibration, which was previously not possible, utilizing electric actuators to adjust the wire grid's position.
- The system includes a motor for rotation and sensors to ensure precise monitoring, resulting in minimal systematic errors and planned installation in telescopes at Simons Observatory.
We present the design and measured performance of a new carbon fiber strut design that is used in a cryogenically cooled truss for the Simons Observatory small aperture telescope. The truss consists of two aluminum 6061 rings separated by 24 struts. Each strut consists of a central carbon fiber tube fitted with two aluminum end caps.
View Article and Find Full Text PDFWe 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. The primary goal of the simulations was to evaluate the final design of the reflectors and the cold optics that are now being built.
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