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The Optical Design Concept for the Atacama Large Aperture Submillimeter Telescope (AtLAST)

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arxiv 2406.11502 v1 pith:4BBKM5JV submitted 2024-06-17 astro-ph.IM

classification astro-ph.IM
keywords atlastlargedesignopticalapertureconceptfieldview
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abstract

The Atacama Large Aperture Submillimeter Telescope (AtLAST) aims to be the premier next generation large diameter (50-meter) single dish observatory capable of observations across the millimeter/sub-millimeter spectrum, from 30 to 950~GHz. The large primary mirror diameter, the 2-degree field of view and its large 4.7-meter focal surface give AtLAST a high throughput (aperture size times field of view) and grasp (throughput times spectral reach), with the ability to illuminate $>\mathcal{O}(10^7)$ detectors. The optical design concept for AtLAST consists of a numerically optimized two-mirror Ritchey-Chr\'etien system with an additional flat folding mirror, which enables a quick selection among its planned six instrument positions. We present the optical design concept and discuss the expected optical performance of AtLAST. We then present design concepts that can be implemented in the receiver and instrument optics to correct for astigmatism and mitigate the high degree of curvature of the focal surface in order to recover significant fractions of the geometric field of view at sub-millimeter wavelengths.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Meta-heuristic design of a light-weight homologous backup structure of the primary reflector for the Large Submillimeter Telescope

    astro-ph.IM 2025-06 conditional novelty 5.0 of 10

    A genetic-algorithm optimization of a 50-meter telescope backup structure yields a design with about 5 µm RMS surface error and reduced mass when the central hub is excluded from the accuracy metric.

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