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11 July 2018 Design and lab-test result of APol, a polarimeter for the Atacama sub-millimeter telescope experiment
Y. Zhang, H-B. Li
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Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII; 1070297 (2018) https://doi.org/10.1117/12.2312547
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States
Abstract
The Atacama Submillimeter Telescope Experiment (ASTE) 10m aperture telescope has a multicolor camera based on a spiderweb absorber Transition Edge Sensor (TES) bolometer array. We developed a fore-optics module – ‘APol’, to convert 256 pixels of the TES camera into a sensitive imaging polarimeter at 350 ± 25 GHz. We used the simple half-wave plate - wire grid - camera design in APol, and it can cover 7’.5 FOV of ASTE. Here we describe the detailed optical design of APol and present result of the preliminary test carried out with the same optical system and camera at National Astronomical Observatory of Japan (NAOJ) laboratory.
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Y. Zhang and H-B. Li "Design and lab-test result of APol, a polarimeter for the Atacama sub-millimeter telescope experiment", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 1070297 (11 July 2018); https://doi.org/10.1117/12.2312547
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KEYWORDS
Polarization
Polarimetry
Telescopes
Optical instrument design
Optical design
Sapphire
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