Polarization modeling and predictions for Daniel K. Inouye Solar Telescope, part 7: preliminary NCSP system calibration and model fitting
| Autor: | Thomas A. Schad, Amanda J. White, Stacey R. Sueoka, Arthur D. Eigenbrot, David M. Harrington |
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| Rok vydání: | 2021 |
| Předmět: |
01 natural sciences
law.invention 010309 optics Telescope Optics law 0103 physical sciences Calibration Astrophysics::Solar and Stellar Astrophysics Mueller calculus 010303 astronomy & astrophysics Instrumentation Physics Solar observatory business.industry Mechanical Engineering Daniel K. Inouye Solar Telescope Astrophysics::Instrumentation and Methods for Astrophysics Astronomy and Astrophysics Polarizer Electronic Optical and Magnetic Materials Metrology Solar telescope Space and Planetary Science Control and Systems Engineering Astrophysics::Earth and Planetary Astrophysics business |
| Zdroj: | Journal of Astronomical Telescopes, Instruments, and Systems. 7 |
| ISSN: | 2329-4124 |
| DOI: | 10.1117/1.jatis.7.1.018004 |
| Popis: | Daniel K. Inouye Solar Telescope (DKIST) is designed to deliver accurate spectropolarimetric solar data across a wide wavelength range, covering a large field of view simultaneously using multiple facility instruments for solar disk, limb, and coronal observations. We show successful design and implementation of National Solar Observatory Coude Laboratory Spectropolarimeter, a custom metrology tool for efficient continuous broadband polarization calibration of the telescope mirrors through a coude laboratory focus. We compare multiple fitting techniques for the 10 to >140 variable DKIST system polarization models. We compare results with the first DKIST solar calibration observations and find small thermally forced retardance changes of ±0.2 deg and ±0.5 deg for two separate SiO2 retarders. Modulation matrices derived are stable to |
| Databáze: | OpenAIRE |
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