Development and status of MAPS, the MMT AO exoPlanet characterization system
| Autor: | Lori Harrison, Terry J. Jones, Philip Hinz, Andrew Gardner, Tim Hardy, E. Downey, Manny Montoya, Emily Mailhot, C. Fellows, Amali Vaz, Narsireddy Anugu, John Ford, Frank Gacon, Shaojie Chen, J. Patience, Buell T. Jannuzi, Jared Carlson, Siqi Liu, Katie M. Morzinski, Suresh Sivanandam, Grant West, Adam Butko, Olivier Durney, Masen Lamb |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Wavefront
Physics Digital electronics instrumentation stars spectroscopy polarization business.industry near infrared spectroscopy electronics wavefront sensors mirrors actuators Exoplanet adaptive optics Optics Upgrade exoplanets Planet cameras infrared Electronics Guide star business Adaptive optics |
| Popis: | We are upgrading and refurbishing the first-generation adaptive-secondary mirror (ASM)-based AO system on the 6.5-m MMT in Arizona, in an NSF MSIP-funded program that will create a unique facility specialized for exoplanet characterization. This update includes a third-generation ASM with embedded electronics for low power consumption, two pyramid wavefront sensors (optical and near-IR), and an upgraded ARIES science camera for high-resolution spectroscopy (HRS) from 1-5 μm and MMT-POL science camera for sensitive polarization mapping. Digital electronics have been incorporated into each of the 336 actuators, simplifying hub-level electronics and reducing the total power to 300 W, down from 1800 W in the legacy system — reducing cooling requirements from active coolant to passive ambient cooling. An improved internal control law allows for electronic damping and a faster response. The dual pyramid wavefront sensors allow for a choice between optical or IR wavefront sensing depending on guide star magnitude, color, and extinction. The HRS upgrade to ARIES enables crosscorrelation of molecular templates to extract atmospheric parameters of exoplanets. The combination of these upgrades creates a workhorse instrument for exoplanet characterization via AO and HRS to separate planets from their host stars, with broad wavelength coverage and polarization to probe a range of molecular species in exoplanet atmospheres. SPIE Astronomical Telescopes + Instrumentation, December 14-18, 2020, Online Only, United States Series: Proceedings of SPIE |
| Databáze: | OpenAIRE |
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