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Design and Performance of the PALM-3000 3.5 kHz Upgrade

Show simple item record Meeker, Seth R. Truonga, Tuan N. Roberts, Jennifer E. Shelton, J. Chris Fregoso, S. Felipe Burruss, Rick S. Dekany, Richard G. Wallace, J. Kent Baker, John W. Heffner, Carolyn M. Mawet, Dimitri Rykoski, Kevin M. Tesch, Jonathan A. Vasisht, Gautam 2022-01-12T22:44:33Z 2022-01-12T22:44:33Z 2020-12-14
dc.identifier.citation SPIE Astronomical Telescopes + Instrumentation 2020, San Diego, California, December 14-18, 2020
dc.identifier.clearanceno CL#20-6109
dc.description.abstract PALM-3000 (P3K), the second-generation adaptive optics (AO) instrument for the 5.1 meter Hale telescope atPalomar Observatory, was released as a facility class instrument in October 2011 and has since been used on-skyfor over 600 nights as a workhorse science instrument and testbed for coronagraph and detector development.In late 2019 P3K underwent a significant upgrade to its wavefront sensor (WFS) arm and real-time control(RTC) system to reinforce its position as a state-of-the-art AO facility and extend its faint-end capability forhigh-resolution imaging and precision radial velocity follow-up of Kepler and TESS targets. The main featuresof this upgrade include an EM-CCD WFS camera capable of 3.5 kHz framerates, and an advanced Digital SignalProcessor (DSP) based RTC system to replace the aging GPU based system. Similar to the pre-upgrade system,the Shack-Hartmann wavefront sensor supports multiple pupil sampling modes using a motorized lenslet stage.The default sampling mode with 64×64 subapertures has been re-commissioned on-sky in late 2019, witha successful return to science observations in November 2019. In 64×mode the upgraded system is alreadyachieving K-band Strehl ratios up to 85% on-sky and can lock on natural guide stars as faint as mV=16. A16×16 subaperture mode is scheduled for on-sky commissioning in Fall 2020 and will extend the system’s faintlimit even further. Here we present the design and on-sky re-commissioning results of the upgraded system,dubbed P3K-II.
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2020
dc.title Design and Performance of the PALM-3000 3.5 kHz Upgrade
dc.type Preprint

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