AO4ELT5 Proceedings

Use of SLODAR for daytime turbulence profiling

Carlisle, Elizabeth (National Solar Observatory), Schmidt, Dirk (National Solar Observatory), Marino, Jose (National Solar Observatory), Guesalaga, Andrés (Pontificia Universidad Católica de Chile)

We adapt the Slope Detection and Ranging (SLODAR) technique, a method for characterizing the vertical turbulence profile of the atmosphere, for use in solar telescopes with a Shack-Hartmann wavefront sensor. Our algorithm is based on the SLODAR system modified to use multiple wavefront sensing directions for the Gemini South Multi-Conjugate Adaptive Optics System. We present results from a study to determine its accuracy when extended objects (solar granulation) are used for wavefront sensing. We use computer simulations to explore the performance and reliability of the algorithm. One major focus is to understand its reduced sensitivity with height, which is particularly important in the solar case. The aim of this study is to validate the SLODAR method for solar applications, improve its performance, and determine the best design to deploy to Clear, the MCAO system at the Big Bear Solar Observatory (BBSO); and to the Daniel K. Inouye Solar Telescope (DKIST).

DOI: 10.26698/AO4ELT5.0103- Proceeding PDF

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