@inproceedings{21e51e7cd5494331ab8bca0defea1868,
title = "Status of the 6.5 m MMT telescope Laser Adaptive Optics system",
abstract = "The Laser Adaptive Optics system of the 6.5 m MMT telescope has now been commissioned with Ground Layer Adaptive Optics operations as a tool for astronomical science. In this mode the wavefronts sampled by each of five laser beacons are averaged, leading to an estimate of the aberration in the ground layer. The ground layer is then compensated by the deformable secondary mirror at 400 Hz. Image quality of 0.2-0.3 arc sec is delivered in the near infrared bands from 1.2-2.5 um over a field of view of 2 arc minutes. Tomographic wavefront sensing tests in May 2010 produced open loop data necessary to streamline the software to generate a Laser Tomography Adaptive Optics (LTAO) reconstructor. In addition, we present the work being done to achieve optimal control PID wavefront control and thus increase the disturbance rejection frequency response for the system. Finally, we briefly describe plans to mount the ARIES near infrared imager and echelle spectrograph, which will support the 2 arc min ground-layer corrected field and will exploit the diffraction limit anticipated with LTAO.",
keywords = "Adaptive optics, Ground layer adaptive optics, Laser tomography, Optimal control, Rayleigh lasers",
author = "Bendek, {Eduardo A.} and Michael Hart and Powell, {Keith B.} and Milton, {Norman M.} and Vidhya Vaitheeswaran and Don McCarthy and Craig Kulesa and Shawn Callahan and {Mark Ammons}, S. and Rissmann, {Aurea Garcia}",
year = "2010",
doi = "10.1117/12.857663",
language = "English (US)",
isbn = "9780819482266",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
number = "PART 1",
booktitle = "Adaptive Optics Systems II",
edition = "PART 1",
note = "Adaptive Optics Systems II ; Conference date: 27-06-2010 Through 02-07-2010",
}