Abstract Details
| Name: Raja Bayanna Affiliation: PRL/Udaipur Solar Observatory Conference ID: ASI2017_591 Title : A Low-order Adaptive Optics System for Multi-Application Solar Telescope Authors and Co-Authors : Shibu K. Mathew, Rohan E Louis, R. Sridharan, Brajesh Kumar, B. Ramyareddy, P.Venkatakrishnan Udaipur Solar Observatory, Indian Institute of Astrophysics, Leibniz-Institut f\"ur Astrophysik Potsdam (AIP) Abstract Type : Poster Abstract Category : Instrumentation and Techniques Abstract : Multi-Application Solar Telescope (MAST) is a 50 cm off-axis Gregorian telescope installed at the island site of Udaipur Solar Observatory (USO), India. Mean value of the Fried’s parameter that characterises the atmospheric turbulence at this site is 4.5 cm. An Adaptive Optics (AO) system has been developed at USO for compensating image degradation, in order to achieve the telescope’s diffraction limit. The main components of the system are (a) a stand-alone image stabilization system that compensates the global tilt of the distorted wavefront and (b) a Shack-Hartmann wavefront sensor along with a 37-Channel deformable mirror for sensing and correction of local tilts of the distorted wavefront. In this presentation, the AO system and the calibration of its various components will be described. We also present preliminary observations obtained with the MAST AO system. |