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Proceedings Paper

Adaptation of Dunn Solar Telescope for Jovian Doppler spectro imaging
Author(s): Thomas A. Underwood; David Voelz; François-Xavier Schmider; Jason Jackiewicz; Julien Dejonghe; Yves Bresson; Robert Hull; Ivan Goncalves; Patrick Gualme; Frédéric Morand; Olivier Preis
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Paper Abstract

This paper describes instrumentation used to adapt the Dunn Solar Telescope (DST) located on Sacramento Peak in Sunspot, NM for observations using the Doppler Spectro Imager (DSI). The DSI is based on a Mach-Zehnder interferometer and measures the Doppler shift of solar lines allowing for the study of atmospheric dynamics of giant planets and the detection of their acoustic oscillations. The instrumentation is being designed and built through a collaborative effort between a French team from the Observatoire de la Cote d’Azur (OCA) that designed the DSI and a US team at New Mexico State University (NMSU). There are four major components that couple the DSI to the DST: a guider/tracker, fast steering mirror (FSM), pupil stabilizer and transfer optics. The guider/tracker processes digital video to centroid-track the planet and outputs voltages to the DST’s heliostat controls. The FSM removes wavefront tip/tilt components primarily due to turbulence and the pupil stabilizer removes any slow pupil “wander” introduced by the telescope’s heliostat/turret arrangement. The light received at a science port of the DST is sent through the correction and stabilization components and into the DSI. The FSM and transfer optics designs are being provided by the OCA team and serve much the same functions as they do for other telescopes at which DSI observations have been conducted. The pupil stabilization and guider are new and are required to address characteristics of the DST.

Paper Details

Date Published: 5 September 2017
PDF: 10 pages
Proc. SPIE 10401, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems, 104010Y (5 September 2017); doi: 10.1117/12.2275909
Show Author Affiliations
Thomas A. Underwood, New Mexico State Univ. (United States)
David Voelz, New Mexico State Univ. (United States)
François-Xavier Schmider, Univ. Côte d'Azur (France)
Jason Jackiewicz, New Mexico State Univ. (United States)
Julien Dejonghe, Univ. Côte d'Azur (France)
Yves Bresson, Univ. Côte d'Azur (France)
Robert Hull, New Mexico State Univ. (United States)
Ivan Goncalves, Univ. Côte d'Azur (France)
Patrick Gualme, New Mexico State Univ. (United States)
Frédéric Morand, Univ. Côte d'Azur (France)
Olivier Preis, Univ. Côte d'Azur (France)

Published in SPIE Proceedings Vol. 10401:
Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems
Tony B. Hull; Dae Wook Kim; Pascal Hallibert, Editor(s)

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