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Proceedings Paper

Laser guide star upgrade of Altair at Gemini North
Author(s): Maxime Boccas; Francois Rigaut; Matthieu Bec; Benjamin Irarrazaval; Eric James; Angelic Ebbers; Celine d'Orgeville; Kenny Grace; Gustavo Arriagada; Stan Karewicz; Mike Sheehan; John White; Simon Chan
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Paper Abstract

Altair is the general-purpose Adaptive Optics bench installed on Gemini North that has operated successfully with Natural Guide Star (NGS) since 2003. The original design and fabrication included an additional WaveFront Sensor (WFS) to enable operation with Laser Guide Star (LGS). Altair has been recently upgraded and functional commissioning was performed between June and November 2005. The insertion of a dichroic beamsplitter in the NGS path allows to reflect the 589nm light to the LGS wavefront sensor and transmit the visible light of the NGS (or Tip-Tilt Guide star -TTGS-) to the tip-tilt-focus sensors. We will review the various modifications made for this dual operation, both in hardware and software, and describe the steps and results of the integration and testing phase on the sky.

Paper Details

Date Published: 27 June 2006
PDF: 9 pages
Proc. SPIE 6272, Advances in Adaptive Optics II, 62723L (27 June 2006); doi: 10.1117/12.670842
Show Author Affiliations
Maxime Boccas, Gemini Observatory (United States)
Francois Rigaut, Gemini Observatory (United States)
Matthieu Bec, Gemini Observatory (United States)
Benjamin Irarrazaval, Gemini Observatory (United States)
Eric James, Gemini Observatory (United States)
Angelic Ebbers, Gemini Observatory (United States)
Celine d'Orgeville, Gemini Observatory (United States)
Kenny Grace, Gemini Observatory (United States)
Gustavo Arriagada, Gemini Observatory (United States)
Stan Karewicz, Gemini Observatory (United States)
Mike Sheehan, Gemini Observatory (United States)
John White, Gemini Observatory (United States)
Simon Chan, Gemini Observatory (United States)


Published in SPIE Proceedings Vol. 6272:
Advances in Adaptive Optics II
Brent L. Ellerbroek; Domenico Bonaccini Calia, Editor(s)

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