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Proceedings Paper

Gemini South multi-conjugate adaptive optics (GeMS) laser guide star facility on-sky performance results
Author(s): Céline d'Orgeville; Sarah Diggs; Vincent Fesquet; Benoit Neichel; William Rambold; François Rigaut; Andrew Serio; Claudio Araya; Gustavo Arriagada; Rodrigo Balladares; Matthieu Bec; Maxime Boccas; Camila Duran; Angelic Ebbers; Ariel Lopez; Claudio Marchant; Eduardo Marin; Vanessa Montes; Cristian Moreno; Eric Petit Vega; Carlos Segura; Gelys Trancho; Chad Trujillo; Cristian Urrutia; Patricio Veliz; Tomislav Vucina
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Paper Abstract

With two to three deformable mirrors, three Natural Guide Stars (NGS) and five sodium Laser Guide Stars (LGS), the Gemini Multi-Conjugate Adaptive Optics System (Gemini MCAO a.k.a. GeMS) will be the first facility-class MCAO capability to be offered for regular science observations starting in 2013A. The engineering and science commissioning phase of the project was kicked off in January 2011 when the Gemini South Laser Guide Star Facility (GS LGSF) propagated its 50W laser above the summit of Cerro Pachón, Chile. GeMS commissioning has proceeded throughout 2011 and the first half of 2012 at a pace of one 6- to 10-night run per month with a 5-month pause during the 2011 Chilean winter. This paper focuses on the LGSF-side of the project and provides an overview of the LGSF system and subsystems, their top-level specifications, design, integration with the telescope, and performance throughout commissioning and beyond. Subsystems of the GS LGSF include: (i) a diode-pumped solid-state 1.06+1.32 micron sum-frequency laser capable of producing over 50W of output power at the sodium wavelength (589nm); (ii) Beam Transfer Optics (BTO) that transport the 50W beam up the telescope, split the beam five-ways and configure the five 10W beams for projection by the Laser Launch Telescope (LLT) located behind the Gemini South 8m telescope secondary mirror; and (iii) a variety of safety systems to ensure safe laser operations for observatory personnel and equipment, neighbor observatories, as well as passing aircrafts and satellites.

Paper Details

Date Published: 13 September 2012
PDF: 21 pages
Proc. SPIE 8447, Adaptive Optics Systems III, 84471Q (13 September 2012); doi: 10.1117/12.925813
Show Author Affiliations
Céline d'Orgeville, Research School of Astronomy and Astrophysics, The Australian National Univ. (Australia)
Gemini Observatory (Chile)
Sarah Diggs, Gemini Observatory (Chile)
Vincent Fesquet, Gemini Observatory (Chile)
Benoit Neichel, Gemini Observatory (Chile)
William Rambold, Gemini Observatory (Chile)
François Rigaut, Research School of Astronomy and Astrophysics, The Australian National Univ. (Australia)
Gemini Observatory (Chile)
Andrew Serio, Gemini Observatory (Chile)
Claudio Araya, Gemini Observatory (Chile)
Gustavo Arriagada, Gemini Observatory (Chile)
Rodrigo Balladares, Gemini Observatory (Chile)
Matthieu Bec, Giant Magellan Telescope Organization Corp. (United States)
Maxime Boccas, Gemini Observatory (Chile)
Camila Duran, Gemini Observatory (Chile)
Angelic Ebbers, Gemini Observatory (Chile)
Ariel Lopez, Gemini Observatory (Chile)
Claudio Marchant, Gemini Observatory (Chile)
Eduardo Marin, Gemini Observatory (Chile)
Vanessa Montes, Gemini Observatory (Chile)
Cristian Moreno, Gemini Observatory (Chile)
Eric Petit Vega, Gemini Observatory (Chile)
Carlos Segura, Gemini Observatory (Chile)
Gelys Trancho, Giant Magellan Telescope Organization Corp. (United States)
Chad Trujillo, Gemini Observatory (Chile)
Cristian Urrutia, Gemini Observatory (Chile)
Patricio Veliz, Gemini Observatory (Chile)
Tomislav Vucina, Gemini Observatory (Chile)

Published in SPIE Proceedings Vol. 8447:
Adaptive Optics Systems III
Brent L. Ellerbroek; Enrico Marchetti; Jean-Pierre Véran, Editor(s)

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