The Giant Magellan Telescope adaptive optics program

Antonin H. Bouchez; D. S. Acton; Roberto Biasi; Rodolphe Conan; Brady Espeland; Simone Esposito; Josema Filgueira; Daniele Gallieni; Brian A. McLeod; Enrico Pinna; Fernando Santoro; Gelys Trancho; Marcos A. Van Dam

doi:10.1117/12.2057613

The Giant Magellan Telescope adaptive optics program

Antonin H. Bouchez, D. S. Acton, Roberto Biasi, Rodolphe Conan, Brady Espeland, Simone Esposito, Josema Filgueira, Daniele Gallieni, Brian A. McLeod, Enrico Pinna, Fernando Santoro, Gelys Trancho, Marcos A. Van Dam

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

52 Citations (Scopus)

Abstract

The Giant Magellan Telescope (GMT) adaptive optics (AO) system will be an integral part of the telescope, providing laser guidestar generation, wavefront sensing, and wavefront correction to every instrument currently planned on the 25.4 m diameter GMT. There will be three first generation AO observing modes: Natural Guidestar, Laser Tomography, and Ground Layer AO. All three will use a segmented adaptive secondary mirror to deliver a corrected beam directly to the instruments. The Natural Guidestar mode will provide extreme AO performance, with a total wavefront error less than 185 nm RMS using bright guidestars. The Laser Tomography mode uses 6 lasers and a single off-axis natural guidestar to deliver better than 290 nm RMS wavefront error at the science target, over 50% of the sky at the galactic pole. The Ground Layer mode uses 4 natural guidestars on the periphery of the science field to tomographically reconstruct and correct the ground layer AO turbulence, improving the image quality for wide-field instruments. A phasing system maintains the relative alignment of the primary and secondary segments using edge sensors and continuous feedback from an off-axis guidestar. We describe the AO system preliminary design, predicted performance, and the remaining technical challenges as we move towards the start of construction.

Original language	English
Title of host publication	Adaptive Optics Systems IV
Editors	Jean-Pierre Veran, Enrico Marchetti, Laird M. Close
Publisher	SPIE
ISBN (Electronic)	9780819496164
DOIs	https://doi.org/10.1117/12.2057613
Publication status	Published - 2014
Event	Adaptive Optics Systems IV - Montreal, Canada Duration: 22 Jun 2014 → 27 Jun 2014

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	9148
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Adaptive Optics Systems IV
Country/Territory	Canada
City	Montreal
Period	22/06/14 → 27/06/14

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10.1117/12.2057613

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Bouchez, A. H., Acton, D. S., Biasi, R., Conan, R., Espeland, B., Esposito, S., Filgueira, J., Gallieni, D., McLeod, B. A., Pinna, E., Santoro, F., Trancho, G., & Van Dam, M. A. (2014). The Giant Magellan Telescope adaptive optics program. In J.-P. Veran, E. Marchetti, & L. M. Close (Eds.), Adaptive Optics Systems IV Article 91480W (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9148). SPIE. https://doi.org/10.1117/12.2057613

@inproceedings{337a54a2e24f431ba20054081e608b06,

title = "The Giant Magellan Telescope adaptive optics program",

abstract = "The Giant Magellan Telescope (GMT) adaptive optics (AO) system will be an integral part of the telescope, providing laser guidestar generation, wavefront sensing, and wavefront correction to every instrument currently planned on the 25.4 m diameter GMT. There will be three first generation AO observing modes: Natural Guidestar, Laser Tomography, and Ground Layer AO. All three will use a segmented adaptive secondary mirror to deliver a corrected beam directly to the instruments. The Natural Guidestar mode will provide extreme AO performance, with a total wavefront error less than 185 nm RMS using bright guidestars. The Laser Tomography mode uses 6 lasers and a single off-axis natural guidestar to deliver better than 290 nm RMS wavefront error at the science target, over 50% of the sky at the galactic pole. The Ground Layer mode uses 4 natural guidestars on the periphery of the science field to tomographically reconstruct and correct the ground layer AO turbulence, improving the image quality for wide-field instruments. A phasing system maintains the relative alignment of the primary and secondary segments using edge sensors and continuous feedback from an off-axis guidestar. We describe the AO system preliminary design, predicted performance, and the remaining technical challenges as we move towards the start of construction.",

keywords = "Adaptive Optics, Adaptive Secondary Mirrors, Extremely Large Telescopes, Ground Layer AO",

author = "Bouchez, {Antonin H.} and Acton, {D. S.} and Roberto Biasi and Rodolphe Conan and Brady Espeland and Simone Esposito and Josema Filgueira and Daniele Gallieni and McLeod, {Brian A.} and Enrico Pinna and Fernando Santoro and Gelys Trancho and {Van Dam}, {Marcos A.}",

note = "Publisher Copyright: {\textcopyright} 2014 SPIE.; Adaptive Optics Systems IV ; Conference date: 22-06-2014 Through 27-06-2014",

year = "2014",

doi = "10.1117/12.2057613",

language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

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Bouchez, AH, Acton, DS, Biasi, R, Conan, R, Espeland, B, Esposito, S, Filgueira, J, Gallieni, D, McLeod, BA, Pinna, E, Santoro, F, Trancho, G & Van Dam, MA 2014, The Giant Magellan Telescope adaptive optics program. in J-P Veran, E Marchetti & LM Close (eds), Adaptive Optics Systems IV., 91480W, Proceedings of SPIE - The International Society for Optical Engineering, vol. 9148, SPIE, Adaptive Optics Systems IV, Montreal, Canada, 22/06/14. https://doi.org/10.1117/12.2057613

The Giant Magellan Telescope adaptive optics program. / Bouchez, Antonin H.; Acton, D. S.; Biasi, Roberto et al.
Adaptive Optics Systems IV. ed. / Jean-Pierre Veran; Enrico Marchetti; Laird M. Close. SPIE, 2014. 91480W (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9148).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - The Giant Magellan Telescope adaptive optics program

AU - Bouchez, Antonin H.

AU - Acton, D. S.

AU - Biasi, Roberto

AU - Conan, Rodolphe

AU - Espeland, Brady

AU - Esposito, Simone

AU - Filgueira, Josema

AU - Gallieni, Daniele

AU - McLeod, Brian A.

AU - Pinna, Enrico

AU - Santoro, Fernando

AU - Trancho, Gelys

AU - Van Dam, Marcos A.

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AB - The Giant Magellan Telescope (GMT) adaptive optics (AO) system will be an integral part of the telescope, providing laser guidestar generation, wavefront sensing, and wavefront correction to every instrument currently planned on the 25.4 m diameter GMT. There will be three first generation AO observing modes: Natural Guidestar, Laser Tomography, and Ground Layer AO. All three will use a segmented adaptive secondary mirror to deliver a corrected beam directly to the instruments. The Natural Guidestar mode will provide extreme AO performance, with a total wavefront error less than 185 nm RMS using bright guidestars. The Laser Tomography mode uses 6 lasers and a single off-axis natural guidestar to deliver better than 290 nm RMS wavefront error at the science target, over 50% of the sky at the galactic pole. The Ground Layer mode uses 4 natural guidestars on the periphery of the science field to tomographically reconstruct and correct the ground layer AO turbulence, improving the image quality for wide-field instruments. A phasing system maintains the relative alignment of the primary and secondary segments using edge sensors and continuous feedback from an off-axis guidestar. We describe the AO system preliminary design, predicted performance, and the remaining technical challenges as we move towards the start of construction.

KW - Adaptive Optics

KW - Adaptive Secondary Mirrors

KW - Extremely Large Telescopes

KW - Ground Layer AO

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DO - 10.1117/12.2057613

M3 - Conference contribution

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Adaptive Optics Systems IV

A2 - Veran, Jean-Pierre

A2 - Marchetti, Enrico

A2 - Close, Laird M.

PB - SPIE

T2 - Adaptive Optics Systems IV

Y2 - 22 June 2014 through 27 June 2014

ER -

The Giant Magellan Telescope adaptive optics program

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