Preliminary on-sky results of the next generation GMT phasing sensor prototype

Derek Kopon; Brian McLeod; Antonin Bouchez; Daniel Catropa; Marcos A. Van Dam; Danielle Frostig; Jan Kansky; Ken McCracken; William Podgorski; Stuart McMuldroch; Joseph D'Arco; Laird Close; Jared R. Males; Katie Morzinski

doi:10.1117/12.2314381

Preliminary on-sky results of the next generation GMT phasing sensor prototype

Derek Kopon, Brian McLeod, Antonin Bouchez, Daniel Catropa, Marcos A. Van Dam, Danielle Frostig, Jan Kansky, Ken McCracken, William Podgorski, Stuart McMuldroch, Joseph D'Arco, Laird Close, Jared R. Males, Katie Morzinski

Astronomy

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

12 Scopus citations

Abstract

The Active optics, Guiding, and Wavefront Sensing system (AGWS), currently being designed by SAO, will use J-band dispersed fringe sensors (DFS) to phase the GMT to a fraction of an imaging wavelength. These phasing sensors will use off-axis guide stars to measure phase shifts at each of 12 segment boundaries. The fringes produced at each boundary will be dispersed in the perpendicular direction using an array of high-index doublet prisms. Inter-segment phase shifts will appear as tilts in the dispersed fringes, which can be measured in the Fourier domain. In order to avoid atmospheric blurring of the fringes, we require a J-band detector capable of fast, low-noise readout, which mandates the use of a SAPHIRA e-APD array. We built a DFS prototype that we tested on-sky at the Magellan Clay telescope behind the MagAO adaptive optics system in May 2018.

Original language	English (US)
Title of host publication	Adaptive Optics Systems VI
Editors	Dirk Schmidt, Laura Schreiber, Laird M. Close
Publisher	SPIE
ISBN (Print)	9781510619593
DOIs	https://doi.org/10.1117/12.2314381
State	Published - 2018
Event	Adaptive Optics Systems VI 2018 - Austin, United States Duration: Jun 10 2018 → Jun 15 2018

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	10703
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Other

Other	Adaptive Optics Systems VI 2018
Country/Territory	United States
City	Austin
Period	6/10/18 → 6/15/18

Keywords

Active optics
Giant Magellan Telescope
adaptive optics
dispersed fringe sensor
e-APD array
phasing

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.2314381

Cite this

Kopon, D., McLeod, B., Bouchez, A., Catropa, D., Van Dam, M. A., Frostig, D., Kansky, J., McCracken, K., Podgorski, W., McMuldroch, S., D'Arco, J., Close, L., Males, J. R., & Morzinski, K. (2018). Preliminary on-sky results of the next generation GMT phasing sensor prototype. In D. Schmidt, L. Schreiber, & L. M. Close (Eds.), Adaptive Optics Systems VI Article 107030X (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10703). SPIE. https://doi.org/10.1117/12.2314381

Preliminary on-sky results of the next generation GMT phasing sensor prototype. / Kopon, Derek; McLeod, Brian; Bouchez, Antonin et al.
Adaptive Optics Systems VI. ed. / Dirk Schmidt; Laura Schreiber; Laird M. Close. SPIE, 2018. 107030X (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10703).

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

Kopon, D, McLeod, B, Bouchez, A, Catropa, D, Van Dam, MA, Frostig, D, Kansky, J, McCracken, K, Podgorski, W, McMuldroch, S, D'Arco, J, Close, L, Males, JR & Morzinski, K 2018, Preliminary on-sky results of the next generation GMT phasing sensor prototype. in D Schmidt, L Schreiber & LM Close (eds), Adaptive Optics Systems VI., 107030X, Proceedings of SPIE - The International Society for Optical Engineering, vol. 10703, SPIE, Adaptive Optics Systems VI 2018, Austin, United States, 6/10/18. https://doi.org/10.1117/12.2314381

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title = "Preliminary on-sky results of the next generation GMT phasing sensor prototype",

abstract = "The Active optics, Guiding, and Wavefront Sensing system (AGWS), currently being designed by SAO, will use J-band dispersed fringe sensors (DFS) to phase the GMT to a fraction of an imaging wavelength. These phasing sensors will use off-axis guide stars to measure phase shifts at each of 12 segment boundaries. The fringes produced at each boundary will be dispersed in the perpendicular direction using an array of high-index doublet prisms. Inter-segment phase shifts will appear as tilts in the dispersed fringes, which can be measured in the Fourier domain. In order to avoid atmospheric blurring of the fringes, we require a J-band detector capable of fast, low-noise readout, which mandates the use of a SAPHIRA e-APD array. We built a DFS prototype that we tested on-sky at the Magellan Clay telescope behind the MagAO adaptive optics system in May 2018.",

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author = "Derek Kopon and Brian McLeod and Antonin Bouchez and Daniel Catropa and {Van Dam}, {Marcos A.} and Danielle Frostig and Jan Kansky and Ken McCracken and William Podgorski and Stuart McMuldroch and Joseph D'Arco and Laird Close and Males, {Jared R.} and Katie Morzinski",

note = "Funding Information: This work was supported by the GMTO Corporation, a non-profit organization operated on behalf of an international consortium of universities and institutions: Arizona State University, Astronomy Australia Ltd., the Australian National University, the Carnegie Institution for Science, Harvard University, the Korea Astronomy and Space Science Institute, The Sao Paolo Research Foundation, the Smithsonian Institution, The University of Texas at Austin, Texas A&M University, University of Arizona, and University of Chicago. Publisher Copyright: {\textcopyright} 2018 SPIE.; Adaptive Optics Systems VI 2018 ; Conference date: 10-06-2018 Through 15-06-2018",

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AU - Frostig, Danielle

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AU - McMuldroch, Stuart

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AU - Close, Laird

AU - Males, Jared R.

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N1 - Funding Information: This work was supported by the GMTO Corporation, a non-profit organization operated on behalf of an international consortium of universities and institutions: Arizona State University, Astronomy Australia Ltd., the Australian National University, the Carnegie Institution for Science, Harvard University, the Korea Astronomy and Space Science Institute, The Sao Paolo Research Foundation, the Smithsonian Institution, The University of Texas at Austin, Texas A&M University, University of Arizona, and University of Chicago. Publisher Copyright: © 2018 SPIE.

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N2 - The Active optics, Guiding, and Wavefront Sensing system (AGWS), currently being designed by SAO, will use J-band dispersed fringe sensors (DFS) to phase the GMT to a fraction of an imaging wavelength. These phasing sensors will use off-axis guide stars to measure phase shifts at each of 12 segment boundaries. The fringes produced at each boundary will be dispersed in the perpendicular direction using an array of high-index doublet prisms. Inter-segment phase shifts will appear as tilts in the dispersed fringes, which can be measured in the Fourier domain. In order to avoid atmospheric blurring of the fringes, we require a J-band detector capable of fast, low-noise readout, which mandates the use of a SAPHIRA e-APD array. We built a DFS prototype that we tested on-sky at the Magellan Clay telescope behind the MagAO adaptive optics system in May 2018.

AB - The Active optics, Guiding, and Wavefront Sensing system (AGWS), currently being designed by SAO, will use J-band dispersed fringe sensors (DFS) to phase the GMT to a fraction of an imaging wavelength. These phasing sensors will use off-axis guide stars to measure phase shifts at each of 12 segment boundaries. The fringes produced at each boundary will be dispersed in the perpendicular direction using an array of high-index doublet prisms. Inter-segment phase shifts will appear as tilts in the dispersed fringes, which can be measured in the Fourier domain. In order to avoid atmospheric blurring of the fringes, we require a J-band detector capable of fast, low-noise readout, which mandates the use of a SAPHIRA e-APD array. We built a DFS prototype that we tested on-sky at the Magellan Clay telescope behind the MagAO adaptive optics system in May 2018.

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ER -

Preliminary on-sky results of the next generation GMT phasing sensor prototype

Abstract

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Keywords

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