Keck Adaptive Optics Facility: Real Time Controller Upgrade

Jason C.Y. Chin; S. Cetre; P. Wizinowich; S. Ragland; S. Lilley; E. Wetherell; A. Surendran; C. Correia; E. Marin; R. Biasi; C. Patauner; D. Pescoller; K. Glazebrook; A. Jameson; W. Gauvin; F. Rigaut; D. Gratadour; J. Bernard

doi:10.1117/12.2629614

Keck Adaptive Optics Facility: Real Time Controller Upgrade

Jason C.Y. Chin, S. Cetre, P. Wizinowich, S. Ragland, S. Lilley, E. Wetherell, A. Surendran, C. Correia, E. Marin, R. Biasi, C. Patauner, D. Pescoller, K. Glazebrook, A. Jameson, W. Gauvin, F. Rigaut, D. Gratadour, J. Bernard

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

6 Citations (Scopus)

Abstract

The W. M. Keck Observatory Adaptive Optics (AO) facilities have been operating with a Field Programmable Gate Array (FPGA) based real time controller (RTC) since 2007. The RTC inputs data from various AO wavefront and tip/tilt sensors; and corrects image blurring from atmospheric turbulence via deformable and tip/tilt mirrors. Since its commissioning, the Keck I and Keck II RTCs have been upgraded to support new hardware such as pyramid wavefront and infrared tip-tilt sensors. However, they are reaching the limits of their capabilities in terms of processing bandwidth and the ability to interface with new hardware. Together with the Keck All-sky Precision Adaptive optics (KAPA) project, a higher performance and a more reliable RTC is needed to support next generation capabilities such as laser tomography and sensor fusion. This paper provides an overview of the new RTC system, developed with our contractor/collaborators (Microgate, Swinburne University of Technology and Australian National University), and the initial on-sky performance. The upgrade includes an Interface Module to interface with the wavefront sensors and controlled hardware, and a Graphical Processing Unit (GPU) based computational engine to meet the system's control requirements and to provide a flexible software architecture to allow future algorithms development and capabilities. The system saw first light in 2021 and is being commissioned in 2022 to support single conjugate laser guide star (LGS) AO, along with a more sensitive EMCCD camera. Initial results are provided to demonstrate single NGS & LGS performance, system reliability, and the planned upgrade for four LGS to support laser tomography.

Original language	English
Title of host publication	Adaptive Optics Systems VIII
Editors	Laura Schreiber, Dirk Schmidt, Elise Vernet
Publisher	SPIE
Volume	12185
ISBN (Electronic)	9781510653511
DOIs	https://doi.org/10.1117/12.2629614
Publication status	Published - 2022
Event	Adaptive Optics Systems VIII 2022 - Montreal, Canada Duration: 17 Jul 2022 → 22 Jul 2022

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	12185
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Adaptive Optics Systems VIII 2022
Country/Territory	Canada
City	Montreal
Period	17/07/22 → 22/07/22

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10.1117/12.2629614

Cite this

Chin, J. C. Y., Cetre, S., Wizinowich, P., Ragland, S., Lilley, S., Wetherell, E., Surendran, A., Correia, C., Marin, E., Biasi, R., Patauner, C., Pescoller, D., Glazebrook, K., Jameson, A., Gauvin, W., Rigaut, F., Gratadour, D., & Bernard, J. (2022). Keck Adaptive Optics Facility: Real Time Controller Upgrade. In L. Schreiber, D. Schmidt, & E. Vernet (Eds.), Adaptive Optics Systems VIII (Vol. 12185). Article 121850V (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 12185). SPIE. https://doi.org/10.1117/12.2629614

@inproceedings{d1b92f6976f24fed9a8dcf0578481ba1,

title = "Keck Adaptive Optics Facility: Real Time Controller Upgrade",

abstract = "The W. M. Keck Observatory Adaptive Optics (AO) facilities have been operating with a Field Programmable Gate Array (FPGA) based real time controller (RTC) since 2007. The RTC inputs data from various AO wavefront and tip/tilt sensors; and corrects image blurring from atmospheric turbulence via deformable and tip/tilt mirrors. Since its commissioning, the Keck I and Keck II RTCs have been upgraded to support new hardware such as pyramid wavefront and infrared tip-tilt sensors. However, they are reaching the limits of their capabilities in terms of processing bandwidth and the ability to interface with new hardware. Together with the Keck All-sky Precision Adaptive optics (KAPA) project, a higher performance and a more reliable RTC is needed to support next generation capabilities such as laser tomography and sensor fusion. This paper provides an overview of the new RTC system, developed with our contractor/collaborators (Microgate, Swinburne University of Technology and Australian National University), and the initial on-sky performance. The upgrade includes an Interface Module to interface with the wavefront sensors and controlled hardware, and a Graphical Processing Unit (GPU) based computational engine to meet the system's control requirements and to provide a flexible software architecture to allow future algorithms development and capabilities. The system saw first light in 2021 and is being commissioned in 2022 to support single conjugate laser guide star (LGS) AO, along with a more sensitive EMCCD camera. Initial results are provided to demonstrate single NGS & LGS performance, system reliability, and the planned upgrade for four LGS to support laser tomography.",

keywords = "Adaptive Optics, Keck, laser, Laser Guide Star, laser tomography, Real Time Controller",

author = "Chin, {Jason C.Y.} and S. Cetre and P. Wizinowich and S. Ragland and S. Lilley and E. Wetherell and A. Surendran and C. Correia and E. Marin and R. Biasi and C. Patauner and D. Pescoller and K. Glazebrook and A. Jameson and W. Gauvin and F. Rigaut and D. Gratadour and J. Bernard",

note = "Publisher Copyright: {\textcopyright} 2022 SPIE.; Adaptive Optics Systems VIII 2022 ; Conference date: 17-07-2022 Through 22-07-2022",

year = "2022",

doi = "10.1117/12.2629614",

language = "English",

volume = "12185",

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

publisher = "SPIE",

editor = "Laura Schreiber and Dirk Schmidt and Elise Vernet",

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Chin, JCY, Cetre, S, Wizinowich, P, Ragland, S, Lilley, S, Wetherell, E, Surendran, A, Correia, C, Marin, E, Biasi, R, Patauner, C, Pescoller, D, Glazebrook, K, Jameson, A, Gauvin, W, Rigaut, F, Gratadour, D & Bernard, J 2022, Keck Adaptive Optics Facility: Real Time Controller Upgrade. in L Schreiber, D Schmidt & E Vernet (eds), Adaptive Optics Systems VIII. vol. 12185, 121850V, Proceedings of SPIE - The International Society for Optical Engineering, vol. 12185, SPIE, Adaptive Optics Systems VIII 2022, Montreal, Canada, 17/07/22. https://doi.org/10.1117/12.2629614

Keck Adaptive Optics Facility: Real Time Controller Upgrade. / Chin, Jason C.Y.; Cetre, S.; Wizinowich, P. et al.
Adaptive Optics Systems VIII. ed. / Laura Schreiber; Dirk Schmidt; Elise Vernet. Vol. 12185 SPIE, 2022. 121850V (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 12185).

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

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AU - Wetherell, E.

AU - Surendran, A.

AU - Correia, C.

AU - Marin, E.

AU - Biasi, R.

AU - Patauner, C.

AU - Pescoller, D.

AU - Glazebrook, K.

AU - Jameson, A.

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N2 - The W. M. Keck Observatory Adaptive Optics (AO) facilities have been operating with a Field Programmable Gate Array (FPGA) based real time controller (RTC) since 2007. The RTC inputs data from various AO wavefront and tip/tilt sensors; and corrects image blurring from atmospheric turbulence via deformable and tip/tilt mirrors. Since its commissioning, the Keck I and Keck II RTCs have been upgraded to support new hardware such as pyramid wavefront and infrared tip-tilt sensors. However, they are reaching the limits of their capabilities in terms of processing bandwidth and the ability to interface with new hardware. Together with the Keck All-sky Precision Adaptive optics (KAPA) project, a higher performance and a more reliable RTC is needed to support next generation capabilities such as laser tomography and sensor fusion. This paper provides an overview of the new RTC system, developed with our contractor/collaborators (Microgate, Swinburne University of Technology and Australian National University), and the initial on-sky performance. The upgrade includes an Interface Module to interface with the wavefront sensors and controlled hardware, and a Graphical Processing Unit (GPU) based computational engine to meet the system's control requirements and to provide a flexible software architecture to allow future algorithms development and capabilities. The system saw first light in 2021 and is being commissioned in 2022 to support single conjugate laser guide star (LGS) AO, along with a more sensitive EMCCD camera. Initial results are provided to demonstrate single NGS & LGS performance, system reliability, and the planned upgrade for four LGS to support laser tomography.

AB - The W. M. Keck Observatory Adaptive Optics (AO) facilities have been operating with a Field Programmable Gate Array (FPGA) based real time controller (RTC) since 2007. The RTC inputs data from various AO wavefront and tip/tilt sensors; and corrects image blurring from atmospheric turbulence via deformable and tip/tilt mirrors. Since its commissioning, the Keck I and Keck II RTCs have been upgraded to support new hardware such as pyramid wavefront and infrared tip-tilt sensors. However, they are reaching the limits of their capabilities in terms of processing bandwidth and the ability to interface with new hardware. Together with the Keck All-sky Precision Adaptive optics (KAPA) project, a higher performance and a more reliable RTC is needed to support next generation capabilities such as laser tomography and sensor fusion. This paper provides an overview of the new RTC system, developed with our contractor/collaborators (Microgate, Swinburne University of Technology and Australian National University), and the initial on-sky performance. The upgrade includes an Interface Module to interface with the wavefront sensors and controlled hardware, and a Graphical Processing Unit (GPU) based computational engine to meet the system's control requirements and to provide a flexible software architecture to allow future algorithms development and capabilities. The system saw first light in 2021 and is being commissioned in 2022 to support single conjugate laser guide star (LGS) AO, along with a more sensitive EMCCD camera. Initial results are provided to demonstrate single NGS & LGS performance, system reliability, and the planned upgrade for four LGS to support laser tomography.

KW - Adaptive Optics

KW - Keck

KW - laser

KW - Laser Guide Star

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

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PB - SPIE

Y2 - 17 July 2022 through 22 July 2022

ER -

Keck Adaptive Optics Facility: Real Time Controller Upgrade

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