Keck Planet Imager and Characterizer (KPIC): status update

Mawet, Dimitri; Bond, C.; Delorme, Jacques Robert; Jovanović, Nemanja; Cetre, Sylvain; Chun, Mark; Echeverri, Daniel; Hall, Donald N. B.; Lilley, Scott; Wallace, J. Kent; Wizinowich, Peter

doi:10.1117/12.2314037

Cited by 25 publications

(23 citation statements)

References 26 publications

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“…Additional current and future AO system are planning on-sky use of the cacao framework. 10,11 To support wider adoption the cacao development team is improving its user interface and expanding its capabilities by providing new high performance compute libraries, 12 better integration with GPGPU hardware, and exploring FPGA support. 13 cacao is being integrated with AO simulations tools developed as part of the Green Flash project.…”

Section: Conclusion Future Workmentioning

confidence: 99%

The compute and control for adaptive optics (CACAO) real-time control software package

Guyon

Sevin

Gratadour

et al. 2018

Adaptive Optics Systems VI

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Section: Conclusion Future Workmentioning

confidence: 99%

The compute and control for adaptive optics (CACAO) real-time control software package

Guyon

Sevin

Gratadour

et al. 2018

Adaptive Optics Systems VI

Self Cite

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“…In conjunction with the Pyramid WFS KPIC includes a new Fiber Injection Unit (FIU) which will be used to feed NIRSPEC to provide high resolution spectroscopy. 11 The Pyramid WFS for KPIC will be in addition to the current Keck WFS, a 20 × 20 visible Shack-Hartmann. Initially the Pyramid WFS will drive the current Keck deformable mirror (DM), but in a second phase a higher order deformable mirror will be added to KPIC to provide higher order correction for the FIU and Pyramid WFS.…”

Section: The Keck Planet Imager and Characterizer And A Near-infraredmentioning

confidence: 99%

Adaptive optics with an infrared Pyramid wavefront sensor

Bond

Wizinowich

Chun

et al. 2018

Adaptive Optics Systems VI

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Wavefront sensing in the infrared is highly desirable for the study of M-type stars and cool red objects, as they are sufficiently bright in the infrared to be used as the adaptive optics guide star. This aids in high contrast imaging, particularly for low mass stars where the star-to-planet brightness ratio is reduced. Here we discuss the combination of infrared detector technology with the highly sensitive Pyramid wavefront sensor (WFS) for a new generation of systems. Such sensors can extend the capabilities of current telescopes and meet the requirements for future instruments, such as those proposed for the giant segmented mirror telescopes.Here we introduce the infrared Pyramid WFS and discuss the advantages and challenges of this sensor. We present a new infrared Pyramid WFS for Keck, a key sub-system of the Keck Planet Imager and Characterizer (KPIC). The design, integration and testing is reported on, with a focus on the characterization of the SAPHIRA detector used to provide the H-band wavefront sensing. Initial results demonstrate a required effective read noise < 1e − at high gain.

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“…The PWS is closely integrated with the FIU to provide the wavefront sensing. 9 The opto-mechanical design will also support the use of off-axis guide stars using a field steering mirror (FSM) assembly. This is not required for science with the NIRC2 vortex coronagraph or FIU.…”

Section: Introductionmentioning

confidence: 99%

A near-infrared pyramid wavefront sensor for Keck adaptive optics: real-time controller

Cetre

Guyon

Bond

et al. 2018

Adaptive Optics Systems VI

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A new real-time control system will be implemented within the Keck II adaptive optics system to support the new near-infrared pyramid wavefront sensor. The new real-time computer has to interface with an existing, very productive adaptive optics system. We discuss our solution to install it in an operational environment without impacting science. This solution is based on an independent SCExAO-based pyramid wavefront sensor realtime processor solution using the hardware interfaces provided by the existing Keck II real-time controller. We introduce the new pyramid real-time controller system design, its expected performance, and the modification of the operational real-time controller to support the pyramid system including interfacing with the existing deformable and tip-tilt mirrors. We describe the integration of the Saphira detector-based camera and the Boston Micromachines kilo-DM in this new architecture. We explain the software architecture and philosophy, the shared memory concept and how the real-time computer uses the power of GPUs for adaptive optics control. We discuss the strengths and weaknesses of this architecture and how it can benefit other projects. The motion control of the devices deployed on the Keck II adaptive optics bench to support the alignment of the light on the sensors is also described. The interfaces, developed to deal with the rest of the Keck telescope systems in the observatory distributed system, are reviewed. Based on this experience, we present which design ideas could have helped us integrate the new system with the previous one and the resultant performance gains.

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Keck Planet Imager and Characterizer (KPIC): status update

Cited by 25 publications

References 26 publications

The compute and control for adaptive optics (CACAO) real-time control software package

The compute and control for adaptive optics (CACAO) real-time control software package

Adaptive optics with an infrared Pyramid wavefront sensor

A near-infrared pyramid wavefront sensor for Keck adaptive optics: real-time controller

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