Dr. Chadwick A. Trujillo Profile

Dr. Chadwick A. Trujillo

at Gemini Observatory

SPIE Involvement:

Author

Publications (14)

Proceedings Article | 4 October 2016 Paper

Real-time implementation of an LQG tip-tilt controller for regular science observation on GeMS

Gaetano Sivo, Rémy Juvénal, Caroline Kulcsár, Vincent Garrel, Pedro Gigoux, Henri-François Raynaud, Eduardo Marin, Jean-Marc Conan, Cyril Petit, William Rambold, Vanessa Montes, Cristian Moreno, Jeff Donahue, Rodrigo Carrasco, Marcos van Dam, Benoît Neichel, Lucie Leboulleux, Chad Trujillo

Proceedings Volume 9909, 99094Y (2016) https://doi.org/10.1117/12.2233191

KEYWORDS: Atmospheric optics, Gemini Observatory, Gemini Planet Imager, Adaptive optics, Telescopes, Device simulation, Data modeling, Autoregressive models, Real-time computing, Matrices

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Proceedings Article | 8 August 2016 Paper

Rejecting harmonic vibrations at Gemini with real-time vibration tracking

Mathew Rippa, Henri Bonnet, Thomas Hayward, Chadwick Trujillo, Chas Cavedoni, Tom Cumming, Chris Yamasaki, Neal Masuda, Cy Bagano, Steve Hardash

Proceedings Volume 9913, 99132M (2016) https://doi.org/10.1117/12.2231782

KEYWORDS: Gemini Observatory, Wavefronts, Telescopes, Glasses, Optical testing, Sensors, Reflectivity, Wavefront sensors, Control systems, Electronic filtering

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Proceedings Article | 27 July 2016 Paper

Correction of NIRI/ Altair non-common path aberrations using focal plane sharpening

Jesse Ball, Olivier Lai, Chadwick Trujillo, John White

Proceedings Volume 9909, 990968 (2016) https://doi.org/10.1117/12.2231811

KEYWORDS: Adaptive optics, Image quality, Point spread functions, Calibration, Actuators, Mirrors, Sensors, Gemini Observatory, Telescopes, Cameras

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Proceedings Article | 27 July 2016 Paper

Reshaping and polishing the GeMS MCAO system

Vincent Garrel, Gaetano Sivo, Eduardo Marin, Eleazar Carrasco Damele, Vanessa Montes, Manuel Lazo, Pedro Gigoux, Cristian Moreno, Chadwick Trujillo, Jeff Donahue, Marcos van Dam, Francois Rigaut, Céline d'Orgeville, Caroline Kulcsar, Remy Juvénal, Constanza Araujo Hauck, S. Mark Ammons, Benoit Neichel

Proceedings Volume 9909, 99092F (2016) https://doi.org/10.1117/12.2233747

KEYWORDS: Polishing, Gemini Observatory, Near infrared, Wavefront sensors, Calibration, Adaptive optics, Telescopes, Stars, Point spread functions, Super resolution

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Proceedings Article | 26 July 2016 Paper

NGS2: a focal plane array upgrade for the GeMS multiple tip-tilt wavefront sensor

François Rigaut, Ian Price, Céline d'Orgeville, Francis Bennet, Nick Herrald, Nicolas Paulin, Kristina Uhlendorf, Vincent Garrel, Gaetano Sivo, Vanessa Montes, Chad Trujillo

Proceedings Volume 9909, 99091X (2016) https://doi.org/10.1117/12.2230481

KEYWORDS: Wavefront sensors, Stars, Sensors, Gemini Observatory, Electroluminescent displays, Distortion, Electron multiplying charge coupled devices, Control systems, Objectives, Cameras

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Proceedings Article | 7 August 2014 Paper

Life with quintuplets: transitioning GeMS into regular operations

Vincent Garrel, Marcos Van Dam, Benoît Neichel, Fabrice Vidal, Gaetano Sivo, Eduardo Marin, Vanessa Montes, Andrew Serio, Gustavo Arriagada, Chadwick Trujillo, William Rambold, Pedro Gigoux, Ramon Galvez, Cristian Moreno, Constanza Araujo Hauck, Tomislav Vucina Parga, Jeff Donahue, Claudio Marchant, Gaston Gausachs, Fabian Collao, Eleazar Carrasco Damele, Peter Pessev, Ariel Lopez

Proceedings Volume 9148, 914829 (2014) https://doi.org/10.1117/12.2056378

KEYWORDS: Adaptive optics, Stars, Gemini Observatory, Telescopes, Wavefront sensors, Electroluminescent displays, Laser guide stars, Actuators, K band, Software development

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The Gemini Multi-conjugate adaptive optics System (GeMS) at the Gemini South telescope in Cerro Pachon is the first sodium Laser Guide Star (LGS) adaptive optics (AO) system with multiple guide stars. It uses five LGSs and two deformable mirrors (DMs) to measure and compensate for distortions induced by atmospheric turbulence. After its 2012 commissioning phase, it is now transitioning into regular operations. Although GeMS has unique scientific capabilities, it remains a challenging instrument to maintain, operate and upgrade. In this paper, we summarize the latest news and results. First, we describe the engineering work done this past year, mostly during our last instrument shutdown in 2013 austral winter, covering many subsystems: an erroneous reconjugation of the Laser guide star wavefront sensor, the correction of focus field distortion for the natural guide star wavefront sensor and engineering changes dealing with our laser and its beam transfer optics. We also describe our revamped software, developed to integrate the instrument into the Gemini operational model, and the new optimization procedures aiming to reduce GeMS time overheads. Significant software improvements were achieved on the acquisition of natural guide stars by our natural guide star wavefront sensor, on the automation of tip-tilt and higher-order loop optimization, and on the tomographic non-common path aberration compensation. We then go through the current operational scheme and present the plan for the next years. We offered 38 nights in our last semester. We review the current system efficiency in term of raw performance, completed programs and time overheads. We also present our current efforts to merge GeMS into the Gemini base facility project, where night operations are all reliably driven from our La Serena headquarter, without the need for any spotter. Finally we present the plan for the future upgrades, mostly dedicated toward improving the performance and reliability of the system. Our first upgrade called NGS2, a project lead by the Australian National University, based a focal plane camera will replace the current low throughput natural guide wavefront sensor. On a longer term, we are also planning the (re-)integration of our third deformable mirror, lost during the early phase of commissioning. Early plans to improve the reliability of our laser will be presented.

Proceedings Article | 21 July 2014 Paper

Altair performance and upgrades

Olivier Lai, Jean-Pierre Véran, Glen Herriot, John White, Jesse Ball, Chad Trujillo

Proceedings Volume 9148, 914838 (2014) https://doi.org/10.1117/12.2056948

KEYWORDS: Point spread functions, Adaptive optics, K band, Gemini Observatory, Diffraction, Signal attenuation, Wavefront sensors, Telescopes, Spatial frequencies, Convolution

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Proceedings Article | 25 September 2012 Paper

Science readiness of the Gemini MCAO System: GeMS

Benoit Neichel, Franҫois Rigaut, Andrew Serio, Gustavo Arriagada, Maxime Boccas, Céline d'Orgeville, Vincent Fesquet, Chadwick Trujillo, William Rambold, Ramon Galvez, Gaston Gausachs, Tomislav Vucina, Vanessa Montes, Cristian Urrutia, Cristian Moreno, Sarah Diggs, Claudio Araya, Javier Lührs, Gelys Trancho, Matthieu Bec, Claudio Marchant, Fabian Collao, Eleazar Carrasco, Michelle Edwards, Peter Pessev, Ariel Lopez, Herman Diaz

Proceedings Volume 8447, 84474Q (2012) https://doi.org/10.1117/12.925285

KEYWORDS: Telescopes, Stars, Electroluminescent displays, Gemini Observatory, Adaptive optics, Sensors, Mirrors, Observatories, Beam splitters, Turbulence

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Proceedings Article | 13 September 2012 Paper

Science readiness of the Gemini MCAO system: GeMS

Benoit Neichel, François Rigaut, Andrew Serio, Gustavo Arriagada, Maxime Boccas, Céline d'Orgeville, Vincent Fesquet, Chadwick Trujillo, William Rambold, Ramon Galvez, Gaston Gausachs, Tomislav Vucina, Vanessa Montes, Cristian Urrutia, Cristian Moreno, Sarah Diggs, Claudio Araya, Javier Lührs, Gelys Trancho, Matthieu Bec, Claudio Marchant, Fabian Collao, Eleazar Carrasco, Michelle Edwards, Peter Pessev, Ariel Lopez, Hernan Diaz

Proceedings Volume 8447, 84470W (2012) https://doi.org/10.1117/12.925915

KEYWORDS: Telescopes, Stars, Electroluminescent displays, Gemini Observatory, Adaptive optics, Sensors, Mirrors, Observatories, Beam splitters, Turbulence

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Proceedings Article | 13 September 2012 Paper

Increasing sky coverage with the Gemini North ALTAIR/LGS AO system

Julian Christou, Maxime Boccas, Angelic Ebbers, Richard McDermid, Richard Oram, Chadwick Trujillo, Brian Walls

Proceedings Volume 8447, 84473E (2012) https://doi.org/10.1117/12.925507

KEYWORDS: Stars, Sodium, Adaptive optics, Gemini Observatory, National Ignition Facility, Laser guide stars, Point spread functions, Rayleigh scattering, Linear filtering, Wavefront sensors

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Proceedings Article | 13 September 2012 Paper

GeMS first on-sky results

Franҫois Rigaut, Benoit Neichel, Maxime Boccas, Céline d'Orgeville, Gustavo Arriagada, Vincent Fesquet, Sarah Diggs, Claudio Marchant, Gaston Gausach, William Rambold, Javier Luhrs, Shane Walker, Eleazar Carrasco-Damele, Michelle Edwards, Peter Pessev, Ramon Galvez, Tomislav Vucina, Claudio Araya, Alejandro Gutierrez, Angelic Ebbers, Andrew Serio, Cristian Moreno, Cristian Urrutia, Rolando Rogers, Roberto Rojas, Chadwick Trujillo, Bryan Miller, Douglas Simons, Ariel Lopez, Vanessa Montes, Herman Diaz, Felipe Daruich, Felipe Colazo, Matthieu Bec, Gelys Trancho, Michael Sheehan, Peter McGregor, Peter Young, Matthew Doolan, Jan van Harmelen, Brent Ellerbroek, Damien Gratadour, Aurea Garcia-Rissmann

Proceedings Volume 8447, 84470I (2012) https://doi.org/10.1117/12.927061

KEYWORDS: Stars, Adaptive optics, Point spread functions, Error analysis, Calibration, Gemini Observatory, Actuators, Turbulence, Image quality, Observatories

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Proceedings Article | 13 September 2012 Paper

Gemini South multi-conjugate adaptive optics (GeMS) laser guide star facility on-sky performance results

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

Proceedings Volume 8447, 84471Q (2012) https://doi.org/10.1117/12.925813

KEYWORDS: Telescopes, Gemini Observatory, Sodium, Laser safety, Mirrors, Laser systems engineering, Adaptive optics, Laser guide stars, Observatories, Control systems

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Proceedings Article | 29 July 2010 Paper

Weighing black holes using open-loop focus corrections for LGS-AO observations of galaxy nuclei at Gemini Observatory

Richard McDermid, Davor Krajnovic, Michele Cappellari, Chadwick Trujillo, Julian Christou, Roger Davies

Proceedings Volume 7736, 77365W (2010) https://doi.org/10.1117/12.856572

KEYWORDS: Galactic astronomy, National Ignition Facility, Point spread functions, Adaptive optics, Telescopes, Gemini Observatory, Sodium, Stars, Kinematics, Spatial resolution

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Proceedings Article | 13 July 2010 Paper

ALTAIR performance and updates at Gemini North

Julian Christou, Benoit Neichel, Francois Rigaut, Michael Sheehan, Richard McDermid, Gelys Trancho, Chadwick Trujillo, Brian Walls

Proceedings Volume 7736, 77361R (2010) https://doi.org/10.1117/12.856776

KEYWORDS: Point spread functions, Adaptive optics, Stars, K band, Gemini Observatory, Calibration, Wavefront sensors, Telescopes, Data modeling, Laser guide stars

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Showing 5 of 14 publications

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