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1. High-Spectral Resolution Dark Holes: Concept, Results, and Promise

Author

Thompson, William, Johnson, Adam B., Marois, Christian, Lardière, Olivier, Grandmont, Frédéric, Hardy, Tim, Caputa, Kris, Bradley, Colin, and Singh, Garima

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Next generation high contrast imaging instruments face a challenging trade off: they will be required to deliver data with high spectral resolution at a relatively fast cadence (minutes) and across a wide field of view (arcseconds). For instruments that employ focal plane wavefront sensing and therefore require super-Nyquist sampling, these requirements cannot simultaneously be met with a traditional lenslet integral field spectrograph (IFU). For the SPIDERS pathfinder instrument, we are demonstrating an imaging Fourier transform spectrograph (IFTS) that offers a different set of tradeoffs than a lenslet IFU, delivering up to R20,000 spectral resolution across a dark hole. We present preliminary results from the SPIDERS IFTS including a chromaticity analysis of its dark hole and demonstrate a spectral differential imaging (SDI) improvement of up to 40 $\times$, and a first application of spectro-coherent differential imaging, combining both coherent differential imaging (CDI) and SDI., Comment: Submitted to the proceedings of adaptive optics for extremely large telescopes 7

Published
2023

2. Sample clock frequency offset (SCFO) Resolution Team 3 (RT-3) investigation

Author

Carlson, Brent, Boven, Paul, and Caputa, Kris

Subjects
Electrical Engineering and Systems Science - Signal Processing, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

This Resolution Team 3 (RT-3) report contains the results of the investigation of key aspects of the proposed Sample Clock Frequency Offset (SCFO) scheme for the Mid SKA1 telescope. This is a scheme, first proposed by one author (Carlson) at a meeting at the SKAO 25-Jan-2013, to digitize the analog signal at each antenna at a slightly different sample rate and transmit the data to the CSP Mid.CBF for subsequent digital re-sampling to a common sample clock frequency before channelization, correlation, and beamforming. The primary purpose for doing this is to cause de-correlation of sample clock-related self-interference to be able to improve correlated and beamformed signal quality. This report includes an investigation of the efficacy of the method, investigation of its implementation by SADT, DISH, and CSP, presentation of further supporting modeling results augmenting the original modeling work, a note on expansion to SKA-2, as well as possible draw-backs and concerns. Finally, there are potential additional benefits in signal quality in implementing the SCFO scheme, in particular de-correlation of aliased RFI (particularly for Nyquist Zone-2 digitized signals) as well as relaxation of signal-chain anti-aliasing filters transition band roll-off and reject band attenuation prior to digitization in the antenna., Comment: 44 pages, 20+ figures

Published
2018

3. NFIRAOS First Facility AO System for the Thirty Meter Telescope

Author

Herriot, Glen, Andersen, David, Atwood, Jenny, Boyer, Corinne, Byrnes, Peter, Caputa, Kris, Ellerbroek, Brent, Gilles, Luc, Hill, Alexis, Ljusic, Zoran, Pazder, John, Rosensteiner, Matthias, Smith, Malcolm, Spano, Paolo, Szeto, Kei, Véran, Jean-Pierre, Wevers, Ivan, Wang, Lianqi, and Wooff, Robert

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

NFIRAOS, the Thirty Meter Telescope's first adaptive optics system is an order 60x60 Multi-Conjugate AO system with two deformable mirrors. Although most observing will use 6 laser guide stars, it also has an NGS-only mode. Uniquely, NFIRAOS is cooled to -30 C to reduce thermal background. NFIRAOS delivers a 2-arcminute beam to three client instruments, and relies on up to three IR WFSs in each instrument. We present recent work including: robust automated acquisition on these IR WFSs; trade-off studies for a common-size of deformable mirror; real-time computing architectures; simplified designs for high-order NGS-mode wavefront sensing; modest upgrade concepts for high-contrast imaging., Comment: ..submitted to SPIE 9148 Astronomical Telescopes and Instrumentation - Adaptive Optics Systems IV (2014)

Published
2014
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5. Pacemaker interference by magnetic fields at power line frequencies

Author

Dawson, Trevor W., Caputa, Kris, Stuchly, Maria A., Shepard, Richard B., Kavet, Robert, and Sastre, Antonio

Subjects
Pacemaker, Artificial (Heart) -- Research, Electromagnetic interference -- Research, Power lines -- Research, Biological sciences, Business, Computers, Health care industry
Abstract

Human exposure to external 50/60-Hz electric and magnetic fields induces electric fields within the body. These induced fields can cause interference with implanted pacemakers. In the case of exposure to magnetic fields, the pacemaker leads are subject to induced electromotive forces, with current return paths being provided by the conducting body tissues. Modern computing resources used in conjunction with millimeter-scale human body conductivity models make numerical modeling a viable technique for examining any such interference. In this paper, an existing well-verified scalar-potential finite-difference frequency-domain code is modified to handle thin conducting wires embedded in the body. The effects of each wire can be included numerically by a simple modification to the existing code. Results are computed for two pacemaker lead insertion paths, terminating at either atrial or ventricular electrodes in the heart. Computations are performed for three orthogonal 60-Hz magnetic field orientations. Comparison with simplified estimates from Faraday's law applied directly to extracorporeal loops representing unipolar leads underscores problems associated with this simplified approach. Numerically estimated electromagnetic interference (EMI) levels under the worst case scenarios are about 40 [mu]T for atrial electrodes, and 140 [mu]T for ventricular electrodes. These methods could also be applied to studying EMI with other implanted devices such as cardiac defibrillators. Index Terms--Cardiac pacemaker, electromagnetic interference, modeling, power lines.

Published
2002

6. High-resolution magnetic field numerical dosimetry for live-line workers

Author

Dawson, Trevor W., Caputa, Kris, and Stutchy, Maria A.

Subjects
Magnetic fields -- Measurement, Electric power transmission -- Research, Electrical conductivity -- Research, Electromagnetic radiation -- Measurement, Finite element method -- Usage, Business, Electronics, Electronics and electrical industries
Abstract

Numerical modeling provides one means for realistic assessment of the electric field and current density levels induced in the bodies of live-line utility workers during occupational exposure to 60-Hz nonuniform magnetic fields. An efficient scalar potential finite difference method is applied to anatomically-derived high-resolution heterogeneous human body conductivity models, to provide such estimates for four representative posture and exposure scenarios. Dosimetric data are presented in terms of volumetric maximum and root mean square fields induced in various tissue groups by unit current. The results scale linearly with total source current, which allows the data to be applied to arbitrary current levels. Index Terms: Power transmission biological effects, Conductivity, Magnetic field effects, Electromagnetic analysis, Frequency domain analysis, Finite difference methods

Published
1999

7. High-resolution organ dosimetry for human exposure to low-frequency electric fields

Author

Dawson, Trevor W., Caputa, Kris, and Stuchly, Maria A.

Subjects
Electric fields -- Research, Body, Human -- Magnetic fields, Radiation dosimetry -- Research, Business, Computers, Electronics, Electronics and electrical industries
Abstract

Evaluation of the fields induced in the human body, provides a means of quantification of various exposures to low-frequency electric and magnetic fields. A new hybrid numerical method is used to compute these quantities, generated in an anatomically-based high-resolution human body model, by low-frequency uniform electric fields. The hybrid method combines scalar-potential finite-difference and quasistatic finite-difference time-domain methods, and is capable of accurately computing the induced fields in a full-body model composed of 1 736 872 cubic voxels with 3.6-mm edges. Results specific to various organs are given for exposure to 60-Hz fields, with the body model in three positions relative to a ground-plane. The effect of tissue conductivity is investigated. The data presented can be linearly scaled to frequencies up to 100 kHz without appreciable error, provided that changes of tissue conductivity with frequency are taken into account. Evaluations such as the present one should prove useful in the development of protection standards, and are also expected to aid in the understanding of results from various animal and tissue culture studies. Keywords: Power transmission biological effects, Biological organs, Conductivity, Electric field effects, Electromagnetic analysis, Electromagnetic induction, FDTD methods, Frequency domain analysis, Finite difference methods.

Published
1998

9. Pacemaker Interference and Low-Frequency Electric Induction in Humans by External Fields and Electrodes

Author

Dawson, Trevor W., Stuchly, Maria A., Caputa, Kris, Sastre, Antonio, Shepard, Richard B., and Kavet, Robert

Subjects
Pacemaker, Artificial (Heart) -- Research, Electromagnetic interference -- Research, Power lines -- Health aspects, Biological sciences, Business, Computers, Health care industry
Abstract

The possibility of interference by low-frequency external electric fields with cardiac pacemakers is a matter of practical concern. For pragmatic reasons, experimental investigations into such interference have used contact electrode current sources. However, the applicability to the external electric field problem remains unclear. The recent development of anatomically based electromagnetic models of the human body, together with progress in computational electromagnetics, enable the use of numerical modeling to quantify the relationship between external field and contact electrode excitation. This paper presents a comparison between the computed fields induced in a 3.6-mm-resolution conductivity model of the human body by an external electric field and by several electrode source configurations involving the feet and either the head or shoulders. The application to cardiac pacemaker interference is also indicated. Index Terms--Cardiac pacemaker, electromagnetic interference, modeling, power lines.

Published
2000

10. TMT NFIRAOS: adaptive optics for the Thirty Meter Telescope

Author

Herriot, Glen, Andersen, David, Atwood, Jenny, Byrnes, Peter, Boucher, Marc-André, Boyer, Corinne, Caputa, Kris, Correia, Carlos, Dunn, Jennifer, Ellerbroek, Brent, Fitzsimmons, Joeleff, Gilles, Luc, Hickson, Paul, Hill, Alexis, Kerley, Dan, Pazder, John, Reshetov, Vlad, Roberts, Scott, Smith, Malcolm, Véran, Jean-Pierre, Wang, Lianqi, and Wevers, Ivan

Subjects
High precision, Optical telescopes, First-light adaptive optics system, Multi-conjugate adaptive optics systems, Conducting performance, Laser guide star, Field of views, Diffraction limited, NFIRAOS, Sky coverage
Abstract

NFIRAOS is the first-light adaptive optics system planned for the Thirty Meter Telescope, and is being designed at the National Research Council of Canada's Herzberg Institute of Astrophysics. NFIRAOS is a laser guide star multi-conjugate adaptive optics system - a practical approach to providing diffraction limited image quality in the NIR over a 30" field of view, with high sky coverage. This will enable a wide range of TMT science that depends upon the large corrected field of view and high precision astrometry and photometry. We review recent progress developing the design and conducting performance estimates for NFIRAOS., Adaptive Optics Systems III, July 1-6, 2012, Amsterdam, Netherlands, Series: Proceedings of SPIE

Published
2012

11. The TMT Adaptive Optics Program

Author

Ellerbroek, Brent, Adkins, Sean, Andersen, David, Atwood, Jenny, Bastard, Arnaud, Bo, Yong, Boucher, Marc-Andre, Boyer, Corinne, Byrnes, Peter, Caputa, Kris, Chen, Shanqui, Correia, Carlos, Cousty, Raphael, Fitzsimmons, Joeleff, Gilles, Luc, Gregory, James, Herriot, Glen, Hickson, Paul, Hill, Alexis, Pazder, John, Pages, Hubert, Pfrommer, Thomas, Reshetov, Vladimir, Roberts, Scott, Sinquin, Jean-Christophe, Schoeck, Matthias, Smith, Malcolm, Veran, Jean-Pierre, Wang, Lianqi, Wei, Kai, and Wevers, Ivan

Subjects
ADAPTIVE OPTICS, WAVEFRONT CORRECTORS, REAL-TIME CONTROL, PATHFINDERS, ATMOSPHERIC TURBULENCE, MODELING, POST-PROCESSING, INSTRUMENTS, EXTREMELY LARGE TELESCOPES, WAVEFRONT SENSING, LASER GUIDE STAR SYSTEMS
Abstract

We provide an overview of the Thirty Meter Telescope (TMT) AO program, with an emphasis upon the progress made since the first AO4ELT conference held in 2009.

Published
2011
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12. Prototype Small Footprint Amplifier for Piezoelectric Deformable Mirrors

Author

Caputa, Kris, Herriot, Glen, Niebergal, Joel, and Zielinski, Adam

Subjects
ADAPTIVE OPTICS, WAVEFRONT CORRECTORS, REAL-TIME CONTROL, PATHFINDERS, ATMOSPHERIC TURBULENCE, MODELING, POST-PROCESSING, INSTRUMENTS, EXTREMELY LARGE TELESCOPES, WAVEFRONT SENSING, LASER GUIDE STAR SYSTEMS
Abstract

Adaptive Optics (AO) systems of the Extremely Large Telescopes (ELT) will incorporate deformable mirrors with an order of magnitude larger number of piezoelectric actuators than the AO systems currently deployed. Simply scaling up the drive electronics offered commercially would substantially drive up the AO cost, pose unacceptably high demands for the supply power, and occupy large volume. We are progressing on the design of a compact high voltage amplifier with the goal to have a Deformable Mirror (DM) drive density of 1200 channels per 6U VME crate. Amplifiers will be driven by multichannel D/A converters, consume no more than 0.5 W power each, be slew rate limited in hardware, and be short-circuit protected. In addition, the cost per amplifier is expected to be drastically lower compared to the integrated circuit amplifier currently used in smaller scale AO systems. Several suitable circuits using inexpensive components have been conceived and investigated by computer simulation and built. In this paper we present experimental results of prototype circuits exposed to both normal operating conditions and foreseeable fault conditions. The performance is evaluated against the AO requirements for the output range and bandwidth as well as the DM actuator operational safety requirements.

Published
2011
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13. NFIRAOS: first facility AO system for the Thirty Meter Telescope

Author

Marchetti, Enrico, Close, Laird M., Véran, Jean-Pierre, Herriot, Glen, Andersen, David, Atwood, Jenny, Boyer, Corinne, Byrnes, Peter W. G., Caputa, Kris, Ellerbroek, Brent, Gilles, Luc, Hill, Alexis, Ljusic, Zoran, Pazder, John, Rosensteiner, Matthias, Smith, Malcolm, Spano, Paolo, Szeto, Kei, Wevers, Ivan, Wang, Lianqi, Wooff, Robert, Marchetti, Enrico, Close, Laird M., Véran, Jean-Pierre, Herriot, Glen, Andersen, David, Atwood, Jenny, Boyer, Corinne, Byrnes, Peter W. G., Caputa, Kris, Ellerbroek, Brent, Gilles, Luc, Hill, Alexis, Ljusic, Zoran, Pazder, John, Rosensteiner, Matthias, Smith, Malcolm, Spano, Paolo, Szeto, Kei, Wevers, Ivan, Wang, Lianqi, and Wooff, Robert

Abstract

NFIRAOS, the Thirty Meter Telescope’s first adaptive optics system is an order 60x60 Multi-Conjugate AO system with two deformable mirrors. Although most observing will use 6 laser guide stars, it also has an NGS-only mode. Uniquely, NFIRAOS is cooled to -30 °C to reduce thermal background. NFIRAOS delivers a 2-arcminute beam to three client instruments, and relies on up to three IR WFSs in each instrument. We present recent work including: robust automated acquisition on these IR WFSs; trade-off studies for a common-size of deformable mirror; real-time computing architectures; simplified designs for high-order NGS-mode wavefront sensing; modest upgrade concepts for high-contrast imaging.

Published
2014

15. The Gemini planet imager: first light and commissioning

Author

Macintosh, Bruce A., additional, Anthony, Andre, additional, Atwood, Jenny, additional, Bauman, Brian, additional, Cardwell, Andrew, additional, Caputa, Kris, additional, Chilcote, Jeffery, additional, De Rosa, Robert J., additional, Dillon, Daren, additional, Doyon, René, additional, Dunn, Jennifer, additional, Erickson, Darren, additional, Fitzgerald, Michael P., additional, Gavel, Donald T., additional, Galvez, Ramon, additional, Goodsell, Stephen, additional, Graham, James, additional, Greenbaum, Alexandra Z., additional, Hartung, Markus, additional, Hibon, Pascale, additional, Ingraham, Patrick, additional, Kerley, Dan, additional, Konopacky, Quinn, additional, Labrie, Kathleen, additional, Larkin, James, additional, Maire, Jerome, additional, Marchis, Franck, additional, Marois, Christian, additional, Millar-Blanchaer, Max, additional, Morzinski, Katie, additional, Nunez, Arturo, additional, Oppenheimer, Rebecca, additional, Palmer, David, additional, Pazder, John, additional, Perrin, Marshall, additional, Poyneer, Lisa A., additional, Pueyo, Laurent, additional, Quiroz, Carlos, additional, Rantakyro, Fredrik, additional, Reshetov, Vlad, additional, Saddlemyer, Les, additional, Sadakuni, Naru, additional, Savransky, Dmitry, additional, Serio, Andrew, additional, Sivaramakrishnan, Anand, additional, Smith, Malcolm, additional, Soummer, Remi, additional, Thomas, Sandrine, additional, Wallace, J. K., additional, Wang, Jason, additional, Weiss, Jason, additional, Wiktorowicz, Sloane, additional, and Wolff, Schuyler G., additional

Published
2014
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16. Adaptive optics program at TMT

Author

Boyer, C., additional, Adkins, Sean, additional, Andersen, David R., additional, Atwood, Jenny, additional, Bo, Yong, additional, Byrnes, Peter, additional, Caputa, Kris, additional, Cavaco, Jeff, additional, Ellerbroek, Brent, additional, Gilles, Luc, additional, Gregory, James, additional, Herriot, Glen, additional, Hickson, Paul, additional, Ljusic, Zoran, additional, Manter, Darren, additional, Marois, Christian, additional, Otárola, Angel, additional, Pagès, Hubert, additional, Schoeck, Matthias, additional, Sinquin, Jean-Christophe, additional, Smith, Malcolm, additional, Spano, Paolo, additional, Szeto, Kei, additional, Tang, Jinlong, additional, Travouillon, Tony, additional, Véran, Jean-Pierre, additional, Wang, Lianqi, additional, and Wei, Kai, additional

Published
2014
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17. NFIRAOS: first facility AO system for the Thirty Meter Telescope

Author

Herriot, Glen, additional, Andersen, David, additional, Atwood, Jenny, additional, Boyer, Corinne, additional, Byrnes, Peter, additional, Caputa, Kris, additional, Ellerbroek, Brent, additional, Gilles, Luc, additional, Hill, Alexis, additional, Ljusic, Zoran, additional, Pazder, John, additional, Rosensteiner, Matthias, additional, Smith, Malcolm, additional, Spano, Paolo, additional, Szeto, Kei, additional, Véran, Jean-Pierre, additional, Wevers, Ivan, additional, Wang, Lianqi, additional, and Wooff, Robert, additional

Published
2014
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18. TMT NFIRAOS: adaptive optics system for the Thirty Meter Telescope

Author

Ellerbroek, Brent L., Marchetti, Enrico, Véran, Jean-Pierre, Herriot, Glen, Andersen, David, Atwood, Jenny, Byrnes, Peter, Boucher, Marc-Andre, Boyer, Corrine, Caputa, Kris, Correia, Carlos, Dunn, Jennifer, Ellerbroek, Brent, Fitzsimmons, Joeleff, Gilles, Luc, Hickson, Paul, Hill, Alexis, Kerley, Dan, Pazder, John, Reshetov, Vlad, Roberts, Scott, Smith, Malcolm, Wang, Lianqi, Wevers, Ivan, Ellerbroek, Brent L., Marchetti, Enrico, Véran, Jean-Pierre, Herriot, Glen, Andersen, David, Atwood, Jenny, Byrnes, Peter, Boucher, Marc-Andre, Boyer, Corrine, Caputa, Kris, Correia, Carlos, Dunn, Jennifer, Ellerbroek, Brent, Fitzsimmons, Joeleff, Gilles, Luc, Hickson, Paul, Hill, Alexis, Kerley, Dan, Pazder, John, Reshetov, Vlad, Roberts, Scott, Smith, Malcolm, Wang, Lianqi, and Wevers, Ivan

Abstract

NFIRAOS is the first-light adaptive optics system planned for the Thirty Meter Telescope, and is being designed at the National Research Council of Canada's Herzberg Institute of Astrophysics. NFIRAOS is a laser guide star multiconjugate adaptive optics system - a practical approach to providing diffraction limited image quality in the NIR over a 30" field of view, with high sky coverage. This will enable a wide range of TMT science that depends upon the large corrected field of view and high precision astrometry and photometry. We review recent progress developing the design and conducting performance estimates for NFIRAOS.

Published
2012

19. The Gemini Planet Imager: integration and status

Author

Macintosh, Bruce A., primary, Anthony, Andre, additional, Atwood, Jennifer, additional, Barriga, Nicolas, additional, Bauman, Brian, additional, Caputa, Kris, additional, Chilcote, Jeffery, additional, Dillon, Daren, additional, Doyon, René, additional, Dunn, Jennifer, additional, Gavel, Donald T., additional, Galvez, Ramon, additional, Goodsell, Stephen J., additional, Graham, James R., additional, Hartung, Markus, additional, Isaacs, Joshua, additional, Kerley, Dan, additional, Konopacky, Quinn, additional, Labrie, Kathleen, additional, Larkin, James E., additional, Maire, Jerome, additional, Marois, Christian, additional, Millar-Blanchaer, Max, additional, Nunez, Arturo, additional, Oppenheimer, Ben R., additional, Palmer, David W., additional, Pazder, John, additional, Perrin, Marshall, additional, Poyneer, Lisa A., additional, Quirez, Carlos, additional, Rantakyro, Frederik, additional, Reshtov, Vlad, additional, Saddlemyer, Leslie, additional, Sadakuni, Naru, additional, Savransky, Dmitry, additional, Sivaramakrishnan, Anand, additional, Smith, Malcolm, additional, Soummer, Remi, additional, Thomas, Sandrine, additional, Wallace, J. Kent, additional, Weiss, Jason, additional, and Wiktorowicz, Sloane, additional

Published
2012
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21. TMT NFIRAOS: adaptive optics system for the Thirty Meter Telescope

Author

Herriot, Glen, primary, Andersen, David, additional, Atwood, Jenny, additional, Byrnes, Peter, additional, Boucher, Marc-André, additional, Boyer, Corinne, additional, Caputa, Kris, additional, Correia, Carlos, additional, Dunn, Jennifer, additional, Ellerbroek, Brent, additional, Fitzsimmons, Joeleff, additional, Gilles, Luc, additional, Hickson, Paul, additional, Hill, Alexis, additional, Kerley, Dan, additional, Pazder, John, additional, Reshetov, Vlad, additional, Roberts, Scott, additional, Smith, Malcolm, additional, Véran, Jean-Pierre, additional, Wang, Lianqi, additional, and Wevers, Ivan, additional

Published
2012
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22. TMT adaptive optics program status report

Author

Ellerbroek, Brent L., primary, Adkins, Sean M., additional, Andersen, David R., additional, Atwood, Jenny, additional, Bastard, Arnaud, additional, Bo, Yong, additional, Boucher, Marc-Andre, additional, Boyer, Corinne, additional, Byrnes, Peter W. G., additional, Caputa, Kris, additional, Chen, Shanqiu, additional, Correia, Carlos, additional, Cousty, Raphael, additional, Fitzsimmons, Joeleff T., additional, Gilles, Luc, additional, Gregory, James, additional, Herriot, Glen, additional, Hickson, Paul, additional, Hill, Alexis, additional, Pazder, John, additional, Pagès, Hubert, additional, Pfrommer, Thomas, additional, Reshetov, Vladimir A., additional, Roberts, Scott, additional, Sinquin, Jean-Christophe, additional, Schoeck, Matthias, additional, Smith, Malcolm, additional, Véran, Jean-Pierre, additional, Wang, Lianqi, additional, Wei, Kai, additional, and Wevers, Ivan, additional

Published
2012
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24. NFIRAOS —TMT Early Light Adaptive Optics System

Author

Herriot, Glen, primary, Andersen, David, additional, Atwood, Jenny, additional, Byrnes, Peter, additional, Boyer, Corinne, additional, Caputa, Kris, additional, Correia, Carlos, additional, Dunn, Jennifer, additional, Ellerbroek, Brent, additional, Fitzsimmons, Joeleff, additional, Gilles, Luc, additional, Hickson, Paul, additional, Hill, Alexis, additional, Pazder, John, additional, Reshetov, Vlad, additional, Roberts, Scott, additional, Smith, Malcolm, additional, Véran, Jean-Pierre, additional, Wang, Lianqi, additional, and Wevers, Ivan, additional

Published
2011
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25. First light adaptive optics systems and components for the Thirty Meter Telescope

Author

Ellerbroek, Brent, primary, Adkins, Sean, additional, Andersen, David, additional, Atwood, Jennifer, additional, Browne, Steve, additional, Boyer, Corinne, additional, Byrnes, Peter, additional, Caputa, Kris, additional, Conan, Rodolphe, additional, Cousty, Raphael, additional, Erikson, Daren, additional, Fitzsimmons, Joeleff, additional, Gamache, Frederick, additional, Gilles, Luc, additional, Herriot, Glen, additional, Hickson, Paul, additional, Lardier, Olivier, additional, Morin, Pierre, additional, Pazder, John, additional, Pfrommer, Thomas, additional, Quinn, David, additional, Reshetov, Vladimir, additional, Roberts, Scott, additional, Sinquin, Jean-Christophe, additional, Schoeck, Matthias, additional, Smith, Malcolm, additional, Tyler, Glenn, additional, Vaughn, Jeff, additional, Veran, Jean-Pierre, additional, Vogel, Curt, additional, Wang, Lianqi, additional, and Wevers, Ivan, additional

Published
2010
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26. The Gemini Planet Imager coronagraph testbed

Author

Soummer, Rémi, primary, Sivaramakrishnan, Anand, additional, Oppenheimer, Ben R., additional, Roberts, Robin, additional, Brenner, Douglas, additional, Carlotti, Alexis, additional, Pueyo, Laurent, additional, Macintosh, Bruce, additional, Bauman, Brian, additional, Saddlemyer, Les, additional, Palmer, David, additional, Erickson, Darren, additional, Dorrer, Christophe, additional, Caputa, Kris, additional, Marois, Christian, additional, Wallace, Kent, additional, Griffiths, Emily, additional, and Mey, Jacob, additional

Published
2009
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28. The Gemini Planet Imager coronagraph testbed.

Author

Soummer, Rémi, Sivaramakrishnan, Anand, Oppenheimer, Ben R., Roberts, Robin, Brenner, Douglas, Carlotti, Alexis, Pueyo, Laurent, Macintosh, Bruce, Bauman, Brian, Saddlemyer, Les, Palmer, David, Erickson, Darren, Dorrer, Christophe, Caputa, Kris, Marois, Christian, Wallace, Kent, Griffiths, Emily, and Mey, Jacob

Published
2009
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33. Adaptive optics program at TMT

Author

Marchetti, Enrico, Close, Laird M., Véran, Jean-Pierre, Boyer, C., Adkins, Sean, Andersen, David R., Atwood, Jenny, Bo, Yong, Byrnes, Peter, Caputa, Kris, Cavaco, Jeff, Ellerbroek, Brent, Gilles, Luc, Gregory, James, Herriot, Glen, Hickson, Paul, Ljusic, Zoran, Manter, Darren, Marois, Christian, Otárola, Angel, Pagès, Hubert, Schoeck, Matthias, Sinquin, Jean-Christophe, Smith, Malcolm, Spano, Paolo, Szeto, Kei, Tang, Jinlong, Travouillon, Tony, Véran, Jean-Pierre, Wang, Lianqi, and Wei, Kai

Published
2014
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34. The Gemini planet imager: first light and commissioning

Author

Marchetti, Enrico, Close, Laird M., Véran, Jean-Pierre, Macintosh, Bruce A., Anthony, Andre, Atwood, Jenny, Bauman, Brian, Cardwell, Andrew, Caputa, Kris, Chilcote, Jeffery, De Rosa, Robert J., Dillon, Daren, Doyon, René, Dunn, Jennifer, Erickson, Darren, Fitzgerald, Michael P., Gavel, Donald T., Galvez, Ramon, Goodsell, Stephen, Graham, James, Greenbaum, Alexandra Z., Hartung, Markus, Hibon, Pascale, Ingraham, Patrick, Kerley, Dan, Konopacky, Quinn, Labrie, Kathleen, Larkin, James, Maire, Jerome, Marchis, Franck, Marois, Christian, Millar-Blanchaer, Max, Morzinski, Katie, Nunez, Arturo, Oppenheimer, Rebecca, Palmer, David, Pazder, John, Perrin, Marshall, Poyneer, Lisa A., Pueyo, Laurent, Quiroz, Carlos, Rantakyro, Fredrik, Reshetov, Vlad, Saddlemyer, Les, Sadakuni, Naru, Savransky, Dmitry, Serio, Andrew, Sivaramakrishnan, Anand, Smith, Malcolm, Soummer, Remi, Thomas, Sandrine, Wallace, J. K., Wang, Jason, Weiss, Jason, Wiktorowicz, Sloane, and Wolff, Schuyler G.

Published
2014
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