Mr. Aidan C. Gray Profile

Aidan C. Gray

at Johns Hopkins Univ

SPIE Involvement:

Author

Publications (14)

Proceedings Article | 26 August 2024 Presentation + Paper

A precision cryogenic positioning stage for detector dithering and flexure compensation

Stephen Smee, Stephen Hope, Randolph Hammond, Albert Harding, Tyson Hare, Aidan Gray, Katherine Smee, Leon Aslan, Robert Barkhouser, Andrea Bianco, Christoph Birk, Maren Cosens, Michele Frangiamore, Daniel Kelson, Gerrad Killian, Nicholas Konidaris, Alicia Lanz, Jacob McCloskey, Andrew Newman, Solange Ramirez, Gwen Rudie, Andrea Vanella, Jason Williams

Proceedings Volume 13100, 131002Y (2024) https://doi.org/10.1117/12.3020298

KEYWORDS: Sensors, Cryogenics, Equipment, Design, Cameras, Actuators, Motion measurement, Motion analysis, Telescopes, Interfaces

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Proceedings Article | 15 August 2024 Presentation + Paper

Prime Focus Spectrograph (PFS) for Subaru Telescope: progressing final steps to science operation

Naoyuki Tamura, Kiyoto Yabe, Shintaro Koshida, Yuki Moritani, Masayuki Tanaka, Miho Ishigaki, Yuki Ishizuka, Yukiko Kamata, Ali Allaoui, Akira Arai, Stéphane Arnouts, Rudy Barette, Robert Barkhouser, Eddie Bergeron, Patrick Blanchard, Neven Caplar, Michael Carle, Pierre-Yves Chabaud, Yin-Chang Chang, Hsin-Yo Chen, Richard C. Chou, Judith Cohen, Ricardo Costa, Thibaut Crauchet, Rodorigo de Almeida, Antonio de Oliveira, Ligia de Oliveira, Kjetil Dohlen, Leandro dos Santos, László Dobos, Richard Ellis, Steve Ertel, Maximilian Fabricius, Décio Ferreira, Hisanori Furusawa, Wilfred Gee, Javier Garciá-Carpio, Roman Gerasimov, Mirek Golebiowski, Aidan Gray, James Gunn, ChangHoon Hahn, Satoshi Hamano, Randolph Hammond, Albert Harding, Takashi Hattori, Kota Hayashi, Wanqiu He, Timothy Heckman, Stephen Hope, Shu-Fu Hsu, Pin-Jie Huang, Marc Jaquet, Eric Jeschke, Christian Jespersen, Yipeng Jing, Russell Kackley, Jennifer Karr, Satoshi Kawanomoto, Masahiko Kimura, Evan Kirby, Michitaro Koike, Eiichiro Komatsu, Yusei Koyama, Vincent Le Brun, Arnaud Le Fur, David Le Mignant, Gerald Lemson, Yen-Ting Lin, Hung-Hsu Ling, Craig Loomis, Robert Lupton, Fabrice Madec, Danilo Marchesini, Lucas Marrara, Dmitry Medvedev, Sogo Mineo, Arik Mitschang, Satoshi Miyazaki, Kumiko Morihana, Takahiro Morishima, Hitoshi Murayama, Graham Murray, Sakurako Okamoto, Hirofumi Okita, Masato Onodera, Vera Passegger, Joshua Peebles, Paul Price, Tae-Soo Pyo, Lucio Ramos, Daniel Reiley, Martin Reinecke, Mitsuko Roberts, Josemar Rosa, Julien Rousselle, Kody Rubio, Kiaina Schubert, Michael Seiffert, Jared Siegel, Stephen Smee, Laerte Sodré, Michael Strauss, Tomomi Sunayama, Christian Surace, Masahiro Takada, Yuhei Takagi, Ichi Tanaka, Yoko Tanaka, Aniruddha Thakar, Didier Vibert, Shiang-Yu Wang, Chih-Yi Wen, Suzanne Werner, Matthew Wung, Chi-Hung Yan, Naoki Yasuda, Hiroshige Yoshida

Proceedings Volume 13096, 1309605 (2024) https://doi.org/10.1117/12.3015967

KEYWORDS: Telescopes, Equipment, Engineering, Cameras, Calibration, Observatories, Stars, Near infrared, Observational astronomy, Spectrographs

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The instrumentation of the Prime Focus Spectrograph (PFS), a next generation facility instrument on the Subaru telescope, is now in the final phase of its commissioning process and its general, open-use operations for sciences will provisionally start in 2025. The instrument enables simultaneous spectroscopy with 2386 individual fibers distributed over a very wide (∼1.3 degrees in diameter) field of view on the Subaru’s prime focus. The spectra cover a wide range of wavelengths from 380nm to 1260nm in one exposure in the Low-Resolution (LR) mode (while the visible red channel has the Medium-Resolution (MR) mode as well that covers 710−885nm). The system integration activities at the observatory on Maunakea in Hawaii have been continuing since the arrival of the Metrology Camera System in 2018. On-sky engineering tests and observations have also been carried out continually since September 2021 and, despite various difficulties in interlacing commissioning processes with development activities on the schedule and addressing some major issues on hardware and software, the team successfully observed many targeted stars as intended over the entire field of view (Engineering First Light) in September 2022. Then in parallel to the arrival, integration and commissioning of more hardware components, validations and optimizations of the performance and operation of the instrument are ongoing. The accuracy of the fiber positioning process and the speed of the fiber reconfiguration process have been recently confirmed to be ∼ 20−30μm for 95% of allocated fibers, and ∼130 seconds, respectively. While precise quantitative analyses are still in progress, the measured throughput has been confirmed to be consistent with the model where the information from various sub-components and sub-assemblies is integrated. Long integration of relatively faint objects are being taken to validate an expected increase of signal-to-noise ratio as more exposures are taken and co-added without any serious systematic errors from, e.g., sky subtraction process. The PFS science operation will be carried out in a queue mode by default and various developments, implementations and validations have been underway accordingly in parallel to the instrument commissioning activities. Meetings and sessions are arranged continually with the communities of potential PFS users on multiple scales, and discussions are iterated for mutual understanding and possible optimization of the rules and procedures over a wide range of processes such as proposal submission, observation planning, data acquisition and data delivery. The end-to-end processes of queue observations including successive exposures with updated plans based on assessed qualities of the data from past observations are being tested during engineering observations, and further optimizations are being undertaken. In this contribution, a top-level summary of these achievements and ongoing progresses and future perspectives will be provided.

Proceedings Article | 18 July 2024 Paper

Assembly, integration, and verification phase of the SCORPIO instrument for Gemini South

Massimo Robberto, Peter W. Roming, Cynthia Froning, Scott Sutherland, Todd Veach, Kelly Smith, Linda Theis, Adam Thorton, Tyler Barnes, Paul Schlueter, Rebecca Thibodeaux, Andrew Peterson, Alexa Mathias, Trent Peterson, Jeff Desmarais, Thomas Lechner, Dana Koeppe, Marísa Luisa García-Vargas, Manuel Maldonado Medina, Ana Pérez Calpena, Ernesto Sánchez Blanco, Gerardo Veredas, Andreas Seifahrt, David Henderson, Brian Chinn, Alena Cicakova, Laura Funk, Pablo Prado, Rodolfo Angeloni, Ruben Diaz, Thomas Hayward, Kathleen Labrie, Francisco Ramos, Rolando Rogers, Jose Varas, Sergio Troncoso, Ignacio Arriagada, Lindsay Magill, Oyku Galvan, Alexander van der Horst, Landon Gelman, Stephen Smee, Stephen Hope, Aidan Gray, Robert Barkhouser

Proceedings Volume 13096, 130968J (2024) https://doi.org/10.1117/12.3020621

KEYWORDS: Equipment, Cryostats, Optical benches, Gemini Observatory, Infrared radiation, Near infrared, Titanium, Cameras, Telescopes, Optical components

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Proceedings Article | 18 July 2024 Poster + Paper

Prime Focus Spectrograph (PFS) for Subaru Telescope: recovery of the VPHG efficiency

Kjetil Dohlen, Fabrice Madec, James Gunn, Yuki Moritani, Mirek Golebiowski, Randolph Hammond, Patrick Blanchard, Michael Carle, Aidan Gray, Robert Barkhouser, Vincent Lapere, Marc Jaquet, Shintaro Koshida, Robert Lupton, David Le Mignant, Julien Rousselle, Stephen Smee, Kiyoto Yabe, Naoyuki Tamura

Proceedings Volume 13096, 130962K (2024) https://doi.org/10.1117/12.3020245

KEYWORDS: Spectrographs, Equipment, Telescopes, Optical gratings, Manufacturing, Diffraction gratings, Design, Prisms, Diffraction, Optical components

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Proceedings Article | 18 July 2024 Poster + Paper

Prime Focus Spectrograph (PFS) for Subaru Telescope: spectrograph system final integration and performance at LAM and Subaru

Fabrice Madec, David Le Mignant, Kjetil Dohlen, Rudy Barette, Patrick Blanchard, Jean-Antoine Benedetti, Michael Carle, Thibaut Crauchet, Romain Lhoussaine, Patrick Vors, Marc Jaquet, Naoyuki Tamura, Yuki Moritani, Josh Peebles, Julien Rousselle, Arnaud Le Fur, Craig Loomis, Shintaro Koshida, Vincent Lapere, Marc Dierickx, Emilien Hupel, James Gunn, Mirek Golebiowski, Randolph Hammond, Stephen Hope, Stephen Smee, Robert Barkhouser, Aidan Gray, Paul Price, Robert Lupton, Antonio Cesar de Oliveira, Ligia Souza de Oliveira, Graham Murray, Stéphanie Chatelain, Jean-Baptiste Abele

Proceedings Volume 13096, 130962P (2024) https://doi.org/10.1117/12.3019805

KEYWORDS: Cameras, Spectrographs, Sensors, Telescopes, Transportation, Optical components, Near infrared, Diffusion, Spectral resolution, Integration, Testing and analysis

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The Spectrograph System (SpS) of Subaru Prime Focus Spectrograph is fed by 2400 fibers and consists of four identical spectrograph modules with 4 arms and 600 fibers each. This paper outlines the overall integration process for the spectrograph module series as completed at the Subaru Telescope. Many partners from the Subaru PFS Collaboration and industry contributed to this large multi-object spectrograph system. The initial integration of the so-called "one-channel prototype" began in 2015. The first spectrograph module was delivered to Subaru in 2019, and the fourth module was delivered in late 2023, with delays due to both technical difficulties and scheduling challenges, including the impact of COVID-19 on the large PFS spectrograph system collaboration. The integration and validation of each spectrograph module were performed at the Laboratoire d’Astrophysique de Marseille (LAM) prior to delivery and full integration at the Subaru Telescope. First, we briefly review the opto-mechanical design and development strategy for the SpS. We present the integration and testing procedures developed for this mini-series of four spectrograph modules. Several specific AIT tools were innovative and key to the process, and are worth reporting, including the software tools required for functional tests, housekeeping, and environment monitoring during integration, analysis of dimensional metrology, test and verification of optical alignment, and overall performance assessment. Specific processes were also developed for analyzing and resolving anomalies and issues encountered. We detail the strategies developed to resolve technical issues: thermal and vacuum performance; dimensional and optical metrology processes to correct for focus/tilt anomalies observed at the focal plane; handling, alignment, and optical testing of large optics such as the 340x340x20mm Volume Phase Holographic Grating (VPHG). We briefly report on a grating orientation issue discovered before the delivery of the last module, which is reported elsewhere. We quickly report the integration logistics: managing the shipping process, custom, and deliveries of many parts and modules among partners since 2014, and the final delivery and installation at the Subaru Telescope at the summit of Mauna Kea in Hawai`i in 2019, 2022, and 2023. We then dedicate a full section to the optical and thermal performance for the largest 8m-class multi-object spectrograph: the spectral channels and camera alignment performance results and the detailed optical performance of the four spectrograph modules (extracted from internal extended performance reports).

Proceedings Article | 29 August 2022 Paper

Manufacturing and testing of the large lenses for the SDSS-V wide field corrector

Matthieu Gilles, Cédric Cammarata, Hélène Ducollet, Denis Fappani, Céline Lopez, Sylvain Perrin, Christian du Jeu, Bruno Delaborde, Patrick Robert, Julien Fourez, Stephen Smee, Robert Barkhouser, Aidan Gray

Proceedings Volume 12188, 121880M (2022) https://doi.org/10.1117/12.2627242

KEYWORDS: Lenses, Optics manufacturing, Optical coatings, Telescopes, Mirrors, Aspheric lenses, Spherical lenses, Polishing, Metrology

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Proceedings Article | 29 August 2022 Poster + Paper

Design of the new SDSS 2.5m telescope wide field corrector for SDSS-V

Robert Barkhouser, Stephen Smee, Randolph Hammond, Albert Harding, Aidan Gray, Solange Ramirez, Stefanie Wachter, Juna Kollmeier, John Downey, Jamey Eriksen, John Wilson

Proceedings Volume 12182, 121823O (2022) https://doi.org/10.1117/12.2630655

KEYWORDS: Tolerancing, Telescopes, Optical instrument design, Observatories, Zemax, Optomechanical design, Distortion, Optical design, Finite element methods, Spectroscopy

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Proceedings Article | 29 August 2022 Poster + Paper

Performance of the near-infrared camera for the Subaru Prime Focus Spectrograph

Stephen Smee, James Gunn, Robert Barkhouser, Josh Peebles, Craig Loomis, Kjetil Dohlen, Erin Kado-Fong, Jahmour Givans, Mirek Golebiowski, Aidan Gray, Randy Hammond, Stephen Hope, Robert Lupton, Yuki Moritani, Naoyuki Tamura

Proceedings Volume 12184, 121847L (2022) https://doi.org/10.1117/12.2630536

KEYWORDS: Cameras, Sensors, Near infrared, Spectrographs, Mirrors, Temperature metrology, Photons, Optical coatings, Image quality, Cryocoolers

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Proceedings Article | 29 August 2022 Poster + Paper

On-sky performance of the SDSS-V wide field corrector

Aidan Gray, Robert Barkhouser, Stephen Smee, Randy Hammond, Albert Harding, Solange Ramírez, Stefanie Wachter, Juna Kollmeier, Dmitry Bizyaev, Jamey Eriksen, Dylan Gatlin, Katie Grabowski, Karen Kinemuchi, Dan Long, Viktor Malanushenko, Fred Mrozek, Tracy Naugle, Audrey Oravetz, Daniel Oravetz, Kaike Pan, Ryan Wagner, John Wilson

Proceedings Volume 12184, 1218462 (2022) https://doi.org/10.1117/12.2630539

KEYWORDS: Telescopes, Optical filters, CCD cameras, Charge-coupled devices, Cameras, Image quality, Image filtering, Interfaces, Image processing, Control systems

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Proceedings Article | 29 August 2022 Presentation + Paper

Prime Focus Spectrograph (PFS) for the Subaru Telescope: its start of the last development phase

Naoyuki Tamura, Yuki Moritani, Kiyoto Yabe, Yuki Ishizuka, Yukiko Kamata, Ali Allaoui, Akira Arai, Stéphane Arnouts, Robert Barkhouser, Rudy Barette, Patrick Blanchard, Eddie Bergeron, Neven Caplar, Pierre-Yves Chabaud, Yin-Chang Chang, Hsin-Yo Chen, Chueh-Yi Chou, You-Hua Chu, Judith Cohen, Richardo da Costa, Thibaut Crauchet, Rodrigo de Almeida, Antonio de Oliveira, Ligia de Oliveira, Kjetil Dohlen, Leandro dos Santos, Richard Ellis, Maximilian Fabricius, Décio Ferreira, Hisanori Furusawa, Jahmour Givans, Javier Garciá-Carpio, Mirek Golebiowski, Aidan Gray, James Gunn, Satoshi Hamano, Randolph Hammond, Albert Harding, Kota Hayashi, Wanqiu He, Timothy Heckman, Stephen Hope, Shu-Fu Hsu, Yen-Shan Hu, Pin Jie Huang, Miho Ishigaki, Eric Jeschke, Yipeng Jing, Erin Kado-Fong, Jennifer Karr, Satoshi Kawanomoto, Masahiko Kimura, Michitaro Koike, Eiichiro Komatsu, Shintaro Koshida, Vincent Le Brun, Arnaud Le Fur, David Le Mignant, Romain Lhoussaine, Yen-Ting Lin, Hung-Hsu Ling, Craig Loomis, Robert Lupton, Fabrice Madec, Danilo Marchesini, Edouard Marguerite, Lucas Marrara, Dmitry Medvedev, Sogo Mineo, Satoshi Miyazaki, Takahiro Morishima, Kazumi Murata, Hitoshi Murayama, Graham Murray, Hirofumi Okita, Masato Onodera, Joshua Peebles, Paul Price, Tae-Soo Pyo, Lucio Ramos, Daniel Reiley, Martin Reinecke, Mitsuko Roberts, Josimar Rosa, Julien Rousselle, Mira Sarkis, Michael Seiffert, Kiaina Schubert, Hassan Siddiqui, Stephen Smee, Laerte Sodré, Michael Strauss, Christian Surace, Manuchehr Taghizadeh Popp, Philip Tait, Masahiro Takada, Yuhei Takagi, Masayuki Tanaka, Yoko Tanaka, Aniruddha Thakar, Didier Vibert, Shiang-Yu Wang, Chih-Yi Wen, Suzanne Werner, Matthew Wung, Gerald Lemson, Arik Mitschang, Naoki Yasuda, Hiroshige Yoshida, Chi-Hung Yan, Michitoshi Yoshida, Takuji Yamashita

Proceedings Volume 12184, 1218410 (2022) https://doi.org/10.1117/12.2628152

KEYWORDS: Telescopes, Cameras, Spectrographs, Optical fibers, Observatories, Sensors, Astronomy, Software development, Near infrared, Connectors

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Proceedings Article | 10 March 2021 Presentation + Paper

Prime Focus Spectrograph (PFS) for the Subaru telescope: a next-generation facility instrument of the Subaru telescope has started coming

Naoyuki Tamura, Naruhisa Takato, Yuki Moritani, Kiyoto Yabe, Yuki Ishizuka, Yukiko Kamata, Ali Allaoui, Stéphane Arnouts, Robert Barkhouser, Philippe Balard, Rudy Barette, Mohamed Belhadi, Jill Burnham, Neven Caplar, Michael Carr, Pierre-Yves Chabaud, Yin-Chang Chang, Hsin-Yo Chen, Richard Chou, You-Hua Chu, Judith Cohen, Ricardo Costa, Thibaut Crauchet, Rodrigo de Almeida, Antonio de Oliveira, Ligia de Oliveira, Kjetil Dohlen, Leandro dos Santos, Richard Ellis, Maximilian Fabricius, Décio Ferreira, Hisanori Furusawa, Javier Garcia-Carpio, Mirek Golebiowski, Aidan Gray, James Gunn, Albert Harding, Randolph Hammond, Murdock Hart, Timothy Heckman, Stephen Hope, Shu-Fu Hsu, Yen-Sang Hu, Pin-Jie Huang, Marc Jaquet, Eric Jeschke, Yipeng Jing, Erin Kado-Fong, Jennifer Karr, Satoshi Kawanomoto, Masahiko Kimura, Michitaro Koike, Eiichiro Komatsu, Shintaro Koshida, Vincent Le Brun, Olivier Le Fèvre, Arnaud Le Fur, David Le Mignant, Hung-Hsu Ling, Craig Loomis, Robert Lupton, Fabrice Madec, Danilo Marchesini, Edouard Marguerite, Lucas Marrara, Dmitry Medvedev, Sogo Mineo, Hitoshi Murayama, Graham Murray, Youichi Ohyama, Hirofumi Okita, Yuki Okura, Masato Onodera, Joseph Orndorff, Sandrine Pascal, Joshua Peebles, Lucio Ramos, Daniel Reiley, Martin Reinecke, Mitsuko Roberts, Josimar Rosa, Julien Rousselle, Mira Sarkis, Alain Schmitt, Michael Seiffert, Kiaina Schubert, Hassan Siddiqui, Stephen Smee, Laerte Sodré, Michael Strauss, Christian Surace, Manuchehr Taghizadeh-Popp, Philip Tait, Masahiro Takada, Satoshi Takita, Tomonori Tamura, Masayuki Tanaka, Yoko Tanaka, Aniruddha Thakar, Didier Vibert, Shiang-Yu Wang, Chih-Yi Wen, Suzanne Werner, Matthew Wung, Yoshihiko Yamada, Takuji Yamashita, Chi-Hung Yan, Naoki Yasuda, Hiroshige Yoshida, Michitoshi Yoshida

Proceedings Volume 11447, 1144713 (2021) https://doi.org/10.1117/12.2562206

KEYWORDS: Spectrographs, Telescopes, Cameras, Imaging systems, Multiplexing, Optical fibers, Hardware testing, Metrology, Observatories, Visible radiation

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Proceedings Article | 10 July 2018 Paper

Thermal reliability testing of digital micromirror devices (DMDs)

Gavin Hope, Devin Conley, Aidan Gray, Stephen Hope, Robert Barkhouser, Stephen Smee, Massimo Robberto

Proceedings Volume 10706, 107063T (2018) https://doi.org/10.1117/12.2314324

KEYWORDS: Digital micromirror devices, Mirrors, Cryogenics, Reliability, Astronomy, Cameras, Spectrographs, Infrared radiation, Sapphire, Video

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Proceedings Article | 10 July 2018 Paper

Scattered light testing of digital micromirror devices (DMDs)

Aidan Gray, Robert Barkhouser, Stephen Hope, Stephen Smee, Massimo Robberto

Proceedings Volume 10706, 107065T (2018) https://doi.org/10.1117/12.2314298

KEYWORDS: Digital micromirror devices, Mirrors, Light scattering, Sensors, Projection systems, Optical testing, Signal detection, Microscopes, Spectroscopes, Astronomy

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Proceedings Article | 22 February 2018 Paper

DMDs for multi-object near-infrared spectrographs in astronomy

Stephen Smee, Robert Barkhouser, Stephen Hope, Devin Conley, Aidan Gray, Gavin Hope, Massimo Robberto

Proceedings Volume 10546, 105460L (2018) https://doi.org/10.1117/12.2291184

KEYWORDS: Digital micromirror devices, Mirrors, Astronomy, Spectrographs, Imaging spectroscopy, Near infrared, Cryogenics, Astronomical imaging, Light scattering, Telescopes

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Showing 5 of 14 publications

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