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| Formato: | Preprint |
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2024
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2410.01960 |
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| author | Ó, Clarissa R. Do Perera, Saavidra Maire, Jérôme Nguyen, Jayke S. Chambouleyron, Vincent Konopacky, Quinn M. Chilcote, Jeffrey Fitzsimmons, Joeleff Hamper, Randall Kerley, Dan Macintosh, Bruce Marois, Christian Rantakyrö, Fredrik Savranksy, Dmitry Veran, Jean-Pierre Agapito, Guido Ammons, S. Mark Bonaglia, Marco Boucher, Marc-Andre Dunn, Jennifer Esposito, Simone Filion, Guillaume Landry, Jean Thomas Lardiere, Olivier Li, Duan Madurowicz, Alex Peng, Dillon Poyneer, Lisa Spalding, Eckhart |
| author_facet | Ó, Clarissa R. Do Perera, Saavidra Maire, Jérôme Nguyen, Jayke S. Chambouleyron, Vincent Konopacky, Quinn M. Chilcote, Jeffrey Fitzsimmons, Joeleff Hamper, Randall Kerley, Dan Macintosh, Bruce Marois, Christian Rantakyrö, Fredrik Savranksy, Dmitry Veran, Jean-Pierre Agapito, Guido Ammons, S. Mark Bonaglia, Marco Boucher, Marc-Andre Dunn, Jennifer Esposito, Simone Filion, Guillaume Landry, Jean Thomas Lardiere, Olivier Li, Duan Madurowicz, Alex Peng, Dillon Poyneer, Lisa Spalding, Eckhart |
| contents | The Gemini Planet Imager (GPI) is a high contrast imaging instrument that aims to detect and characterize extrasolar planets. GPI is being upgraded to GPI 2.0, with several subsystems receiving a re-design to improve its contrast. To enable observations on fainter targets and increase performance on brighter ones, one of the upgrades is to the adaptive optics system. The current Shack-Hartmann wavefront sensor (WFS) is being replaced by a pyramid WFS with an low-noise electron multiplying CCD (EMCCD). EMCCDs are detectors capable of counting single photon events at high speed and high sensitivity. In this work, we characterize the performance of the HNü 240 EMCCD from Nüvü Cameras, which was custom-built for GPI 2.0. Through our performance evaluation we found that the operating mode of the camera had to be changed from inverted-mode (IMO) to non-inverted mode (NIMO) in order to improve charge diffusion features found in the detector's images. Here, we characterize the EMCCD's noise contributors (readout noise, clock-induced charges, dark current) and linearity tests (EM gain, exposure time) before and after the switch to NIMO. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_01960 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | GPI 2.0: Exploring The Impact of Different Readout Modes on the Wavefront Sensor's EMCCD Ó, Clarissa R. Do Perera, Saavidra Maire, Jérôme Nguyen, Jayke S. Chambouleyron, Vincent Konopacky, Quinn M. Chilcote, Jeffrey Fitzsimmons, Joeleff Hamper, Randall Kerley, Dan Macintosh, Bruce Marois, Christian Rantakyrö, Fredrik Savranksy, Dmitry Veran, Jean-Pierre Agapito, Guido Ammons, S. Mark Bonaglia, Marco Boucher, Marc-Andre Dunn, Jennifer Esposito, Simone Filion, Guillaume Landry, Jean Thomas Lardiere, Olivier Li, Duan Madurowicz, Alex Peng, Dillon Poyneer, Lisa Spalding, Eckhart Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics The Gemini Planet Imager (GPI) is a high contrast imaging instrument that aims to detect and characterize extrasolar planets. GPI is being upgraded to GPI 2.0, with several subsystems receiving a re-design to improve its contrast. To enable observations on fainter targets and increase performance on brighter ones, one of the upgrades is to the adaptive optics system. The current Shack-Hartmann wavefront sensor (WFS) is being replaced by a pyramid WFS with an low-noise electron multiplying CCD (EMCCD). EMCCDs are detectors capable of counting single photon events at high speed and high sensitivity. In this work, we characterize the performance of the HNü 240 EMCCD from Nüvü Cameras, which was custom-built for GPI 2.0. Through our performance evaluation we found that the operating mode of the camera had to be changed from inverted-mode (IMO) to non-inverted mode (NIMO) in order to improve charge diffusion features found in the detector's images. Here, we characterize the EMCCD's noise contributors (readout noise, clock-induced charges, dark current) and linearity tests (EM gain, exposure time) before and after the switch to NIMO. |
| title | GPI 2.0: Exploring The Impact of Different Readout Modes on the Wavefront Sensor's EMCCD |
| topic | Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2410.01960 |