GPI 2.0: exploring the impact of different readout modes on the wavefront sensor's EMCCD

Clarissa R. Do Ó; Saavidra Perera; Jérôme Maire; Jayke S. Nguyen; Vincent Chambouleyron; Quinn M. Konopacky; Jeffrey Chilcote; Joeleff Fitzsimmons; Randall Hamper; Dan Kerley; Bruce Macintosh; Christian Marois; Friedrik Rantakyrö; Dmitry Savransky; Jean-Pierre Veran; Guido Agapito; S. Mark Ammons; Marco Bonaglia; Marc-Andre Boucher; Jennifer Dunn; Simone Esposito; Guillaume Filion; Jean Thomas Landry; Olivier Lardiere; Duan Li; Alex Madurowicz; Dillon Peng; Lisa Poyneer; Eckhart Spalding

doi:10.1117/12.3019439

27 August 2024 GPI 2.0: exploring the impact of different readout modes on the wavefront sensor's EMCCD

Clarissa R. Do Ó, Saavidra Perera, Jérôme Maire, Jayke S. Nguyen, Vincent Chambouleyron, Quinn M. Konopacky, Jeffrey Chilcote, Joeleff Fitzsimmons, Randall Hamper, Dan Kerley, Bruce Macintosh, Christian Marois, Friedrik Rantakyrö, Dmitry Savransky, Jean-Pierre Veran, Guido Agapito, S. Mark Ammons, Marco Bonaglia, Marc-Andre Boucher, Jennifer Dunn, Simone Esposito, Guillaume Filion, Jean Thomas Landry, Olivier Lardiere, Duan Li, Alex Madurowicz, Dillon Peng, Lisa Poyneer, Eckhart Spalding

Author Affiliations +

Proceedings Volume 13097, Adaptive Optics Systems IX; 1309742 (2024) https://doi.org/10.1117/12.3019439
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

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.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Clarissa R. Do Ó, Saavidra Perera, Jérôme Maire, Jayke S. Nguyen, Vincent Chambouleyron, Quinn M. Konopacky, Jeffrey Chilcote, Joeleff Fitzsimmons, Randall Hamper, Dan Kerley, Bruce Macintosh, Christian Marois, Friedrik Rantakyrö, Dmitry Savransky, Jean-Pierre Veran, Guido Agapito, S. Mark Ammons, Marco Bonaglia, Marc-Andre Boucher, Jennifer Dunn, Simone Esposito, Guillaume Filion, Jean Thomas Landry, Olivier Lardiere, Duan Li, Alex Madurowicz, Dillon Peng, Lisa Poyneer, and Eckhart Spalding "GPI 2.0: exploring the impact of different readout modes on the wavefront sensor's EMCCD", Proc. SPIE 13097, Adaptive Optics Systems IX, 1309742 (27 August 2024); https://doi.org/10.1117/12.3019439

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available