A new slow focus sensor for GeMS

Eduardo Marin; Vincent Garrel; Gaetano Sivo; Vanessa Montes; Chadwick Trujillo; William Rambold; Pedro Gigoux; Cristian Moreno; Ramon Galvez; Gaston Gausachs; Matthieu Barreau

doi:10.20353/K3T4CP1131578

A new slow focus sensor for GeMS

Eduardo Marin, Vincent Garrel, Gaetano Sivo, Vanessa Montes, Chadwick Trujillo, William Rambold, Pedro Gigoux, Cristian Moreno, Ramon Galvez, Gaston Gausachs, Matthieu Barreau

Research output: Contribution to conference › Paper › peer-review

1 Scopus citations

Abstract

The Gemini South 8-meter telescope's Multi Conjugate Adaptive Optics System GeMS is about to enter a new era of science with an entire new upgrade for its Natural Guide Star wave front sensor (NGS2). With NGS2 the limiting magnitude of the natural guide stars used for tip/tilt sensing is expected to increase from its current limit of 15.4 to 17+ in R-band. This will provide a much greater sky coverage over the current system. NGS2 is a complete replacement of the current Natural Guide Star wave front sensor (NGS). This presents an interesting challenge as the current NGS includes a Slow Focus Sensor (SFS) used to compensate for the sodium layer mean altitude variations. With the new NGS2 setup, this SFS will be removed and a suitable replacement must be found. Within the Gemini environment there exist two facility wave front sensors, Peripheral Wave Front Sensors one and two (PWFS1 and PWFS2), that could act as an SFS. Only one of these (PWFS1) is located optically in front of the GeMS Adaptive Optics (AO) bench (Canopus). We are currently preparing this wave front sensor as the new SFS for GeMS under the NGS2 setup. The results of several nighttime and daytime tests show that PWFS1 will be an adequate SFS for GeMS in the NGS2 setup providing excellent sky coverage without compromising the GeMS Field of View (FoV).

Original language	English (US)
DOIs	https://doi.org/10.20353/K3T4CP1131578
State	Published - 2015
Externally published	Yes
Event	4th Adaptive Optics for Extremely Large Telescopes, AO4ELT 2015 - Lake Arrowhead, United States Duration: Oct 26 2015 → Oct 30 2015

Conference

Conference	4th Adaptive Optics for Extremely Large Telescopes, AO4ELT 2015
Country/Territory	United States
City	Lake Arrowhead
Period	10/26/15 → 10/30/15

Keywords

AO
LGS
MCAO

ASJC Scopus subject areas

Control and Systems Engineering
Instrumentation
Electronic, Optical and Magnetic Materials
Space and Planetary Science
Astronomy and Astrophysics
Mechanical Engineering

Access to Document

10.20353/K3T4CP1131578

Cite this

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title = "A new slow focus sensor for GeMS",

abstract = "The Gemini South 8-meter telescope's Multi Conjugate Adaptive Optics System GeMS is about to enter a new era of science with an entire new upgrade for its Natural Guide Star wave front sensor (NGS2). With NGS2 the limiting magnitude of the natural guide stars used for tip/tilt sensing is expected to increase from its current limit of 15.4 to 17+ in R-band. This will provide a much greater sky coverage over the current system. NGS2 is a complete replacement of the current Natural Guide Star wave front sensor (NGS). This presents an interesting challenge as the current NGS includes a Slow Focus Sensor (SFS) used to compensate for the sodium layer mean altitude variations. With the new NGS2 setup, this SFS will be removed and a suitable replacement must be found. Within the Gemini environment there exist two facility wave front sensors, Peripheral Wave Front Sensors one and two (PWFS1 and PWFS2), that could act as an SFS. Only one of these (PWFS1) is located optically in front of the GeMS Adaptive Optics (AO) bench (Canopus). We are currently preparing this wave front sensor as the new SFS for GeMS under the NGS2 setup. The results of several nighttime and daytime tests show that PWFS1 will be an adequate SFS for GeMS in the NGS2 setup providing excellent sky coverage without compromising the GeMS Field of View (FoV).",

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author = "Eduardo Marin and Vincent Garrel and Gaetano Sivo and Vanessa Montes and Chadwick Trujillo and William Rambold and Pedro Gigoux and Cristian Moreno and Ramon Galvez and Gaston Gausachs and Matthieu Barreau",

year = "2015",

doi = "10.20353/K3T4CP1131578",

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T1 - A new slow focus sensor for GeMS

AU - Marin, Eduardo

AU - Garrel, Vincent

AU - Sivo, Gaetano

AU - Montes, Vanessa

AU - Trujillo, Chadwick

AU - Rambold, William

AU - Gigoux, Pedro

AU - Moreno, Cristian

AU - Galvez, Ramon

AU - Gausachs, Gaston

AU - Barreau, Matthieu

PY - 2015

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N2 - The Gemini South 8-meter telescope's Multi Conjugate Adaptive Optics System GeMS is about to enter a new era of science with an entire new upgrade for its Natural Guide Star wave front sensor (NGS2). With NGS2 the limiting magnitude of the natural guide stars used for tip/tilt sensing is expected to increase from its current limit of 15.4 to 17+ in R-band. This will provide a much greater sky coverage over the current system. NGS2 is a complete replacement of the current Natural Guide Star wave front sensor (NGS). This presents an interesting challenge as the current NGS includes a Slow Focus Sensor (SFS) used to compensate for the sodium layer mean altitude variations. With the new NGS2 setup, this SFS will be removed and a suitable replacement must be found. Within the Gemini environment there exist two facility wave front sensors, Peripheral Wave Front Sensors one and two (PWFS1 and PWFS2), that could act as an SFS. Only one of these (PWFS1) is located optically in front of the GeMS Adaptive Optics (AO) bench (Canopus). We are currently preparing this wave front sensor as the new SFS for GeMS under the NGS2 setup. The results of several nighttime and daytime tests show that PWFS1 will be an adequate SFS for GeMS in the NGS2 setup providing excellent sky coverage without compromising the GeMS Field of View (FoV).

AB - The Gemini South 8-meter telescope's Multi Conjugate Adaptive Optics System GeMS is about to enter a new era of science with an entire new upgrade for its Natural Guide Star wave front sensor (NGS2). With NGS2 the limiting magnitude of the natural guide stars used for tip/tilt sensing is expected to increase from its current limit of 15.4 to 17+ in R-band. This will provide a much greater sky coverage over the current system. NGS2 is a complete replacement of the current Natural Guide Star wave front sensor (NGS). This presents an interesting challenge as the current NGS includes a Slow Focus Sensor (SFS) used to compensate for the sodium layer mean altitude variations. With the new NGS2 setup, this SFS will be removed and a suitable replacement must be found. Within the Gemini environment there exist two facility wave front sensors, Peripheral Wave Front Sensors one and two (PWFS1 and PWFS2), that could act as an SFS. Only one of these (PWFS1) is located optically in front of the GeMS Adaptive Optics (AO) bench (Canopus). We are currently preparing this wave front sensor as the new SFS for GeMS under the NGS2 setup. The results of several nighttime and daytime tests show that PWFS1 will be an adequate SFS for GeMS in the NGS2 setup providing excellent sky coverage without compromising the GeMS Field of View (FoV).

KW - AO

KW - LGS

KW - MCAO

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Y2 - 26 October 2015 through 30 October 2015

ER -

A new slow focus sensor for GeMS

Abstract

Conference

Keywords

ASJC Scopus subject areas

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