Search: onr:"swepub:oai:DiVA.org:kth-202900" >
A new slow focus se...
A new slow focus sensor for GeMS
-
Marin, E. (author)
-
Garrel, V. (author)
-
Sivo, G. (author)
-
show more...
-
Montes, V. (author)
-
Trujillo, C. (author)
-
Rambold, W. (author)
-
Gigoux, P. (author)
-
Moreno, C. (author)
-
Galvez, R. (author)
-
Gausachs, G. (author)
-
- Barreau, Matthieu (author)
- KTH,Gemini Observatory, Chile
-
show less...
-
(creator_code:org_t)
- University of California Center for Adaptive Optics, 2015
- 2015
- English.
-
In: Adaptive Optics for Extremely Large Telescopes 4 - Conference Proceedings. - : University of California Center for Adaptive Optics.
- Related links:
-
https://urn.kb.se/re...
-
show more...
-
https://doi.org/10.2...
-
show less...
Abstract
Subject headings
Close
- 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).
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- AO
- LGS
- MCAO
- Gems
- Natural gems
- Optical telescopes
- Stars
- Telescopes
- Wavefronts
- Altitude variation
- Current limits
- Field of views
- Focus sensors
- Multi-conjugate adaptive optics systems
- Natural guide star
- Wave front sensors
- Adaptive optics
Publication and Content Type
- ref (subject category)
- kon (subject category)
To the university's database
- By the author/editor
-
Marin, E.
-
Garrel, V.
-
Sivo, G.
-
Montes, V.
-
Trujillo, C.
-
Rambold, W.
-
show more...
-
Gigoux, P.
-
Moreno, C.
-
Galvez, R.
-
Gausachs, G.
-
Barreau, Matthie ...
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Astronomy Astrop ...
- Articles in the publication
- Adaptive Optics ...
- By the university
-
Royal Institute of Technology