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Status of the Euro50 project

Andersen, Torben LU ; Ardeberg, Arne LU ; Riewaldt, Holger LU ; Lastiwka, M.; Quinlan, N.; McNamara, K.; Wang, Xin; Enmark, Anita LU ; Owner-Petersen, Mette LU and Shearer, A, et al. (2004) Ground-Based Telescopes In Proceedings of the SPIE - The International Society for Optical Engineering 5489(1). p.407-416
Abstract
The Euro50 is an extremely large telescope for optical and infrared wavelength with a 50 m primary mirror. It has a segmented, aspherical primary mirror and an aspherical, deformable secondary in a Gregorian layout. A tentative conceptual design exists and has been documented in a study report. Recent activities have concentrated on the science case for extremely large telescopes in the 50 m class and on identification of potential technical "show stoppers". The science case investigation has identified four fields of particular interest. The studies of critical technical issues have concentrated on atmospheric dispersion effects for high-resolution adaptive optics for extremely large telescopes, and on the influence of wind and other... (More)
The Euro50 is an extremely large telescope for optical and infrared wavelength with a 50 m primary mirror. It has a segmented, aspherical primary mirror and an aspherical, deformable secondary in a Gregorian layout. A tentative conceptual design exists and has been documented in a study report. Recent activities have concentrated on the science case for extremely large telescopes in the 50 m class and on identification of potential technical "show stoppers". The science case investigation has identified four fields of particular interest. The studies of critical technical issues have concentrated on atmospheric dispersion effects for high-resolution adaptive optics for extremely large telescopes, and on the influence of wind and other disturbances on wavefront control. Wind load on the telescope, the primary mirror and the enclosure has been studied using wind tunnel measurements and computational fluid dynamics. The impact of wind on the total system has been investigated using an integrated model that includes the telescope structure, the primary mirror segment alignment system, the secondary mirror alignment system, and single conjugate adaptive optics using the deformable secondary mirror. The first, tentative results show that wind disturbances may be significant and that the task of correcting for wind residuals may be at least as large for the adaptive optics system as that of correcting for atmospheric aberrations. The results suggest that use of extremely large telescopes for observations of earth-like planets around nearby stars may imply a considerable challenge (Less)
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type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
segmented aspherical primary mirror, atmospheric dispersion effects, wavefront control, high-resolution adaptive optics, wind tunnel measurements, wind load, computational fluid dynamics, primary mirror segment alignment system, 50 m, secondary mirror alignment system, deformable secondary mirror, exoplanet detection, integrated modeling, Euro50, Extremely Large Telescopes
in
Proceedings of the SPIE - The International Society for Optical Engineering
volume
5489
issue
1
pages
407 - 416
publisher
SPIE
conference name
Ground-Based Telescopes
external identifiers
  • wos:000224524300041
  • scopus:10444236440
ISSN
0277-786X
1996-756X
DOI
10.1117/12.551467
language
English
LU publication?
yes
id
97bdebd8-5c5e-4385-b037-744408680022 (old id 614541)
date added to LUP
2007-11-27 09:48:22
date last changed
2017-11-20 15:05:58
@inproceedings{97bdebd8-5c5e-4385-b037-744408680022,
  abstract     = {The Euro50 is an extremely large telescope for optical and infrared wavelength with a 50 m primary mirror. It has a segmented, aspherical primary mirror and an aspherical, deformable secondary in a Gregorian layout. A tentative conceptual design exists and has been documented in a study report. Recent activities have concentrated on the science case for extremely large telescopes in the 50 m class and on identification of potential technical "show stoppers". The science case investigation has identified four fields of particular interest. The studies of critical technical issues have concentrated on atmospheric dispersion effects for high-resolution adaptive optics for extremely large telescopes, and on the influence of wind and other disturbances on wavefront control. Wind load on the telescope, the primary mirror and the enclosure has been studied using wind tunnel measurements and computational fluid dynamics. The impact of wind on the total system has been investigated using an integrated model that includes the telescope structure, the primary mirror segment alignment system, the secondary mirror alignment system, and single conjugate adaptive optics using the deformable secondary mirror. The first, tentative results show that wind disturbances may be significant and that the task of correcting for wind residuals may be at least as large for the adaptive optics system as that of correcting for atmospheric aberrations. The results suggest that use of extremely large telescopes for observations of earth-like planets around nearby stars may imply a considerable challenge},
  author       = {Andersen, Torben and Ardeberg, Arne and Riewaldt, Holger and Lastiwka, M. and Quinlan, N. and McNamara, K. and Wang, Xin and Enmark, Anita and Owner-Petersen, Mette and Shearer, A and Fan, Chengyu and Moraru, Dan},
  booktitle    = {Proceedings of the SPIE - The International Society for Optical Engineering},
  issn         = {0277-786X},
  keyword      = {segmented aspherical primary mirror,atmospheric dispersion effects,wavefront control,high-resolution adaptive optics,wind tunnel measurements,wind load,computational fluid dynamics,primary mirror segment alignment system,50 m,secondary mirror alignment system,deformable secondary mirror,exoplanet detection,integrated modeling,Euro50,Extremely Large Telescopes},
  language     = {eng},
  number       = {1},
  pages        = {407--416},
  publisher    = {SPIE},
  title        = {Status of the Euro50 project},
  url          = {http://dx.doi.org/10.1117/12.551467},
  volume       = {5489},
  year         = {2004},
}