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Modeling ELTs at different wavelengths

Enmark, Anita LU and Andersen, Torben LU (2008) Extremely Large Telescopes: Which Wavelengths? Retirement Symposium for Arne Ardeberg In Extremely Large Telescopes: Which Wavelengths? Retirement Symposium for Arne Ardeberg 6986. p.9860-9860
Abstract
The next generation of telescopes, the Extremely Large Telescopes (ELTs), will have a multitude Of control loops to maintain nearly diffraction-limited performance in the presence of atmospheric turbulence and external disturbances, for instance from wind. Integrated simulation models combining structural and optical modeling together with control system modeling are efficient tools for prediction of performance of ELTs. Such models include submodels of structures, adaptive optics, atmosphere, wind load, deformable mirrors and a segmented primary mirror. So far the models applied have been applicable to observations in the K-band. However, there is a desire to also operate the ELTs with adaptive optics at wavelengths in the visible range.... (More)
The next generation of telescopes, the Extremely Large Telescopes (ELTs), will have a multitude Of control loops to maintain nearly diffraction-limited performance in the presence of atmospheric turbulence and external disturbances, for instance from wind. Integrated simulation models combining structural and optical modeling together with control system modeling are efficient tools for prediction of performance of ELTs. Such models include submodels of structures, adaptive optics, atmosphere, wind load, deformable mirrors and a segmented primary mirror. So far the models applied have been applicable to observations in the K-band. However, there is a desire to also operate the ELTs with adaptive optics at wavelengths in the visible range. We here give estimates of the feasibility of performing such simulations. We set up scaling laws for the design parameters as a function of wavelength of operation and we show that the execution time for an integrated model of an ELT depends dramatically on the operation wavelength. We also discuss the consequences of different choices of model refinement. Finally we present estimates of the execution time for integrated models of ELTs. We show that accurate modeling in the K-band calls for long execution times, even with parallel computers. For wavelengths in the visible range, only the very simplest models are feasible due to execution time limitations, thereby precluding many interesting studies related to noise sensitivity and limiting magnitude for guide stars. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Extremely Large Telescopes: Which Wavelengths? Retirement Symposium for Arne Ardeberg
editor
Andersen, Torben and
volume
6986
pages
9860 - 9860
publisher
SPIE
conference name
Extremely Large Telescopes: Which Wavelengths? Retirement Symposium for Arne Ardeberg
external identifiers
  • wos:000258065600018
  • scopus:43549125015
ISSN
1996-756X
0277-786X
DOI
10.1117/12.801277
language
English
LU publication?
yes
id
b00779cb-6ff9-4df2-9030-d963ab2b0215 (old id 1278634)
date added to LUP
2009-01-19 16:03:20
date last changed
2017-01-01 05:10:39
@inproceedings{b00779cb-6ff9-4df2-9030-d963ab2b0215,
  abstract     = {The next generation of telescopes, the Extremely Large Telescopes (ELTs), will have a multitude Of control loops to maintain nearly diffraction-limited performance in the presence of atmospheric turbulence and external disturbances, for instance from wind. Integrated simulation models combining structural and optical modeling together with control system modeling are efficient tools for prediction of performance of ELTs. Such models include submodels of structures, adaptive optics, atmosphere, wind load, deformable mirrors and a segmented primary mirror. So far the models applied have been applicable to observations in the K-band. However, there is a desire to also operate the ELTs with adaptive optics at wavelengths in the visible range. We here give estimates of the feasibility of performing such simulations. We set up scaling laws for the design parameters as a function of wavelength of operation and we show that the execution time for an integrated model of an ELT depends dramatically on the operation wavelength. We also discuss the consequences of different choices of model refinement. Finally we present estimates of the execution time for integrated models of ELTs. We show that accurate modeling in the K-band calls for long execution times, even with parallel computers. For wavelengths in the visible range, only the very simplest models are feasible due to execution time limitations, thereby precluding many interesting studies related to noise sensitivity and limiting magnitude for guide stars.},
  author       = {Enmark, Anita and Andersen, Torben},
  booktitle    = {Extremely Large Telescopes: Which Wavelengths? Retirement Symposium for Arne Ardeberg},
  editor       = {Andersen, Torben},
  issn         = {1996-756X},
  language     = {eng},
  pages        = {9860--9860},
  publisher    = {SPIE},
  title        = {Modeling ELTs at different wavelengths},
  url          = {http://dx.doi.org/10.1117/12.801277},
  volume       = {6986},
  year         = {2008},
}