Advanced

Instruments for a European Extremely Large Telescope: the challenges of designing instruments for 30- to 100-m telescopes

Russell, Adrian P.; Monnet, Guy; Quirrenbach, Andreas; Bacon, Roland; Redfern, Michael; Andersen, Torben LU ; Ardeberg, Arne LU ; Atad-Ettedgui, Eli and Hawarden, Timothy G. (2004) In Ground-based instrumentation for astronomy (Proceedings of the SPIE) 5492. p.1796-1809
Abstract
Designs for Extremely Large Telescopes (ELTs) are quite well advanced,but the requirements of instruments have had limited impact. Sinceprovision of a suitable environment for instruments is a critical aspectof all telescopes, we outline some well-known and some less-appreciatedchallenges of designing instruments for ELTs. A wide-field spectrometer(WFSPEC) with ~10 arcmin field-of-view, probably with AO correction ofground-layer seeing, illustrates the well-known difficulty of matchingmodern detector pixels to large (~0."3) images. The challenges ofexploiting wide-field (1'-2' FOV) high-performance AO systems on ELTsare illustrated by a Multi-Object Multi-field Spectrometer and Imager(MOMSI), which provides imaging and integral-field... (More)
Designs for Extremely Large Telescopes (ELTs) are quite well advanced,but the requirements of instruments have had limited impact. Sinceprovision of a suitable environment for instruments is a critical aspectof all telescopes, we outline some well-known and some less-appreciatedchallenges of designing instruments for ELTs. A wide-field spectrometer(WFSPEC) with ~10 arcmin field-of-view, probably with AO correction ofground-layer seeing, illustrates the well-known difficulty of matchingmodern detector pixels to large (~0."3) images. The challenges ofexploiting wide-field (1'-2' FOV) high-performance AO systems on ELTsare illustrated by a Multi-Object Multi-field Spectrometer and Imager(MOMSI), which provides imaging and integral-field spectroscopy, atnear-diffraction-limited pixel scales, of targets in approximately 300subfields each. This instrument, roughly equivalent to all theastronomical spectrometers yet built, extracts ~200 times less of theavailable information from the ELT's FOV than near-future instruments on8-m class telescopes will do for their hosts. We emphasise the greatsize of such instruments (40-100 tonnes, 100-200 m3) and the need toaccommodate this size in telescope plans. A third area of challenge isthe exploitation of the potential capabilities of ELTs in the mid-IR,where they would offer powerful complements to JWST and ALMA;low-emissivity telescope designs and, possibly, cryogenic AO, may beneeded. Finally, we outline the potential challenges of correctingatmospheric dispersion effects. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Ground-based instrumentation for astronomy (Proceedings of the SPIE)
editor
Moorwood, Alan F. M. and Iye, Masanori
volume
5492
pages
1796 - 1809
publisher
SPIE
external identifiers
  • Scopus:10444282095
ISBN
0-8194-5424-9
DOI
10.1117/12.551473
language
English
LU publication?
yes
id
f904cee4-902e-4d8c-b162-d56f2fb1b2a9 (old id 528468)
date added to LUP
2007-09-25 09:19:17
date last changed
2016-10-13 04:46:53
@misc{f904cee4-902e-4d8c-b162-d56f2fb1b2a9,
  abstract     = {Designs for Extremely Large Telescopes (ELTs) are quite well advanced,but the requirements of instruments have had limited impact. Sinceprovision of a suitable environment for instruments is a critical aspectof all telescopes, we outline some well-known and some less-appreciatedchallenges of designing instruments for ELTs. A wide-field spectrometer(WFSPEC) with ~10 arcmin field-of-view, probably with AO correction ofground-layer seeing, illustrates the well-known difficulty of matchingmodern detector pixels to large (~0."3) images. The challenges ofexploiting wide-field (1'-2' FOV) high-performance AO systems on ELTsare illustrated by a Multi-Object Multi-field Spectrometer and Imager(MOMSI), which provides imaging and integral-field spectroscopy, atnear-diffraction-limited pixel scales, of targets in approximately 300subfields each. This instrument, roughly equivalent to all theastronomical spectrometers yet built, extracts ~200 times less of theavailable information from the ELT's FOV than near-future instruments on8-m class telescopes will do for their hosts. We emphasise the greatsize of such instruments (40-100 tonnes, 100-200 m3) and the need toaccommodate this size in telescope plans. A third area of challenge isthe exploitation of the potential capabilities of ELTs in the mid-IR,where they would offer powerful complements to JWST and ALMA;low-emissivity telescope designs and, possibly, cryogenic AO, may beneeded. Finally, we outline the potential challenges of correctingatmospheric dispersion effects.},
  author       = {Russell, Adrian P. and Monnet, Guy and Quirrenbach, Andreas and Bacon, Roland and Redfern, Michael and Andersen, Torben and Ardeberg, Arne and Atad-Ettedgui, Eli and Hawarden, Timothy G.},
  editor       = {Moorwood, Alan F. M. and Iye, Masanori},
  isbn         = {0-8194-5424-9},
  language     = {eng},
  pages        = {1796--1809},
  publisher    = {ARRAY(0x7f8ad18)},
  series       = {Ground-based instrumentation for astronomy (Proceedings of the SPIE)},
  title        = {Instruments for a European Extremely Large Telescope: the challenges of designing instruments for 30- to 100-m telescopes},
  url          = {http://dx.doi.org/10.1117/12.551473},
  volume       = {5492},
  year         = {2004},
}