Adaptive optics for the Euro50: design and performance

Alexander Gontcharov, Mette Owner-Petersen, Torben Andersen, Jacques M. Beckers, Nicholas Devaney

Forskningsoutput: Kapitel i bok/rapport/Conference proceedingKonferenspaper i proceedingPeer review

20 Citeringar (SciVal)

Sammanfattning

The optical design for the proposed Euro50 extremely large telescopewith integrated adaptive optics (AO) is presented. For atmosphericturbulence correction, we propose using single and dual-conjugate AOsystems working with natural and laser guide stars. The corrective shapeof the deformable mirrors (DMs) is derived from an analytical algorithmbased on minimization of the sum of the residual power spectra of thephase fluctuations seen by guide stars after correction. Predictions forperformance of the Euro50 ELT with Dual-conjugate AO are given for the Kband using a seven layer atmospheric model for the atmosphere at theObservatorio del Roque de los Muchachos (ORM) on La Palma. The averageStrehl ratio is used to quantify the system performance for differentvalues of actuator pitch and DM conjugation altitudes. The influence ofthe outer scale and telescope pointing on the RMS stroke of the DMs ispresented. It is concluded that construction of such a system isfeasible and that there is a need for development of a simulation toolto verify the analytical calculations. Precise knowledge of the outerscale of the atmosphere at the ORM is needed to establish the dynamicalrange of the mirrors.
Originalspråkengelska
Titel på värdpublikationFuture Giant Telescopes. Proceedings of the SPIE
RedaktörerJ. Roger P Angel, Roberto Gilmozzi
FörlagSPIE
Sidor36-46
Volym4840
ISBN (tryckt)081944619X
DOI
StatusPublished - 2003
EvenemangConference on Future Giant Telescopes - Waikoloa, HI, USA
Varaktighet: 2002 aug. 262002 aug. 28

Publikationsserier

Namn
Volym4840

Konferens

KonferensConference on Future Giant Telescopes
Land/TerritoriumUSA
OrtWaikoloa, HI
Period2002/08/262002/08/28

Ämnesklassifikation (UKÄ)

  • Astronomi, astrofysik och kosmologi

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