PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
Telescopes suffer from radiative subcooling against the night sky (“low-wind effect”), depending on wind speed, sky exposure and the emissivity of the surface finish. Critical structural elements in the ELT are the spider vanes, the vertical trusses in the telescope tube and the M4 Tower.
We present an improved sky temperature model and 3D computational fluid dynamics simulations of the airflow inside the ELT dome with local temperatures and derive the wavefront error map in the pupil from it, using ray tracing. We discuss the optimal shape that M4 can achieve to correct the errors and report the wavefront residuals.
Ronald Holzlöhner andMartin Brinkmann
"Mitigating wavefront error caused by sky subcooling of the ELT structure", Proc. SPIE 11445, Ground-based and Airborne Telescopes VIII, 114450Y (13 December 2020); https://doi.org/10.1117/12.2563285
ACCESS THE FULL ARTICLE
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
The alert did not successfully save. Please try again later.
Ronald Holzlöhner, Martin Brinkmann, "Mitigating wavefront error caused by sky subcooling of the ELT structure," Proc. SPIE 11445, Ground-based and Airborne Telescopes VIII, 114450Y (13 December 2020); https://doi.org/10.1117/12.2563285