1 / 3

C ompact Stirling cooling of astronomical detectors

C ompact Stirling cooling of astronomical detectors. Gert Raskin , Johan Morren , Wim Pessemier , Jeroen Vandersteen , Jesus Perez Padilla Institute of Astronomy, KU Leuven University , Belgium Mercator Telescope , La Palma, Spain. MAIA: Mercator Advanced Imager for Asteroseismology

ulf
Download Presentation

C ompact Stirling cooling of astronomical detectors

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Compact Stirling cooling of astronomical detectors Gert Raskin, Johan Morren, WimPessemier, JeroenVandersteen, Jesus Perez PadillaInstitute of Astronomy, KU Leuven University, BelgiumMercator Telescope, La Palma, Spain • MAIA: Mercator Advanced Imager for Asteroseismology • 3-Channel imager: U G R bands • 3 2kx6k FT CCDs (CCD42-C0, e2v) • CCDs cooled to 165K by free-piston Stirling coolers: + + : Compact, low power, simple to use, (long lifetime) – – : Vibrations (linear cooling engine at 60 Hz) Mercator Telescope Institute of Astronomy MAIA FoV: 9.4’ x 14.1’ 400 – 550 nm G camera 575 – 700 nmR camera Collimator Guiding camera λ > 875 nm U camera330 – 400 nm

  2. Compact Stirling cooling of astronomical detectors Gert Raskin, Johan Morren, WimPessemier, JeroenVandersteen, Jesus Perez PadillaInstitute of Astronomy, KU Leuven University, BelgiumMercator Telescope, La Palma, Spain Vibrations: < 10 arcsecPtP • MAIA: Mercator Advanced Imager for Asteroseismology • 3-Channel imager: U G R bands • 3 2kx6k FT CCDs (CCD42-C0, e2v) • CCDs cooled to 165K by free-piston Stirling coolers: + + : Compact, low power, simple to use, (long lifetime) – – : Vibrations (linear cooling engine at 60 Hz) 5W lift @ 77K with80W input power 243 mm total length2.2 kg total mass CryoTel MT cooler Mercator Telescope Institute of Astronomy MAIA FoV: 9.4’ x 14.1’

  3. Poster R14 Filter out cryo-cooler vibrations • Stirling cooler mounted on 4 leaf springs • No damping • Spring-mass system: mechanical low-passfilter (10 Hz) • 60 Hz + harmonics strongly attenuated • Vibration reduction: ÷ 500 @ 60 Hz • Coolers have no longer any effect on image quality Mercator Telescope Institute of Astronomy

More Related