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Requirements on array detectors from the OWL Instrument Concept Studies Sandro D’Odorico

Requirements on array detectors from the OWL Instrument Concept Studies Sandro D’Odorico European Southern Observatory. SDW 2005 TAORMINA. OWL INSTRUMENT CONCEPT STUDIES Framework, Scope, Status.

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Requirements on array detectors from the OWL Instrument Concept Studies Sandro D’Odorico

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  1. Requirements on array detectors from the OWL Instrument Concept Studies Sandro D’Odorico European Southern Observatory SDW 2005 TAORMINA

  2. OWL INSTRUMENT CONCEPT STUDIES Framework, Scope, Status • 8 Instrument Studies were launched in 2004 by ESO in the framework of the 100m OWL Concept Study, • The present set of instruments cover the spectral range from the blue to sub-mm with different scientific field of views and image quality requirements • The scope of the studies is: • to support the OWL science cases • to verify with actual instrument concepts interfaces and operation scheme of the telescope design • to check feasibility of instrument concepts and identify needs and required R&D for the different subsystems The Instrument Concept Study final Reports are due in September-October 2005. This advanced overview of the detectors requirements is based on the work in progress. Thanks to the P.I.s! SDW _ 20.6.2005_S.D’Odorico/ 2

  3. OWL Instrument Concept Studies (status June2005) SDW 2005 _ 20.6.2005_S.D’Odorico/ 3

  4. Cosmic Dynamics EXperiment Concept Study carried out by ESO, Cambridge, Geneve and INAF Oss. Trieste Portion of the Ly  forest at z=3 Main Goal A direct measurement of the cosmic acceleration Obtained by comparing high resolution spectra of the Ly  forest and metal systems in the direction of bright QSOs over a large time interval (10 years or more) Simulation of the difference between 2 epochs SDW 2005 _ 20.6.2005_S.D’Odorico/ 4

  5. Cosmic Dynamics EXperiment Concept Study carried out by ESO, Cambridge, Geneve and INAF Trieste Requirements Spectral range: 400-650 nm Resolution 100000-150000 Stability 1cm/s with long term absolute calibration Concept The light is sent to 5 separate echelle spectrographs a la HARPS (in vacuum, at very stable T) Detector estate The spectra are spread out over 60 2K x 4K CCD (15 pixel). Within a factor of 2, depending on telescope size and resolution. r.o.n 1-2 e-,d.c. 1e/pix/h Camera Echelle mosaic 22 x 170 cm SDW 2005 _ 20.6.2005_S.D’Odorico/ 4b

  6. Earth-like Planet Imaging Camera Spectrograph Concept study by ESO and a number of scientists and engineers from different institutes in F, I, D,NL and SUI • EPICS starting point are the current studies for the Planet Finder at the VLT • The instrument aims at the detection and characterization of earth-like planets • The AO system for this instrument is expected to be a combination of the standard system offered by the telescope + an EXAO internal to the instrument • The observing modes being presently considered are Differential Imaging, Polarimetry and Integral Field Spectroscopy in the visual and Y,J bands SDW 2005 _ 20.6.2005_S.D’Odorico/ 5a

  7. Earth-like Planet Imaging Camera Spectrograph Concept study by ESO and a number of scientists and engineers from different institutes in F, I, D,NL and SUI Preliminary detector requirements from EPICS SDW 2005 _ 20.6.2005_S.D’Odorico/ 5b

  8. QUANTEYE Concept Study carried out by Dept.of Astronomy, Univ. Padova and Observatory, Univ. Lund (P.I.s C. Barbieri and D.Dravins) • Ultra-fast photometer for Quantum Astronomy • Main mode: to study the single photon arrival time statistics at the largely unexplored 10-3 -10 -9 second resolution. Large advantage from telescope size when studying photon correlation. • Wavelength range 400-700 nm, target on axis + reference in the 3 arcmin field, 2D resolution not required, • Single photon counting detectors with required ns resolution , high efficiency, low dark current SDW 2005 _ 20.6.2005_S.D’Odorico/ 6

  9. f/1 SPAD f/1 f/6 OWL focus f/1 … … M = 1/10 M = 1/6 QUANTEYE Concept Study carried out by Univ. Padova and Univ. Lund (P.I.s C. Barbieri and D.Dravins) 1 arcsec in OWL focalplane ~ 3mm. Present concept: to sample collimated beam in 100 subpupils Possible Detectors: 2 disperse arrays of 10 x 10 Si Single Photon Avalanche Diode (SPAD-A) AR coatings on SPAD-courtesy of S.Cova SPADA Test Chip-PoliMi SDW 2005 _ 20.6.2005_S.D’Odorico/ 6b

  10. Large-Field NIR Camera Concept Study carried out by INAF-Arcetri and MPIfA Heidelberg (P.I. R. Ragazzoni) • J,H,K; central field (30-60 arcsec diameter sampled at ~diffraction limit); outer field 3-6 arcmin. Choice dictated by AO performance, science case, cost and complexity. • MCAO using 2-3 DM for the central part, GLAO for the outer part • Detector Requirements • Central field of 30” sampled at 1mas (Nyquist at K)  15 x15 (2K x 2K)Hg Cd Te arrays (or 8 x 8 (4K x 4K), 12m pixels) • Outer field (e.g. 3’ x 3’) with a 10mas sampling  9 x 9 (2K x 2K)Hg Cd Te arrays SDW 2005 _ 20.6.2005_S.D’Odorico/ 7

  11. Multi–Object Multi–Field Imager Spectrograph Concept Study carried out by LAS Marseille, GEPI, Obs. Meudon, Obs. Lyon (P.I. J.G. Cuby) • Multi-IFU (30) system to pick up targets over the 3’ (6’) scientific field • “local” AO using mini DM in the light path of each IFU • Spectroscopy J or H or K in one shot at R= 4000 • Spatial sampling 50 mas, N pixels per IFU 30 x30 • 18 Hg Cd Te (2K x 2K) arrays / band SDW 2005 _ 20.6.2005_S.D’Odorico/ 8

  12. T – OWL(Thermal IR Camera - Spectrograph for OWL) Concept Study carried out by MPIfA Heidelberg and Leiden Observatory (P.I. R. Lenzen) Wavelength Range: 3- 27 m Imaging Pixel Scale: 3.5 mas@ 3-5 m, 7.0 mas @ 7-14 and 16-25 m FOV 15x15 arcsec 4 (2k x 2k) InSb (0.9 – 5.4 m) 4 (1k x1k) Si-As(2-28 m)* SDW 2005 _ 20.6.2005_S.D’Odorico/ 9

  13. SCOWL (SCUBA at OWL) Concept Study carried out by ATC (P.I. I. Egan) Imager in the 350 and 450 m bands (850 m desiderable) FOV 2 x 2 arcmin, Surveyer for ALMA targets Resolution <2 arcsec 4 SCUBA 2 TES Detectors (20480 pix) Transition Edge Sensors hybridized to a Superconducting Quantum Interference Design (SQUID) time-division multiplexer SDW 2005 _ 20.6.2005_S.D’Odorico/ 10

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