The EUCLID Consortium - Mapping the Geometry of the Universe
The EUCLID Consortium presented their mission at a conference in Beijing, PR China in March 2017. The consortium outlined the science case, mission requirements, technical challenges, and detailed plans for their telescope, focusing on galaxy shape measurement, redshifts, spectroscopy, and photometry. Key aspects of the EUCLID telescope's design and challenges faced in launching and cooling were also discussed.
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The EUCLID Consortium EUCLID mapping the geometry of the universe Slide - 1 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Outline Science case Why EUCLID Basic mission requirements and layout Technical challenges and our answers About dirty and really dirty hardware (or: why alcohol could be a solution) Ghosts and stray light in EUCLID-NISP Slide - 2 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium The EUCLID agenda What needs to be done by EUCLID? Measure galaxy shapes on large spatial scales and deep in redshift space Measure galaxy distribution (x-y-redshift) on large spatial scales All sky survey , measure the maximum scale at the sky Large FoV Long mission Extreme stability (<- precise shape measurements) Slide - 7 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium A detailed plan.. Galaxy shape measurement in broad band VIS instrument with high resolution VIS band no further optics, just a focal plane at the telescope Redshifts and position measurement of all galaxies Spectroscopy of all objects bright enough (calibration set) Photometry of all objects Slide - 8 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium EUCLID telescope Korsch 3-Mirror An-Astigmat Off axis config Dichroic behind M3 <920nm// >920nm VIS -> FPA NIR via f#20 f#10 relay-> NIR FPA Slide - 9 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium EUCLID telescope 0.5 sqDegFoV Telescope image quality = Vis image quality Slide - 10 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Main challanges Launching by a Sojuz rocket is loud and shaky Cooldown to 130K is something If you have to keep your optics aligned to about 10 m xyz per lens absolute! We figured out an interferometric scheme of alignment and testing that is unique in the world Offering sub m resolution on 170mm large components (5ppm) Slide - 11 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium CaLA-FM integrated! Slide - 12 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium EUCLID NISP Slide - 13 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Launch Launched by means of a Sojuz / Fregatte Slide - 14 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium RSM Just as a reminder . Slide - 15 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium 8 Rings 8 rings (two of each kind) have been manufactured Slide - 16 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Two options Slide - 17 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Ni-OA testing Functional test (which is not about function at all) Cool down CaLA/CoLA and measure the movement of the componets to sub m scale Slide - 18 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Functional test Or with conservative error ellipses Translation: < 2mu TipTilt: <5 (mostly global tilt of ~4 ) Slide - 19 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Optical performance test Similar to system test But System is operated back to front (cold source plate, warm camera and wave-front sensor) Source plate carries IR and VIS (HeNe) fibers System is tested on axis not as in sat Round obscured pupil Slide - 20 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Optical performance test We measure WFE and PSF (MTF) Slide - 21 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Optical performance test We did this exercise for a warm scale model 0.8 Modulations- bertragungs-Funktion, 960_NI0A1_90_HI780_FW3_av32_A.shz Mittelwert 0.225502 RMS 0.204309 P-V 0.999705 Max 1 Min 0.000295367 Linien 0.05 50 1 Modulations bertragungsfunktion y / (lp/mm) 0.6 0 0.4 0.2 -50 Modulations- bertragungs-Funktion, 960_NI0A1_HI780_FW-3_av32_A.shz Modulations- bertragungs-Funktion, 960_NI0A1_HI780_FW+3_av32_A.shz Modulations- bertragungs-Funktion, 960_NI0A1_HI780_F0_av32_A.shz Mittelwert 0.201736 RMS 0.18025 P-V 0.999852 Max 1 Min 0.000148302 Linien 0.05 Mittelwert 0.190149 RMS 0.182712 P-V 0.998837 Max 1 Min 0.00116312 Linien 0.05 Mittelwert 0.247474 RMS 0.223775 P-V 0.999128 Max 1 Min 0.000872426 Linien 0.05 -80 -60 -40 -20 0 20 40 60 80 x / (lp/mm) 50 1 50 50 1 1 Modulations bertragungsfunktion Modulations bertragungsfunktion Modulations bertragungsfunktion 0.8 0.8 0.8 y / (lp/mm) y / (lp/mm) y / (lp/mm) 0.6 0.6 0.6 0 0 0 0.4 0.4 0.4 0.2 -50 0.2 0.2 -50 -50 Modulations- bertragungs-Funktion, 960_NI0A1_90_HI780_FW-3_av32_A.shz -80 -60 -40 -20 0 Mittelwert 0.161859 -80 -60 -40 -20 0 20 40 60 80 -80 -60 -40 -20 0 20 40 60 80 RMS 0.157588 P-V 0.998252 Max 1 Min 0.00174789 Linien 0.05 20 40 60 80 x / (lp/mm) x / (lp/mm) x / (lp/mm) 50 1 Modulations bertragungsfunktion 0.8 y / (lp/mm) 0.6 0 0.4 0.2 -50 -80 -60 -40 -20 0 20 40 60 80 x / (lp/mm) Slide - 22 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium EUCLID NISP stray-light and ghosting Slide - 23 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium A coplex model The model in pictures: Slide - 24 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Photometer Ghosts and shiny mech. SNDI field centre Relative level: 1e-7.27 factor 37 below requirement (2e-6) Slide - 25 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Photometer Ghosts and shiny mech. SNDI worst field point F1 F1 is worst as most of light from detector sees L3 (due to the detector tilt)! Relative level: 1e-6.99 factor 19 below requirement (2e-6) Slide - 26 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Photometer (6) Stray light NDI field centre Slide - 27 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Photometer (7) Stray light NDI field centre relative to requirement The thin black line shows the nominal FoV Near field centre the requirement is exceeded by 2.6 (relative) In the wings the requirement is met with factor 0.3 safety Slide - 28 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Next steps A Harvey model is fitted to the NI-GS measurements. (1D-2D tbd) and scaled by the spot theoretical intensity Slide - 31 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
The EUCLID Consortium Thank you! Dont worry about dust too much for NISP Slide - 32 Beijing, PR China March 2017 Frank Grupp, frank@grupp-astro.de
