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| - | ===== The European Solar Telescope (EST) ====== | ||
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| - | * The [[http:// | ||
| - | * The [[http:// | ||
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| - | ---- | ||
| - | \\ | ||
| - | ** Design study** | ||
| - | \\ | ||
| - | [[this> | ||
| - | \\ \\ | ||
| - | * French solar community involvement in EST [[this> | ||
| - | * EST/DS Phase III (final) [[this> | ||
| - | * End of Phase III [[this> | ||
| - | \\ | ||
| - | ---- | ||
| - | ** EST performances requirements ** | ||
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| - | | 4.2.1 |Field of view | 2´x2’ (goal 3´x3’). | ||
| - | | 4.2.2 |Total throughput| >10% (30% telescope; 30% instruments)| | ||
| - | | 4.2.3 |Wavelength coverage | 390nm to 2.3μm (goal 350 nm to 2.3μm) with AO correction (Coudé focus) 315 nm to 20 μm without AO (Nasmyth focus)| | ||
| - | | 4.2.4 |Light distribution| Configurable with different fractions of light going to different instrument channels| | ||
| - | | 4.2.5 |Photon flux | > 2.106 photon/ | ||
| - | | 4.2.6 |Polarimetric sensitivity | 3.10-5 in S/I, S any stokes parameter| | ||
| - | | 4.2.7 |Polarimetric accuracy | Accuracy to know crosstalk between Stokes parameters| | ||
| - | | 4.2.8 |Scattered light at 500nm |< 10 % at 1” distance from the scattered light source on the science focal plane, \\ < 1% at 5” distance \\ Coronal observations, | ||
| - | |4.2.9 |Sky coverage | Ecliptic above 10º on the horizon (goal full sky)| | ||
| - | |4.2.10 |Observable radius away from the Sun| 200” from the solar limb \\>5 º (goal >2º) away from the Sun avoiding solar illumination | | ||
| - | |4.2.11 |Image stability| 0.004”/ | ||
| - | |4.2.12 |Image scanning step | Time< | ||
| - | |4.2.13 |Image scanning repeatability| 0.002´´ Spectrographs 1” (TBC) mosaic mode for BB and NB imagers | | ||
| - | |4.2.14 |mage scanning stability | 0.01” over 1 hour | | ||
| - | |4.2.15 |Absolute pointing accuracy | <3” | | ||
| - | |4.2.16 |Open loop tracking accuracy | <1” /10minutes | | ||
| - | |4.2.17 |Image quality with closed loop MCAO | SR500nm=0.3 (TBC) for 1´FoV and SR500nm=0.4 (TBC) for 30”FoV for r0>20cm. \\ SR500nm=0.15 (TBC) for Ø1´FoV and SR500nm=0.25 (TBC) for Ø30”FoV for r0>10cm | | ||
| - | |4.2.18 |Closed loop MCAO for near-limb observations |AO low order mode for observations near the limb, using Hα images. Performances TBD| | ||
| - | |4.2.19 |Image quality without closed loop AO | Image quality degradation <10% seeing conditions for good seeing conditions (r0 =20cm at 500 nm) | | ||
| - | |4.2.20 |Data flow | Data flux 200GB/sec Data volume 275PB/year | | ||
| - | |4.2.21 |Maximum time between image acquisitions in mosaic mode | 2s for contiguous subfields \\ 6s for non contiguous subfields | | ||
| - | //(Table from L. Cavaller (IAC & GranTeCan) & the EST project)// | ||
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| - | < | ||
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| - | © 2024 CNRS-THEMIS <br> | ||
| - | Terms of use: unless otherwise specified, all graphical (webcam records, movies, pictures) | ||
| - | </ | ||
