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Spectrographs

Spectrographs. French participation. Presentation. Finding out 3 optical solutions: Will to have three solution to trade off Telescope reflectivity Environmental condition for the spectrograph Next activities. Optical Design Options: Option A: Boss Like (not real explored)

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Spectrographs

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  1. Spectrographs French participation

  2. Presentation • Finding out 3 optical solutions: • Will to have three solution to trade off • Telescope reflectivity • Environmental condition for the spectrograph • Next activities

  3. Optical Design Options: • Option A: Boss Like (not real explored) • Option B: Wavelenght separation prior the collimator • Option C: Wavelength separation prior the slit entrance Spectro Fibers Spectro Spectro Cam Fibers Spectro Fibers Coll Cam

  4. Option B

  5. UV Spectrograph Thermal blocking Filter Dichroics NIR Spectrograph Width: 750 mm Fibers bundle Visible Spectrograph Length: 1000 mm Thickness: 250 mm

  6. Spot diagram

  7. Encircled energy - UV

  8. Encircled energy - Visible

  9. Encircled energy - NIR

  10. Throughput

  11. Grating summary

  12. Option C

  13. Wavelength separation NIR Optomechanics (10 spectrographs) Read out electronics Cryogenic support From Telescope VIS Optomechanics (10 spectrographs) Read out electronics Cryogenic support UV Optomechanics (10 spectrographs) Read out electronics Cryogenic support

  14. 0.9 1.8 0.7 71

  15. Telescope Reflectivity

  16. Environemental conditions

  17. For the spectrograph room • 20°C +/- 1°C (TBC) • Hygrometry: 55% +/-10% (TBC) • Clean room: 100 000? 1000? • Weigth • Liquid Nirogen ? Cryo cooler? • Earthquake?

  18. On going activity • UV Spectrograph optical design finalization • Winlight budgetary estimation • Thermal dimensioning (cryostats, cooling) • Preliminary french deliverable list and WBS • Grating investigation • Preliminary opto-mechanical concept • Prototyping plan definition Future activity

  19. WBS French activities

  20. Management AQ System R&D phase Cryostat CCD (E2V) AIT/AIV Characterization Delivery to project Spectrographs Management Specification Cryogenic Optical design Design Charact. Plan Specification AIT/AIV plan Design Provisionning AQ Specifications Optics Optomecha Cryo V1 Tools procurement Tools procurement Spectro V1 Manuf. Manuf. Test Benchs Cryostats Specifications CCD (E2V) Characterisation V1 AIT AIT/AIV AIT/AIV Modif. Modif. Characterisation Manufactur. Specification AIT/AIV AIT/AIV plan Manufactur. Optimisationc Report AIT/AIV serial Interfaces AIT/AIV Prototyping Budgets Acceptance

  21. Deliverables to the project • Spectrograph: • Optics • Opto-mecha • Cryostat with detectors included • Cryogenic system (TBD) (LBL CCD and HgCdTe plus ROE for all detector deliverd by the project) • CCD (E2V) caractérisation report • Spectrograph caracterisation report • Slow control of the cryogenic

  22. Electrical interface Vaccum interface Cryogenic system Spectrograph Cryostat Thermal interface Entrance Window Optics Fiber bundle Optical interface Detector Fluid interface Thermal interface Electrical interface Mechanical interface Mechanical interface Electrical interface Mechanical interface Mechanical interface Mechanical interface Readout electronic Electrical interface External interface From project

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