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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 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) • 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
UV Spectrograph Thermal blocking Filter Dichroics NIR Spectrograph Width: 750 mm Fibers bundle Visible Spectrograph Length: 1000 mm Thickness: 250 mm
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
0.9 1.8 0.7 71
For the spectrograph room • 20°C +/- 1°C (TBC) • Hygrometry: 55% +/-10% (TBC) • Clean room: 100 000? 1000? • Weigth • Liquid Nirogen ? Cryo cooler? • Earthquake?
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
WBS French activities
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
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
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