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Prime Focus Imaging Spectrograph Status

Prime Focus Imaging Spectrograph Status. All lenses figured and coated; collimator & camera in assembly Slitmask, waveplate, shutter, grating, articulation, filter mechanisms wired and tested Structure in final machining at Rutgers CCD detector delivery from SAAO this week

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Prime Focus Imaging Spectrograph Status

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  1. Prime Focus Imaging SpectrographStatus • All lenses figured and coated; collimator & camera in assembly • Slitmask, waveplate, shutter, grating, articulation, filter mechanisms wired and tested • Structure in final machining at Rutgers • CCD detector delivery from SAAO this week • VPH gratings shipping; beamsplitter due next month • Control system electronics boxes tested • Mechanism S/W coded/ tested; PI tool in progress • With 100% major purchases received or awarded, use of budget reserve is 99% • Concerns: schedule. Arrival at Sutherland slipped to ~15 Dec SSWG

  2. field flattener rework for dewar seal NaCl triplet in assembly Lens Optics • Collimator- problems with clean room; NaCl lens assembly. Delivery late this month (4 months late). Pacing item. • Camera- delivery late June • Detector- delivery this week (4 months late). Have 1 month for S/W integration SSWG

  3. Camera Barrel Collimator & Camera Assembly Main Group: including solgel and NaCl Field Lens Doublet Final Doublet Collimator SSWG

  4. 100 mm superachromatic halfwave plate Slitviewer Optics Other Optics Delivered 3000 l/mm VPH Grating Not delivered (very late): Etalons; Beamsplitter SSWG

  5. CCD Detector Field Flattener on cryostat SSWG

  6. Detector Engineering First Light Full Image: M83 M 83 SSWG

  7. Structure/ Mechanisms Grating Server Collimator Optics Camera Detector Dewar Slit Mask Server Waveplate Mechanism Filter Server Articulation Rail Open Truss Structure SSWG Fabry-Perot Etalons

  8. Structure Welded invar structure: Welding, heat treatment completed In finish machining Due end of May (4 months late) Dolly; test fixture ready Pacing item SSWG

  9. Mechanisms Slitmask Server Waveplate Rotator SSWG

  10. Mechanisms – II 162 mm shutter Grating Server Mechanism Effort: about 4 months late Filter Server SSWG

  11. Budget: Procurement Status SSWG

  12. Procurement Status - II SSWG

  13. Budget: Cost-to-Completion • With 100% of major purchased equipment received or awarded, have used 99% of budgeted reserve • $55K of CTC is SAAO foreign exchange losses; use of reserve would be 92% if excluded SSWG

  14. Budget: Deltas • Positive deltas (since last meeting/ expected) Tot • Optics and Invar actual cost overrun $52K • Machining underestimate $27K • Optomechanical (esp beamsplitter) $23K • Schedule stretchout $86K • SAAO labor ForEx losses $30K $218K • Schedule stretchout $45K? • Flattener rework and slitviewer mounting $10K? $55K? • Negative Deltas • Mechanism/ control system purchases -$21K • Dolly Design -$19K -$40K • Resale of CaF2 spares -$25K? -$25K? Projected Total $208K? ~$30K over cap with SAAO Forex ~$30K under without SSWG

  15. Concern: Schedule • Subsystem deliveries ~ 4 months late • Used remaining schedule slack; parallel integration schedule to recover ~1.5 months • Integration & testing phase manpower: graduate student, postdoc (UW contribution) • Uncertain test phase schedule: how much needs to be done before shipping? • Ship 4 Nov, 2004 • Arrive Sutherland 15 Dec, 2004 • Uncertain commissioning schedule • telescope commissioning • sky availability of planned targets SSWG

  16. Integration Schedule SSWG

  17. Testing and Commissioning Schedule • This part of schedule needs to be detailed... SSWG

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