Apr 29, 2003SSWG1 Prime Focus Imaging Spectrograph Status Passed CDR- moving into fabrication phase Mechanism design complete: fabrication drawing packages for all All 3 PFIS CCD’s delivered: good – excellent VPH complement defined Optical blanks received or due mid-May Lens fabrication, waveplate and beamsplitter awarded 2 of 3 etalons into final figuring Full –up control system using generic mechanism demonstrated With >95% firm quotes, use of budget reserve is 63% Concerns: schedule, weight budget

Apr 29, 2003SSWG2 Full-Up Model of PFIS Detector Electronics PSC2 Box PXI Box Baffling

Apr 29, 2003SSWG3 PFIS – 90 0 Articulation Rotating Baffling

Apr 29, 2003SSWG4 Structure & Mechanisms

Apr 29, 2003SSWG5 Mechanisms Filter Detector Collimator Focus Fold Mirror Grating SlitmaskShutter

Apr 29, 2003SSWG6 The Way Forward Interfaces need to be finalised –UW-SALT – PFIP interface ring, Guider, Utilities –UW-SAAO – Camera-Detector, Electrical Boxes –UW-Rutgers – Etalons, Mounting the actuators, Nests –UW-OptoMech – Guider mount-field lens, Camera Fabrication drawings completed, April 2003 Fabrication, Procure parts - Articulation, May 2003 Procure Invar Tubes for structure fabrication Structure fabrication kick-off, May 2003

Apr 29, 2003SSWG7 Concern: Mass Budget As delivered: –Collimator + fully loaded visible beam + 80 kg trim is within 500 kg ICD limit (trim require to bring CG within 50 mm of axis per ICD) –CDR mass estimate is robust since >92% of mass has detailed design –Trim can be traded for Auxiliary Port, which is under NIR beam NIR beam upgrade path –With goal NIR beam mass budget = Vis Beam = 190 kg, most modes supported at 525 kg if not all dispersors simultaneously loaded –=> Need to save kg, reduce NIR Beam mass budget and/or use payload mass margin when NIR beam delivered –Operational constraint from not having all modes simultaneously is consistent with no longer being sole major instrument (eg HRS) when NIR beam arrives.

Apr 29, 2003SSWG8 Mass vs Configuration

Apr 29, 2003SSWG9 PFIS CCD’s The CCD’s have been delivered. QE equals or exceed the “typical” manufac- turer’s QE curve

Apr 29, 2003SSWG10 VPH complement

Apr 29, 2003SSWG11 Example: Collimator layout Optomechanical Award subcontract for optomechanical to J. Alan Schier –optomechanics for Keck ESI, DEIMOS –comfortable with fluid coupling, salt, solgel Tasks –mounting tolerancing –design, fabricate lens holders –assemble lens groups

Apr 29, 2003SSWG12 Procurement Status Item PDR EstimateNow Low bid Other biddersStatus Company Deliv ery CaF2 Blanks $98,116 $87,460Oken80dBicronAwarded Due15 May Fused Silica Blanks$8,750Dynasil4 wk Corning, OkenReceived NaCl Blanks$4,275Hilger6 wkRubiconIn testing Fused Quartz Blanks$13,650Oken75 dHeraeusShipping Lens Fab- asphere $168,714 $33,000Coastal 20 wk TORC, TinsleyAwarded spheres$53,000Janos8 wk Coastal, TORC, HJOLAwarded MgF2/ Solgel coatings$55,918 Cleveland Crystal8 wk soliciting morePrelim quote Multilayer Coatings$12,300 Spectrum Thin Films6 wkRMIPrelim quote Waveplates$120,000$83,000Halle6 mononeAwarded Beamsplitter$44,100$53,100 Karl Lambrecht 30 wkReynardAwarded

Apr 29, 2003SSWG13 Procurement Status - II Item PDR EstimateCDR Low bid Other biddersStatus Companydeliv VPH Substrates $30,000 $11,850United Lens30 dHJOL, CoastalReceived VPH Coatings$3,975Spectrum Thin FilmsQuotation VPH Fabrication$24,950Wasatch8 wkCSL Quote in progress; waiting for KOSI SR Grating$6,920Richardson9 wknoneQuotation Color Filters$10,000 Estimate Slitviewer Optics$4,700TORC6 wk Coastal, HJOL, Edmund, ZygoQuotation Slitmask Cutter$120,000$120,785US Laser4 monone yetQuotation Total$590,930$587,633

Apr 29, 2003SSWG14 Budget: Cost-to-Completion Used reserve early to control schedule risks With formal quotes for >95% of major purchased equipment, have used 63% of budgeted reserve Remaining $268K available for mishaps and schedule problems Would pay for ~ 7 mo schedule stretch at highest salary burn rate Reserve Use

Apr 29, 2003SSWG15 Budget: Prognosis Expected positive deltas –spare blanks: $32,800 –design subcontractor ~$30K –CDR requested changes: ~$15K –machining underestimates? Expected negative deltas –spare cost recovery if not used –optics testplate redesign ~$25K –cost savings on mechanisms ~$10K -> $220,000 to spend on schedule: 6 months

Apr 29, 2003SSWG16 Concern: Schedule Fabrication phase schedule exercise now underway Structure is critical path until articulation installed, then passes to optics integration & test Optics delivery has only 2 weeks slack –improved to 5 weeks by splitting asphere and sphere award Mechanism “waterfall” easily disrupted –re-order to do articulation, slitmask early, polarimetric last. Testing phase: graduate student, postdoc (UW contribution) Detector delivery has only 6 weeks slack Etalon delivery has 3 months slack Ship 21 June, 2004

Apr 29, 2003SSWG17 Schedule at CDR

Apr 29, 2003SSWG18 Schedule at CDR - II