1. Prime Focus Imaging Spectrograph Status
8 of 9 collimator and 6 of 9 camera lenses received (including all CaF2 lenses)
Slitmask mechanism assembled and wired, waveplate mechanism assembled
Structure in fabrication at Rutgers
Waveplates shipping; beamsplitter due next month
Mass under control: margin improved 11.8  15.3 kg
Control system wiring, S/W in progress
With >96% awarded, use of budget reserve is 77%
Concerns: schedule
Oct 26, 2003
SSWG

2. Optics
Collimator- looks like it will be ready in time for the structure (Jan)
Camera- Unless coating goes faster than vendor schedule (12 wks), will becomes critical path and could delay delivery. Need by Mar
Detector- Want 1 month before camera
Still in fab; awaiting new delivery date
Asphere delayed on month
"Pickup" element: awaits asphere
Vendor broke 2 NaCl blanks; new ones just received
Oct 26, 2003
SSWG

3. Collimator Fused Quartz Fused Quartz CaF2 Fused Quartz CaF2 (NaCl)
Oct 26, 2003
SSWG
Fused Silica
CaF2

4. Camera (Fused Silica asphere) CaF2 Fused Silica CaF2 CaF2
(Fused Silica “pickup”)
NaCl
Fused Silica
(Fused Silica field flattener)
Oct 26, 2003
SSWG

5. The Prime Focus Imaging Spectrograph
Grating Server
Collimator Optics
Camera
Detector Dewar
Slit Mask Server
Waveplate Mechanism
Filter Server
Articulation Rail
Open Truss Structure
Oct 26, 2003
SSWG
Fabry-Perot Etalons

6. Structure & Mechanisms
Slitmask Mechanism
Structure Base Jig
Waveplate Mechanism
Oct 26, 2003
SSWG

7. Procurement Status Item PDR Estimate Now Low bid Other bidders Status
Company
Delivery
CaF2 Blanks
$98,116
$120,260
Oken
80d
Bicron
Received, including $32,800 in spares
Fused Silica Blanks
$9975
Dynasil
4 wk
Corning, Oken
Received, including 1 spare
NaCl Blanks
$10,020
Hilger
6 wk
Rubicon
Received, including 4 replacements
Fused Quartz Blanks
$13,650
75 d
Heraeus
Received
Lens Fab-
asphere
$168,714
$33,000
Coastal
20 wk
TORC, Tinsley
Awarded
spheres
$31,215
Janos
8 wk
Coastal, TORC, HJOL
MgF2/ Solgel
coatings
$55,918
Cleveland
Crystal
soliciting more
Multilayer Coatings
$12,300
Spectrum Thin Films
RMI
Waveplates
$120,000
$83,000
Halle
6 mo
none
Beamsplitter
$44,100
$53,100
Karl Lambrecht
30 wk
Reynard
Oct 26, 2003
SSWG

8. Procurement Status - II
Item
PDR Estimate
Now
Low bid
Other bidders
Status
Company
deliv
VPH Substrates
$30,000
$11,850
United Lens
30 d
HJOL, Coastal
Received
VPH Coatings
$3,975
Spectrum Thin Films
Quotation
VPH Fabrication
$24,950
Wasatch
8 wk
CSL, KOSI
Awarded
SR Grating
$8,696
Richardson
10 wk
Zolotech
Color Filters
$10,000
Estimate
Slitviewer Optics
$4,700
TORC
6 wk
Coastal, HJOL, Edmund, Zygo
Slitmask Cutter
$120,000
$123,405
US Laser
4 mo
LPKF, ART
Total
$590,930
$610,014
Oct 26, 2003
SSWG

9. Budget: Cost-to-Completion
With >96% of major purchased equipment awarded, have used 77% of budgeted reserve
Remaining $169K available for mishaps and schedule problems
Would pay for ~ 5 mo schedule stretch at highest salary burn rate
Oct 26, 2003
SSWG

10. Budget: Prognosis Positive deltas Negative Deltas
spare CaF2 blanks: $32,800. Will probably be recovered.
SAAO labor ForEx losses $41K (how is this accounted?)
NaCl and Fused Silica spares $8K
design subcontractor ~$30K
machining underestimates ~$20K
Negative Deltas
conservative PDR mechanism costs ~$9K
Lens Fabrication savings ~25K
Oct 26, 2003
SSWG

11. Concern: Schedule Optics delivery critical path
Mechanism “waterfall” easily disrupted
testing delayed until enough of control system is wired
Testing phase: graduate student, postdoc (UW contribution)
Detector delivery has only 4 weeks slack
Etalon delivery has 2 months slack
Ship 23 Aug, 2004
Arrive Sutherland 1 Oct, 2004
Uncertain commissioning schedule
Oct 26, 2003
SSWG

12. Mechanical Schedule
Oct 26, 2003
SSWG

13. Optics Schedule
Oct 26, 2003
SSWG

14. Control System
Oct 26, 2003
SSWG

15. Testing and Commissioning Schedule
Oct 26, 2003
SSWG

16. Some Questions Filter complement
Etalon interference filters currently planned for imaging only (85 mm dia), not spectroscopy (125 x 85). Some suggestion for subset of larger ones for multislit applications (eg 510 nm region). Others?
No plan for interference filters for imaging below 430 nm (etalon limit). Problem?
How will we commission if SALT does not have full mirror complement? What is absolute minimum for turnover?
Oct 26, 2003
SSWG