Transcript pfis_status_2003.04.29

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, 2003
SSWG
1
Full-Up Model of PFIS
Baffling
PXI Box
Detector
Electronics
PSC2 Box
Apr 29, 2003
SSWG
2
PFIS – 900 Articulation
Rotating Baffling
Apr 29, 2003
SSWG
3
Structure & Mechanisms
Apr 29, 2003
SSWG
4
Mechanisms
Grating
Collimator
Focus
Fold Mirror
Detector
Shutter
Slitmask
Filter
Apr 29, 2003
SSWG
5
The Way Forward
• Interfaces need to be finalised
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–
–
–
•
•
•
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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, 2003
SSWG
6
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 20-25 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, 2003
SSWG
7
400
Apr 29, 2003
SSWG
Loaded/ loaded
Single/ Single Etalon
Double/ Double Etalon
Single
Beam Ops
Grating/ Grating
Grating/ Single Etalon
Grating/ Double Etalon
As Delivered
(80 kg trim)
Fully Loaded
650
Single Etalon
Double Etalon
Grating
Fully Loaded
Single Etalon
Double Etalon
600
Grating
Mass (kg)
Mass vs Configuration
With NIR Beam = Vis Beam
(190 kg, loaded)
Dual
Beam Ops
550
500
450
8
PFIS CCD’s
100
SALT-03
SALT-04
SALT-06
80
%QE
• The CCD’s
have been
delivered.
QE equals
or exceed
the
“typical”
manufacturer’s QE
curve
60
Typical
40
Min
20
300
Apr 29, 2003
500
700
Wavelength (nm)
SSWG
900
9
VPH complement
6000
2300 l/mm
3000 l/mm
1800 l/mm
50°
50°
50°
4000
40°
40°
40°
35°
R
30°
30°
30°
25°
2000
1300 l/mm
15°
900 l/mm
[OII]
300
Apr 29, 2003
400
500
CaII
Hα [SII]
Hβ [OIII]
700
600
Wavelength (nm)
SSWG
800
900
10
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
Example:
Collimator
layout
Apr 29, 2003
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Procurement Status
Low bid
Item
CaF2 Blanks
Fused Silica
Blanks
NaCl Blanks
Fused Quartz
Blanks
Lens Fabasphere
PDR
Estimate
$8,750 Dynasil
$4,275 Hilger
$98,116
$13,650 Oken
$33,000 Coastal
spheres
MgF2/ Solgel
coatings
Multilayer
Coatings
$168,714
Waveplates
$120,000
Beamsplitter
$44,100
Apr 29, 2003
Now
Company
$87,460 Oken
Deliv
ery
Other bidders
80d
Bicron
Corning,
4 wk Oken
6 wk Rubicon
75 d
20
wk
Status
Awarded Due15 May
Received
In testing
Shipping
8 wk
Heraeus
TORC,
Tinsley
Coastal,
TORC, HJOL
soliciting
more
Awarded
$53,000 Janos
Cleveland
$55,918 Crystal
Spectrum
$12,300 Thin Films
8 wk
6 wk
RMI
Prelim quote
$83,000 Halle
Karl
$53,100 Lambrecht
6 mo
30
wk
none
Awarded
Reynard
Awarded
SSWG
Awarded
Prelim quote
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Procurement Status - II
Item
PDR
Estimate CDR
VPH
Substrates
Low bid
Company
deliv
$11,850 United Lens
VPH
Coatings
$30,000
VPH
Fabrication
$6,920 Richardson
Color Filters
$10,000
Slitviewer
Optics
HJOL, Coastal
Received
Quotation
8 wk
CSL
Quote in progress;
waiting for KOSI
9 wk
none
Quotation
$10,000
Estimate
$4,700 TORC
6 wk
Coastal, HJOL,
Edmund, Zygo
4 mo
none yet
Slitmask
Cutter
$120,000
$120,785 US Laser
Total
$590,930
$587,633
Apr 29, 2003
Status
$3,975 Spectrum Thin Films
$24,950 Wasatch
SR Grating
30 d
Other bidders
SSWG
Quotation
Quotation
13
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
Apr 29, 2003
1
2002
2003
2004
0.8
0.6
CDR
0.4
Shipping
0.2
PDR
Date
Reserve Use
SSWG
14
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, 2003
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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, 2003
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Schedule at CDR
Task Name
2004
2nd Quarter
3rd Quarter
4th Quarter
1st Quarter
2nd Quarter
Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun
Prime Focus Imaging Spectrograph
Phase 4 - Fabrication & Test
Mechanical Fabrication and Test
Review CDR comments and Implem
Undertake Final FEA of PFIS Struct
Wave Plate Mechanism
Slitmask Mechanism
Structure
Camera Focus
Grating Mechanism
Articulation Mechanism
Beam Splitter Mechanism
Filter Mechanism
Mirror Assembly
Etalon Assembly
Optical Integration and Test
Integrated Test
Control System's Fabrication and Test
Finalize Wiring diagrams
Procure Power Supplies, Actuators
Wire each mechanism (sam)
Build wire Harness (sam)
Build Interlock Module (sam)
Integrate Electronic Boxes (sam)
Procure PXI modules (jeff)
Implement PFIS Mechanism Server
Coding client for each mechanism
Debug CLIENT for each Mechanism
Implement User Inteface
Implement simulators for TCS & CC
Produce User's Manual
Apr 29, 2003
3.53 days
34.08 days
44.4 days
104.7 days
61.58 days
61.58 days
61.58 days
19.82 days
19.96 days
19.82 days
19.82 days
SSWG
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Schedule at CDR - II
Task Name
2004
2nd Quarter
3rd Quarter
4th Quarter
1st Quarter
2nd Quarter
Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun
Optics Fabrication & Test
Camera / Collimator lens figuring
Sent for coating
VPH fabrication
Waveplate fabrication
Beamsplitter fabrication
Slitmask RFQ
Slitmask purchase
Optomechanical Consulting
PFIS Assembly & Integration
Collimator assembly and integr
Collimator alignment testing
Camera integration
Camera alignment testing
Slitmask integration and test
Grating integration and test
Filter integration and test
Camera focus integration and test
Wave plate integration and test
Beamsplitter integration and test
Etalon assembly and testing
PFIS Testing
Detector fabrication and test
Etalon fabrication and test
Detector allignment and testing
Filter and Grating tests
Image quality testing
Additional testing
Apr 29, 2003
14.36 days
SSWG
18