Prime Focus Imaging Spectrograph Status

1
Prime Focus Imaging SpectrographStatus

• Detector delivered and software interface
  upgraded
• Collimator and Camera optics delivered and
  aligned
• 3 gratings completed 3 being AR coated
• beamsplitter elements delivered mount in
  fabrication
• two of three etalons delivered filters in
  fabrication
• Structure delivered, integration near completion
• Control system electronics boxes tested
• Mechanism S/W coded/ tested PI tool in progress
• With 100 of purchases and subcontracts made or
  awarded, estimated CTC 84,000 (1.8) over PDR
  cap
• Arrival at Sutherland slipped to 1 Mar. Schedule
  now holding

2
CCD Detector

• Delivered May (4 months late)
• Software interface work to increase reliability
  of detector- instrument control communication
• Compatible IRAF mosaic format
• Integration with camera this week

3
Lens Optics

• Collimator- delivered August (6 months late).
  Images good. One solgel surface somewhat
  contaminated.
• Camera- delivered October (8 months late).
  Images good. Surfaces very good.

4
Collimator Integration
Main Group
Doublet
Fold Flat
Field Lens
5
Camera Integration
Articulation Hub
240 mm Asphere
6
VPH Gratings
1300 l/mm VPH Grating
Grating Actual Spec Actual Spec
Eff Eff FWHM FWHM
900 0.907 0.850 484 450
1300 0.963 0.900 302 320
1800 0.724 0.870 201 160
2300 0.820 0.840 148 115
3000 0.764 0.880 78 100
3 Gratings Very Good 2 Gratings (including hires
UV)
7
BeamSplitter
UV Calcite Element (of 18)
8
Beamsplitter Mosaic
Thermal Testing
Mosaic Mount with aligment tabs
9
Etalons

• Two of three received
• Efficiency in spec
• Resolution 20 low (combination of coatings and
  flatness)
• Third still in work
• 40 interference filters ordered 10 large to
  accomodate use with VPH

10
Structure/ Mechanisms Integration
Grating Server
Collimator Optics
Camera
Detector Dewar
Slit Mask Server
Waveplate Mechanism
Filter Server
Articulation Rail
Open Truss Structure
Fabry-Perot Etalons
11
Structure
On Dolly in Assembly Room
Receiving
12
Integration
Webcam www.sal.wisc.edu/PFIS/docs/html/webcam.html
13
Integration II
Articulation integrated test
14
Budget Cost-to-Completion

• increase 125K from last meeting
• no further increases anticipated

15
Budget Deltas

• Positive deltas (since last meeting/
  expected) Tot
• structure machining 30K
• interference filters 14K
• other RU actuals 20K
• beamsplitter 16K
• Schedule stretchout 50K
• Flattener rework and slitviewer mounting 10K?
• Negative Deltas
• Resale of CaF2 spares -25K? 25K?
• Projected Total 125K?
• 80K over cap

16
Schedule

• Subsystem deliveries 4 -8 months late
• Schedule now proceeding as planned
• Used remaining schedule slack parallel
  integration schedule to recover 3 months
• Late beamsplitter, third etalon may delay testing
  until after ship
• Ship 23 Jan, 2005
• 1 month in Capetown includes detector refurb
• Arrive Sutherland 1 Mar, 2004
• Commissioning schedule
• telescope SALTICAM commissioning should be done
  by beginning of science commissioning in April
• sky availability of planned targets

17
Integration Schedule
18
Testing and Commissioning Schedule