SALT PFIS Preliminary Design Review

1
Southern African Large TelescopePrime Focus
Imaging Spectrograph

• Fabrication and Test Plan
• Jeffrey W Percival
• University of Wisconsin - Madison

2
Facilities

• UW Dept. of Astronomy resources
• Machinist
• 3 Electronics Technicians,1 with spaceflight
  qualifications
• Well-equipped machine shop
• Class 1K clean room with 2 class 10 flow tents
  and 1 laminar flow bench
• Thermal chamber covers all SALT operating and
  survival ranges in temperature - sized for
  actuators and mechanisms, not structure
• Available from UW Physics Dept
• 6-person machine shop, accepts any size job
• Available from Rutgers University
• Large machine shop with invar welding

3
Fabrication and Test Strategy

• Mitigate large number of mechanisms with
  pipeline
• Standard bench setups for acceptance testing of
  actuators
• Test mechanisms as they come out of fabrication
• Rapidly prototype software modules, use early
  experience to feed back into design
• High degree of commonality allows a few standard
  modules to be reused over and over
• Simulate missing components to allow high-level
  controls to be prototyped and used

4
Test Procedures

• Testing will be required throughout program
• Bench-level testing of components
• Assembly-level testing
• Instrument-level testing
• Pre-ship functional
• Acceptance testing in Cape Town
• Complete functional testing in Sutherland
• Procedures will be developed incrementally
• Procedures will embody experience gained during
  fabrication

5
Documentation

• Documentation will include
• User manual
• Troubleshooting guide
• Software source code
• Test procedure scripts
• Mechanical drawings
• Wiring diagrams and lists
• Vendors material for purchased items

6
Interfaces Detector Telescope

• Detector and telescope services will be provided
  according to an interface using LabVIEW network
  protocols
• Very important early design, rapid prototyping,
  nail down the ICDs.
• Simulation mode is critical - support protocols
  before actually providing services
• Test software modes long before integration of
  hardware
• Frequent incremental exchanges of software
  simulators
• Intercontinental testing of network modules