ODI Dewar CDR Dewar Test Plan

1. ODI Dewar CDRDewar Test Plan

2. Jan Jan Feb Feb Mar Mar Apr Apr May May Jun Jun Jul Jul Aug Aug Sep Sep Oct Oct Nov Nov Dec Dec ODI Assembly and Integration Time Line 2009 Summer Shutdown ISP Assembly ADC Bonding ISP Lab Test ISP@WIYN ISP to remain at KPNO (?) Dewar Window Assembly to Tucson Dewar Shell Assembly & Thermal Testing Shell Complete Delivery of populated focal plane Lot 4 & Stargrasp Dewar & Test Stand Focal Plane Testing 2010 Cntd. All WIYN facility upgrades to be finalized and checked out ODI Installation ... ODI Commissioning continued ODI Commissioning

3. Dewar Assembly & Test Phases • Phase I: April - August 2009 • Establish operations of dewar & thermal control system. • Dewar shell, back-plate, metal front plate (no window!). • All connections and infrastructure but CCD flex circuits. • Dummy focal plate with resistors for simulated heat load. • Leak test and thermal control system evaluation. • Phase II: September 2009 • Establish readiness of Dewar to mount populated focal plate. • Install Dewar window. • Install CCD flex feed-through side plates. • Remove dummy focal plate. • Phase III: October 2009 - January 2021+ • Establish readiness for installation at WIYN. • Install populated focal plate. • Connect detectors • Attach STARGRASP controller • Detector/Controller/Software system testing & optimization.

4. Dewar Assembly Room Considerations • Space constraints • Dewar on cart has large envelope. • Phase I (thermal & vacuum testing) • Moderately clean room. • Phase II (vacuum testing w/ optics & all feedthroughs) • Clean room. • Clean room for focal plate mount. • Phase III (focal plate installation) • Clean room. • Install focal plate. • Establish electrical connections to detectors. • Establish all other electrical connections. • Ensure alignment of focal plate in Dewar. • Keep facility available throughout Dewar/CCD testing

5. Dewar handling cart • Design to be adjusted to support assembly & testing.

6. Dewar Test Phase I • Dewar Configuration • Vacuum pumping capability. • 5kW Helium compressor. • Thermal control system. • 2nd Focal plate wired up to simulate 120W heat load • Vacuum test • Long-term vacuum/outgassing monitoring • Helium leak tests • Thermal Control System Tests • Tuning of control loop under normal operating conditions • Failure mode tests • Runaway heating • Runaway cooling • Helium compressor shutdown • Test with disconnected cables, router failure etc.

7. Dewar Test Phase II • Moderately clean room (front lens attached). • CCD flex-circuit feedthrough plates installed. • Dewar Window Installed. • Vacuum test & monitor equipment same as in Phase I. • Vacuum tests • Helium leak tests • Long-term monitoring of vacuum an outgassing. • Verify dewar window does not break.

8. Dewar Test Phase III • Dewar Operation • Moderately clean room (front lens mounted) • 5kW Helium compressor, focal plane thermal control system. • WEll-tested thermal control system. • STARGRASP Operation • 1.2kW (controller) + 1.2kW (power supply) heat dissipated into room. • Glycol cooling lines to cool controller housing. • Heat sink? • 32x ethernet over fiber routed to computer cluster • Locate computer cluster in test lab? • Additional infrastructure requirements. • Optical bench for test setup • LCD screen, projection lens mount, shutter. • ~3m throw from ODI dewar window to projection screen. • Detector optimization, basic controlled OTA mode testing.

9. Focal Plate/CCD Controller Evaluation • Need to optimize detectors. • Define optimal temperature set point. • Fine-tune voltages, clocking patterns. • Mike Lesser will have established initial voltages, good starting point. • Photon transfer curve, imaging required • no Fe-55 capability available in the dewar. • Need to optimize Orthogonal Transfer Modes • Acquire guide stars • Do OT-loop modes • need to project & move guide star field on focal plane • HDTV projector, image directly onto focal plate. • Large-scale illumination for global optimization • Small-scale illumination for OT guide tests • Can control and vary the projected image.

10. Dewar Assembly & Test: Status • Timeline and global test requirements defined. • Work on implementation plan starts now. • NOAO all hands meeting two weeks ago. • Identify lab space at NOAO. • Identify support personnel at NOAO, ITL. • Timely delivery of populated focal plate in October is critical path. • Only 4 month for focal plate integration and testing. • Includes CCD controller integration. • Aggressive schedule, but: • Basic Dewar functionality established before focal plate integration. • QUOTA test dewar evaluation tool for detector/CCD controller interplay • Stargrasp contract includes support for controller integration in Tucson.