The project list for a shutdown of this magnitude is extremely large.
Listed below are some of the items that were worked during the 2008 Gemini North shutdown in addition to the mirror coating:
- A&G corrective maintenance
- P2 detector problems
- A&G WSOD - network cable
- Looked into noise issues with WFSs
- Jammed cable in AO PA.
- Installed new termination in cable chains. Not needed for SF RT.
- Complete mechanical, optical, and electrical PM done on all 4 modules of the A&G
- SCS worked on Syncrobus problem. Replaced dead fan, and reflective memory in CEM to fix problem.
- Mechanical systems group played a major role in successfully moving the mirror around.
- Serviced the Mirror cell cart replacing o-ring seal.
- Installed invar blocks to mirror to track precisely the position
- Installed and commissioned pilgrim bolt permanent hydraulic installation.
- Performed M1 vs M2 alignment measurements.
- Resealed Mirror covers
- Commissioned new fans for the extraction of harmful vapors.
- Optical Maintenance of GCAL and GMOS.
- Confirmed SF coating is in good shape.
- LSE work - time stabilization board, change mounting screws and coolant lines, cleaned optics and rod assemblies, retrofit 3 controller modules on laser, cut and splice TEC power supply on/off signal pair. Better temperature stability.
- Additional UPS installed and tested.
- Upgrade to summit network storage capabilities
- Upgrade to summit external network connection
- GMOS
- Cleaned
- Slit mask mechanism service
- Omega Temp controller for CCD
- Additional fiber installed for redundancy(all instruments)
- Troubleshoot cassette installed fault. Problem found in sub circuit assembly.
- Investigated loss of index due to GMOS interlock system. Replaced suspect chip
- Vacuum gauge communications converter.
- Clean up cabling
- Science group tour.
- NIRI
- Cryo cooler fault before shutdown was traced to a problem with the controller and not the cold heads. Repaired.
- Cleaned up TE cabling
- Found two loose connections on GNAAC controller. Continued troubleshooting of noise issues.
- Filter exchange on all three wheels.
- Replace bad fan in heat exchanger
- Improve vacuum gauge Communications
- NIFS
- Check and install new power supply to the SDSU controller. Extensive testing will be performed on OI before it is hooked up to the science array.
- Investigate motion of window cover.
- Move boot bar to accommodate new power supply
- Altair
- Assist in synergy board upgrade by burning new EPROM's. Ordered new boards.
- Dry lubricate mounting bolts