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2
M2 Status
Oct 2014: M2 substrate received by Exelis (Harris)
Now in Storage @ Harris waiting for optical processing
3
2015 - Upcoming Reviews
MayOptical Fab. STE design Cell Assy Fab. Readiness / Cell weldment design
JulyOptical Fabrication & Test Readiness - Part1Shipping container modifications/packagingSupport Pad Design & Testing Cell Assembly Handling Equipment (M2 cart and cover)
SeptemberCell Assy final Design Mirror control system Finished M2/cell Assy integration & test readiness
NovemberOptical Fab & test readiness - polish
7
Optical Fab STE
7
Fab equipment
Full tool rotation device
Large bridge profilometer
Small bridge profilometer
Swing Arm Profilometry
Full tool polisher
12
M2 Test Set PDR
12
Reduces stitching errors due to high frequency discontinuities between CGHs.
Single CGH 28”x28” (MHAT)
Collimator 40” CA
larger test aperture allows the entire CA of M2 to be measured as a single zone
shorter collimator height will enable the M2 to be tested with a lower ceiling height
3m
New Design •Mount M2 in stationary frame •Rotate interferometric test set components
14
M2 Cell Design Analysis
• FEA performance to support cell weldment long lead procurement
• Mirror correctability confirmed
19
M2 Issues
• LSST producing ILCs to enable testing of M2 actuators• M2 lifting fixture vs spreader bar• Final details of witness samples for pull tests• Action items from M2 cart design review• Shipping container mods