M2 Status & Near Term Major Milestones C. Araujo/B. Gressler 1.

M2 Status &

Near Term Major Milestones

C. Araujo/B. Gressler

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M2 Status

Oct 2014: M2 substrate received by Exelis (Harris)

Now in Storage @ Harris waiting for optical processing

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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

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M2 Schedule Summary

Needed at site by Mar 2018 (60 days float)

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M2 Status

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M2 Status

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Optical Fab STE

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Fab equipment

Full tool rotation device

Large bridge profilometer

Small bridge profilometer

Swing Arm Profilometry

Full tool polisher

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Handling Equipment

Vacuum-lifter

Steel support weldment

Support Ring

Full tool rotation device

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M2 processing to begin soon

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M2 Grind and Polish

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Processing up to ion figuring

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M2 Test Set PDR

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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

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M2 Test Set

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Test set modeling CodeV and Zemax

Test Set Hardware

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M2 Cell Design Analysis

• FEA performance to support cell weldment long lead procurement

• Mirror correctability confirmed

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M2 Surrogate Designed

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M2 Cover & Cart previewed

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Pad designs reviewed

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Container mods reviewed

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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

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Near term

• Prepare for M2 FDR in Sept• Includes M2 Controller Design• Optical Fab & Test RR – mid Oct/Nov• Working to update PMCS