Photogrammetry Review Raphael Goudard Visit Nov 27 – Nov 30

Suggested Activities Intro to NCSX Project / Assembly Sequence –Brown movies and models –Photogrammetry use on current phase –Measure and compare to our files –Offer suggestion of how photogrammetry can be used to rack and align coils Photogrammetry use on future phase –MCHP (3 coil Half Period), FP (Field period) and final assembly –Lock in on machine as we assemble layers (Mod coils, TF coils, PF Coils, Cryostat) Specifics of Aicon System –Reverse Engineering –Deflection analysis –Import/export –pre/post processing –How to avoid Wendelstein processing time (when does it bog down) –Reuse of coded target numbers –Is he familiar with GSI V-Star system?

Debrief Arrived Monday – gave brief tour Tuesday – Set up targets on A1 9:30 – 10:30 Took a lot of time to ream holes for new photogrammetry targets –10:30 – 11:30 took first project: set of 200 pictures Verify A1 scan with laser tracker (.060 mm) –Placed B1 on A1 then took second set of 200 photos and learned that B1 did not distort A1. (.070 mm) –During lunch B1 was removed then took third set of photos after lunch and verified the A1 still was stable (.060 mm)

Debrief Wednesday – Set up targets on B3 which had just completed racking and measuring –Took pictures to characterize coil (.050 mm) –Unracked coil using dial indicators took photos and whiskers showed that coil moved exactly as dial indicators. Analyzed data using best fit as well deformation analysis (.090 mm) Realigned wedge to itself before and after and could identify deformation vs. translation (.180 mm) –We then tried to rerack the coil by restoring the dial indicators. –The detection of this movement was much easier and obvious with photogrammetry –We validated this movement by checking a couple of point with the laser tracker.

Debrief Thursday – Validated LT measurements and Steve operated software personally and reran Monday’s data from the beginning to the end. Photogrammetry has validated that the laser tracker measurements to date are valid. Best fits of Photogrammetry to LT are within (.060 mm)