1. COR1 Status – July 2001 Joseph M. Davila (GSFC) O. C. St. Cyr (CUA)

2. Current Issues Scattered light testing of BB2 Increase Exposure time Reduce contamination during assembly Objective lens erosion testing

3. COR1 breadboard in HAO tunnel -- March 2001 Breadboard Instrument

4. COR1 Occulter

5. COR1 BB2 Scattered Light Bright Ring Bars

6. Scattered Light Measurements from BB2

7. Approaches to shorten exposure time Understand and remove bright ring Decrease bandpass from 1000 A to approximately 100 A Use a neutral density filter Focal plane occulter Add images on board

8. Reduce Contamination of Objective Lens Pre-align mechanical parts to minimize objective exposure Dust cover for objective during assembly Assembly moved to cleaner, dedicated clean room

9. Erosion Test at Duke Facility Samples prepared and exposed Awaiting BTDF testing Complete by 30 July

10. Interface: Door to COR-1 View from Front View from Rear Door Hinge & Mount Tube 1 Door Interface Structure Objective Lens + Mount Aperture Selector Blade Door INTERFERENCE Aperture Selector Motor Inside M. Hersh 061901