COR1 Status – July 2001

Joseph M. Davila (GSFC)O. C. St. Cyr (CUA)

Current Issues

• Scattered light testing of BB2• Increase Exposure time• Reduce contamination during

assembly• Objective lens erosion testing

COR1 breadboard in HAO tunnel -- March 2001

Breadboard Instrument

COR1 Occulter

COR1 BB2 Scattered Light

Bright Ring

Bars

Scattered Light Measurements from BB2

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

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

Erosion Test at Duke Facility

•Samples prepared and exposed

•Awaiting BTDF testing

•Complete by 30 July

Interface: Door to COR-1View from Front

View from Rear

Door Hinge & Mount

Tube 1Door Interface Structure

Objective Lens + Mount

Aperture Selector Blade

Door

INTERFERENCE

Aperture Selector Motor Inside

M. Hersh 061901