NASA SBIR 2008 Solicitation


PROPOSAL NUMBER: 08-1 S2.05-8983
SUBTOPIC TITLE: Optics Manufacturing and Metrology for Telescope Optical Surfaces
PROPOSAL TITLE: Low-stress iridium coatings for thin-shell X-ray telescopes

SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
Reflective X-ray Optics, LLC
1361 Amsterdam Avenue, Suite 3B
New York, NY 10027 - 2589
(212) 678-4932

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
David L Windt
1361 Amsterdam Avenue, Suite 3B
New York, NY 10027 - 2589
(212) 678-4932

Expected Technology Readiness Level (TRL) upon completion of contract: 4 to 5

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
We propose to develop and commercialize a new type of low-stress iridium (Ir) X-ray mirror coating technology that can be used for the construction of high-resolution X-ray telescopes comprising thin-shell mirror substrates, such as the Soft X-ray Telescope (SXT) currently being developed for the Constellation-X mission. The urgent need for low-stress Ir coating technology is driven by the current limitations on telescope angular resolution resulting from substrate distortions caused by conventional reflective Ir coatings that have high stress. In particular, we have measured film stresses in excess of 3 GPa in the case of 30 nm Ir films deposited by conventional magnetron sputtering techniques. The distortions in thin glass mirror shells (such as those suitable for the Constellation-X SXT) resulting from these extremely large coating stresses presently make the largest contribution to the SXT telescope imaging error budget, of order 10 arcsec or more. Consequently, it will be difficult, if not impossible, to meet the imaging requirements of Constellation-X, or other future high-resolution X-ray missions, unless high-quality Ir coatings having significantly lower stresses can be developed. The development of such coatings is precisely the aim of our proposal.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
The low-stress Ir coatings we propose to develop will be suitable for use in the Constellation-X SXT instrument, as well as other future NASA X-ray telescopes comprising thin shell mirror elements.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Low-stress Ir X-ray coatings may also find application in non-NASA applications, such as diagnostic medical and homeland security (i.e., baggage and cargo screening) X-ray imaging.

NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.

Optical & Photonic Materials

Form Generated on 11-24-08 11:56