SiC-Based Laser Fusion Optics

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG03-01ER83279
Agency Tracking Number: 65542S01-II
Amount: $750,000.00
Phase: Phase II
Program: SBIR
Awards Year: 2002
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
7960 South Kolb Road, Tucson, AZ, 85706
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 W. Kowbel
 (520) 574-1980
Business Contact
 J. Withers
Title: 65542
Phone: (520) 574-1980
Research Institution
65542 Silicon-carbide-based mirrors are essential if inertial fusion energy is to become practical. Current SiC mirror technologies suffer from several shortcomings including high areal density, impurities, low stiffness, and core/base print-through which has precluded producing acceptable SiC mirrors. This project will develop a hybrid SiC-SiC composite/SiC foam approach to address these limitations. The use of the composite core will provide high thermal conductivity, very high modulus/stiffness, high fracture toughness, and a pure ¿-SiC structure. The SiC foam will eliminate the print-through problem. During Phase I, a 4-inch diameter SiC mirror was fabricated that exhibited less than 10 kg/m2 areal density. The core print-through was eliminated, and a very good microroughness of 4 nm was achieved. Phase II will scale-up processing to 18-inch diameter SiC optics suitable for Inertial Fusion Energy optics. Final polishing techniques will be developed to achieve a flatness under 150 nm combined with 2 nm microroughness. An improved aluminum coating method will be developed to achieve an adherent coating layer that will survive pulse laser testing. Commercial Applications and Other Benefits as described by the awardee: Commercial applications should include space optics, such as lidars and cross-link communication, and ground based applications including high energy lasers

* Information listed above is at the time of submission. *

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