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Standardized CCD and MCT detector mounting configurations

Explore the benefits of using Silicon Carbide (SiC) for focal plane baseplates, offering substantial weight savings in detector mounting configurations. SiC's superior material properties make it a viable option, eliminating the need for thermal compensators and flexure mounts.

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Standardized CCD and MCT detector mounting configurations

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  1. Standardized CCD and MCT detector mounting configurations B. C. Bigelow, UM Physics 2/2/05

  2. SiC Focal Plane Concept • Consider SiC for focal plane baseplate • SiC superior to Moly in virtually all material properties • SiC has 5 times the specific stiffness, and 1/3 the density of Moly • Standard detector packages with spring preload mountings allow use of current detector package materials • No thermal compensator / flexure mounts required • Space heritage for SiC material, and optically flat mirrors established • Substantial weight savings for focal plane assembly, bipods, etc. Bruce C. Bigelow -- UM Physics

  3. SiC Focal Plane Concept • Consider SiC for focal plane baseplate Bruce C. Bigelow -- UM Physics

  4. Focal Plane Concept • CTE comparison (courtesy of Pat Jelinsky): Bruce C. Bigelow -- UM Physics

  5. SiC Focal Plane Concept Bruce C. Bigelow -- UM Physics

  6. SiC Focal Plane Concept Bruce C. Bigelow -- UM Physics

  7. SiC Focal Plane Concept • Conclusions • SiC is a viable option for focal plane baseplate • Standardized detector packages are compatible with SiC • Substantial weight savings are possible • Lots more to do if SNAP project is interested in SiC: • Add spectrograph, guider detectors, BITE optics, etc. • Add cold shield, “concentrator” electronics, radiator interface, etc. • Detailed design of baseplate • FEA of baseplate Bruce C. Bigelow -- UM Physics

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