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Figure 6g – Mirror Construction Detail

Ball Rollers: 5 pairs of ball rollers support the lower inflated dome. The ball rollers share the task of supporting the sphere with the polar arms, and provide additional stability and damping. Each ball roller consists of a 1 inch metal ball which is fitted into a housing. The 1 inch ball rolls on ball bearings, and provides a low friction support of the lower inflatable dome.

Prototype Testing and Results

Summary of Test Results

Prototype testing has been accomplished to satisfy the Project Goals. Figure 9a through 9f illustrate photographic and tabular results of the prototype testing. The following is a summary of testing done and the results – further detail on each item is provided in the sections that follow.

With respect to goal 3 of the Project Goals, the prototype tests indicate that the heliostat pointing system does accurately aim the heliostat without distorting the reflective surface.

With respect to goal 4 of the Project Goals, a good near-circular beam shape was achieved on the simulated target; and geometric concentration ratios of up to 8.7 were achieved using differential

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November 24, 2002

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