SPS Feasability Study SD76SA0239-2

surface of a centrally located floor. The mirror blankets are processed on the lower surface of the same centrally located floor. Initially a catenary and load-gathering tape assembly is located on the electrostatic tables. The 25-meter-wide solar blanket ends are aligned and attached to the tapes. The first unit length of roll-to-roll bonding is accomplished. The 3-meter by 600-meter tow bars are attached to the catenary end of the load transition tapes, 50 meters on centers, at positions that match the SPS structure. The load transition tapes also provide the electrical path to the 50-meter spaced bus points. Similarly, the mirror blankets (also 25 meters wide) are assembled and attached to two-bars. The solar blankets and mirrors deploy from each side of the blanket fabrication facility as shown in Figure 3.3-3. The mirrors are nearest the trough and are the first to be lowered into position. The solar-cell blankets are next moved into position. The tow bars are designed to permit two-man, radiation hardened, teleoperator-equipped tribeam scooters (Figure 3.3-4) to be used inside the tow bars to transfer blankets from the tow bars to the SPS attachments. Solar blankets are attached to load-cell high-voltage insulators and the mirrors are attached to uninsulated load cells every 50 meters along SPS longerons at the column reinforcement points. Fully-installed and partially-installed blanket assemblies are shown in Figure 3.3-5. 3.4 ROTARY-JOINT, SLIP-RING STRUCTURE, AND ELECTRICAL TRACK BUILDUP The rotary-joint consists of the use of the SPS hexagonal frame as a base upon which the inner slip-ring structure and track structure is mounted, Figure 3.4-1. The electrical tracks are mounted on premolded insulator Figure 3.3-3. Film Deployment Concept Cable System