TABLE 22 KEY STUDY AREAS IN SOLAR ENERGY CONVERSION GROUP 1 Item Issue No. Work Areas Objective 1 1 Cell Quantum Efficiency Increase (lsc 34->42mA/cm2) 2 2 Cell Fabrication Cost Reduction ($1.00/cm2^0.01/cm2) 3 3 Cell Thickness (Weight) Reduction (8 mil -> 2-mil) 4 3 Ultra Light-weight Blanket Design (70->430 W/lb) 5 5 Concentration Ratio Optimization (N = HN = 4) 6 5 Concentrator Filter Design (Minimize temperature) 7 6 High-Voltage Plasma Protection (40 kV capability) 8 8 High-Voltage Switching (40 kV capability) GROUP II 1 1 Cell Voltage Increase (Voc 540~>780mV) 2 2 Semiconductor Material Cost Reduction (12^/cm2-*0.2^/cm2) 3 4 Blanket Cost Reduction ($2.50/cm2-*$0.015/cm2) 4 6 Improved Radiation Resistance (12% deg. in 2 yearr>6% in 5 years) 5 6 Reduction of Thermal Cycle Fatigue (5 years-^30 years life) 6 8 Optimized Cell Layout and Bus Design (Use cells for busing) GROUP III 1 1 Cell Design Optimization (GaAs, VMJ, other) 2 5 Concentrator Cost Reduction (1/10 of Blanket Cost) 3 6 Minimized Meteorite Loss 4 8 Minimized Magnetic Moments (Layout with balance) 5 8 Minimized Busing Losses (Structure used as bus) 6 8 High Level DC Power Distribution (Conventional versus superconductor) GROUP IV 1 7 Reduced Energy Requirements of Processes (< 1 year energy pay back) 2 8 Power Control and Circuit Protection (Shut down and repair) 3 9 In Orbit Assembly Concepts for Array (Mechanized assembly) 4 9 In Orbit Repair or Replacement of Array (Easy replacement) 5 9 Magnetic Attitude Control (Layout control circuits)
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