Space Power Volume 9 Number 1 1990

Cover	1
Editors Page	2
Table of Contents	3
Editorial	4
Indium Phosphide Solar Cells - Recent Developments and Estimated Performance in Space by Weinberg & Brinker	5
Summary	5
Introduction	5
Background	6
Cell Research and Development	6
Performance in Space	10
1. The LIPS III Flight Experiment	10
2. Estimated Performance in Space	11
Conclusion	14
References	15
Advanced Heat Pipe Technology for Space Heat Transport and Rejection Technologies by Eastman, Ernst, Shauback and Toth	17
High Evaporator Power Density	17
High Axial Heat Transport Rates	21
Pumped Two-phase Heat Exchanger	23
Start-Up of Liquid Metal Heat Pipes	24
New Materials	25
Space-related Applications	26
Applications	27
References	27
European Regenerative Fuel Cell Technology for Space Use by Baron, Philippi and Tillmetz	29
Summary	29
Introduction	29
System Description	30
Principles of Operation	30
Immobile KOH System	31
PEM System	31
Mixed System	32
Mobile System	33
Performance Comparison	33
System Mass Comparison	36
Operational Behavior Comparison	36
Comparison with Other Accumulators	38
Conclusion	39
References	39
Nonterrestrial Materials for Space Solar Power Projects by Gregg Maryniak	41
Summary	41
International Interest	42
The Use of Nonterrestrial Materials for Solar Power Satellites	43
Additional Research Directions	47
References	48
Advanced Radioisotope Space Power Systems by Turi and Carpenter	51
Summary	59
Summary	51
Introduction	51
General Purpose Heat Source RTGs	52
CRAF/Cassini	54
Future RTG Missions	55
Dynamic Isotope Power System	57
Summary	58
Space Nuclear Reactor Shields for Manned and Unmanned Applications by McKissock and Bloomfield	59
Summary	59
Introduction	59
Thickness Algorithms	60
Geometry Considerations	60
Unmanned Missions	62
Manned Missions	62
Summary of Results	66
References	66
Pulsed Laser Propulsion for Low-cost High-volume Launch to Orbit by Jordan Kare	69
Summary	69
Introduction	69
Properties of a Ground-to-orbit Launcher	71
Launcher Cost and Scaling	71
Applications	73
Uses for a Sub-scale Laser Facility	74
Status of Laser Propulsion Research	75
Program for Laser Propulsion	76
Conclusions	76
Acknowledgements	77
References	77
Safety and Environmental Analyses for Space Nuclear Programs by DJ McDonnell	79
The Environmental Impact Statement (EIS)	79
Safety Analysis: source of the data	80
Implementing the Process	85
The Galileo and Ulysses EIS (Tier-1)	85
VEEGA Trajectory: Earth avoidance analysis	86
Galileo Mission Tier-2 EIS	86
Lessons Learned	89
Acknowledgements	90
References	90
Fundamental Concepts for Real-time Spacecraft Power Distribution Control by Sheble, Nelms and Grigsby	91
Summary	91
Introduction	91
Operating Modes	92
Terrestrial Energy Management System	93
Basic Structure	93
Hardware Implementation	95
Software Implementation	96
Summary	97
Acknowledgements	97
Refreencs	97
Back Cover Contents	100

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