Space Solar Power Review Vol 1 Num 4 1980

Cover	1
Table of Contents	148
Editors List	2
Editorial by John W Freeman	3
Letters to the Editor	5
Changes in the Terrestrial Atmosphere-Ionosphere-Megnetosphere System Due to Ion Propulsion for SPS Placement	9
Abstract	9
1. Introduction	9
2. Vehicle and Orbit Description	10
3. Ion Beam Dynamics and Ion Lifetimes in the Plasmasphere	11
4. Possible Environmental Impace: Communications	13
A. Communications Effects Due to Plasmasphere Perturbations	13
B. Communications Effects Due to Outer Magnetosphere Perturbations	17
5. Summary and Conclusions	17
References	19
Extraction of Oxygen and Metals from Lunar Ores	21
Abstract	21
1. Introduction	21
2. Lunar Environment	22
3. Lunar Ore	22
4. Review of Lunar Extraction Processes	22
5. Proposed Process	24
6. Bipolar Electrolytic Cells	25
7. Electrolyte Purification and Recycling System	26
8. Purification of Aluminum Alloy	27
References	27
S-Band Microwave Genreation with Spherical Gyrocons	29
Abstract	29
1. The Spherical Gyrocon	29
2. Simulation Results	32
3. Potential Problems and Improvement	33
4. Conclusions	37
References	37
Automated Beam Builder Update	39
Abstract	39
1. Introduction	39
2. Aluminum Beam Builder	40
Design and Development	40
Beam Cap Forming	40
Brace Storage, Dispensing and Transporting	40
Fastening Beam Components	43
Beam Cat-off	44
Manufacture and Test	46
Beam Cap Roll Forming Machinery	46
Brace Dispensing Mechanisms	47
Control Devices	47
3. Composite Beam Builder	50
Beam Cap Processing Development	50
Fastening of Composite Beam Components	51
Induction Weld	53
Material Evaluation	53
4. Conclusion	55
References	56
Laser-SPS Systems Analysis and Environmental Impace Assessment	57
Abstract	57
Introduction	57
Concept Definition	58
Evaluation of Electric-Discharge Lasers	58
Transmitting Optics	62
Atmospheric Transmission	63
Receptor Concepts	67
System Chain Efficiencies	69
Ancillary Issues	71
Laser Beam Spreading	71
Safety and Security	75
Laser-SPS Mass Estimate	77
Environmental Impact Assessment	77
Heating of the Atmosphere	77
Environmental Impact on Wildlife	80
Laser-Plasma Interactions in the Ionosphere	80
Perturbation of the Plasma Chemistry of the Mesosphere and Thermosphere	80
Summary and Conclusions	82
References	83
SPS Design with Solid-State Transmitter	85
SPS For Europe	91
Abstract	91
Introduction	91
Particular Aspects Concerning SPS Application to Western Europe	91
Programme Recommendations for European SPS Activities	96
Conclusion	99
References	100
Workshop of the Mw Power Transmission System for the SPS Review Panel Report	101
Abstract	101
1. Introduction	101
2. Summary of the Reference System	102
3. General Conclusions	102
4. Beam Forming and Control	104
The Reference System	104
Alternative Phase and Control Systems	104
Separation of Steering and Phase Control	105
Phase and Amplitude Error Estimation	105
Ear Sidelobes	105
Beam Taper	106
Lattice Design	106
Miscellaneous Items	107
5. Microwave Amplifiers	107
Noise and Harmonics	107
Solid-State Testing	108
Magnetrons	108
Klystron Cooling	108
Device Efficiency	108
GBED Recommendations	109
6. Radiating Elements	109
Materials	109
Multipacting	109
Testing	109
Harmonics	110
7. Rectenna	110
Harmonics	110
Weather Protection	110
Element Lattice Design	110
Cost Effectiveness	111
8. Summary	111
A Report of the Meeting on SPS in Bombay Held at the Bombay Gymkhana on August 9 1979	113
Recent Developments in the Space Transportation System for the SPS	115
Abstract	115
Report on the International Symposium on SPS Held in Toulouse France June 1980	123
Meeting Announcements	129
News	130
Pending Legislation on SPS	130
Studies of SPS Nearing Completion	131
News Item on Astronautics Magazine Article	134
List of Contents and Author Index 1980	135

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