CONTENTS Page I. INTRODUCTION..................................................................................................................... 1 II. EMISSION MODELS.............................................................................................................. 5 A. COTV Ion Engine Exhaust................................................. 6 B. POTV Chemical Engine Exhaust... ...................... 9 III. ARGON ION ENGINE EXHAUST IN MAGNETOSPHERE...................................................... 15 A. Argon Ion Precipitation near LEO.......................... 16 B. Beam-Magnetosphere Interactions............................................................ 17 C. Further Fate of Argon Ions....................................................................... 33 IV. MAGNETOSPHERIC EFFECTS OF ARGON PLASMA EXHAUST........................................ 35 A. Artificial Airglow............................ 35 B. Artificial Ionospheric Current............................... 41 C. Thermospheric Heating............................ 43 D. Plasmaspheric Heating........... .. ................................... ............... 45 E. Ring Current Modification..................... 49 F. Radiation Belt Modif ication....................................................... 54 G. Plasma Turbulence and Space Communications............................. 58 V. CHEMICAL ENGINE EXHAUST IN MAGNETOSPHERE..................................................... 65 A. Reduction of Ring Current Activity.................. .................................. 65 B. Intensification of Geocorona........................................................... 72 VI. CO-ORDINATION WITH EXPERIMENTS............................................................................ 75 VII. SUMMARY OF MAGNETOSPHERIC EFFECTS..................................................................... 79 VIII. RECOMMENDATIONS............................................................................................................... 83 IX. REFERENCES.......................................................................................................................... 87 X. FIGURE CAPTIONS.................... 91 XI. APPENDIX: MAGNETOSPHERE ....................................................................................... A-1 iii
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