This book contains the lectures presented at the Advanced Study Institute, 'Earth's Particles and Fields, 1969', which was held at the University of California, Santa Barbara, during the period August 4 through 15, 1969. One hundred seventy persons from twelve different countries attended the Institute. The authors and the publisher have made a special effort for rapid publication of an up-to-date status of the particles and fields in the earth's magnetosphere, which is an ever changing research area. Special thanks are due to the lecturers for their diligent preparation and excellent presentations. The individual lectures and the published papers were deliberately limited; the author's cooperation in conforming to these specifications is greatly appreciated. The contents of the book are organized by subject area rather than in the order in which papers were presented during the Institute. Many thanks are due to Drs. Kinsey Anderson, Sam Bame, Leverett Davis, Gilbert Mead, Harry Elliot, Kenneth Behannon, Reimar Lust, A. W. Schardt, Carl-Gunne Eilthammar, and Martin Walt who served as session chairmen during the Institute and contributed greatly to its success by skillfully directing the discussion period in a stimulating manner after each lecture. Dr. Martin Walt and the Summary Panel worked hard to prepare an excellent summary of various aspects of particles and fields in the magnetosphere at the end of the Institute.

Proceedings of a Symposium organized by the Summer Advanced Study Institute, held at the University of California, Santa Barbara, Calif., August 4-15, 1969

Inhalt
I: Magnetospheric Models.- Entry of Solar Cosmic Rays Into the Earth's Magnetosphere.- Formation and Geometry of Geomagnetic Tail.- Magnetotail Plasma and Magnetospheric Substorms.- A Model Current System for the Magnetospheric Substorm.- On the Origin of Radiation Belt and Auroral Primary Ions.- Mathematical Models of Magnetospheric Convection and Its Coupling to the Ionosphere.- II: The Bow Shock.- Solar Wind Stimulation of the Magnetosphere.- Shock Waves in the Solar Wind.- Hydromagnetic Observations in the Solar Wind.- Plasma Measurements Near the Earth's Bow Shock: Vela 4.- AC Electric and Magnetic Fields and Collisionless Shock Structures.- III: Magnetospheric Particles.- Energetic Particle Phenomena in the Earth's Magnetospheric Tail.- Anisotropic Distributions of Energetic Electrons in the Earth's Magnetotail and Magnetosheath.- Trapped and Polar Particles During the June 9, 1968 Magnetic Storm.- Solar Particle Observations Over the Polar Caps.- The Reaction of the Plasmapause to Varying Magnetic Activity.- IV: Magnetic and Electric Fields in the Magnetosphere.- Magnetic Fields in the Earth's Tail.- Magnetic Field Observations in High ? Regions of the Magnetosphere.- Fluctuations in the Distant Geomagnetic Field During Substorms: ATS 1.- AC Magnetic Fields.- Electric Fields in the Ionosphere and Magnetosphere.- Auroral and Polar Cap Electric Fields from Barium Releases.- Satellite Measurements of DC Electric Fields in the Ionosphere.- Variations in Electric Fields from Polar Orbiting Satellites.- V: Wave-Particle Interactions.- High Frequency Electrostatic Waves in the Magnetosphere.- Mutually Interacting Instabilities in the Magnetosphere.- AC Fields and Wave Particle Interactions.- Hydromagnetic Waves and Instabilities in the Magnetosphere.- Intensity of Discrete VLF Emissions.- VI: Radiation Belt Observations.- Summary of Particle Populations in the Magnetosphere.- Further Comments Concerning Low Energy Charged Particle Distributions Within the Earth's Magnetosphere and Its Environs.- The Origin and Distribution of Energetic Electrons in the Van Allen Radiation Belts.- Recent Measurements of Inner Belt Protons.- Alpha Particles Trapped in the Earth's Magnetic Field.- Measurements of Trapped ?-Particles: 2?L?4.5.- VII: Acceleration and Motion of Particles.- Introductory Survey of Radiation Belt Diffusion.- Trapped Protons ?100 KeV and Possible Sources.- Radial Diffusion of Trapped Particles.- On the Balance Between Radial and Pitch Angle Diffusion.- VIII: Summary.- Panel Report.- Conclusions.- Appendix I: Glossary.- Index of Subjects.