Theoretical Studies of SGEMP Field Generation.
Final rept. Nov 73-Nov 74,
SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CALIF
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Analytic models of the generation of IEMP in cavities at pressures below 1 torr and external to conducting objects in free space are developed. A series of computer codes devised to extend the analytic approach to more complex situations is presented. Four areas of research are identified 1 the effect of small conducting or dielectric objects on the potential distribution in a cavity in which space charge exists 2 the development of an analytic method to treat space-charge dynamics before the onset of space-charge-limiting of a nonmonoenergetic current beam 3 the formation and time-dependent behavior of a plasma sheath outside a planar, cylindrical or spherical conductor 4 the conditions for pinching to occur in a finite cavity. Numerical examples of each of the four topics are presented. Finally, the dynamics of a heavily space-charge-limited current in the SPI beam injection facility is examined with the electrostatic particle code.
- Plasma Physics and Magnetohydrodynamics