TRANSIENT ELECTROMAGNETIC FIELD PROPAGATION THROUGH INFINITE SHEETS, INTO SPHERICAL SHELLS, AND INTO HOLLOW CYLINDERS
Gaussian- electromagnetic field pulses of several durations are propagated through infinite sheets, into the interior of hollow cylinders, and into the interior of spherical shells. The plates, spheres, and cylinders contain no slots. The time history of the propagated pulses is computed. Finally, the field is calculated in the interior of a cylinder of finite length when connected at its ends by wire to a generator delivering a current pulse of gaussian shape. The dimensions of the cavities are assumed to be sufficiently small that resonances are not excited by the highest significant frequency contained in the shortest pulse considered. The numerical study is restricted to thin-walled aluminum shields 1/32, 1/16, 1/8, and 1/4 inch thick. The half- amplitude widths of the pulses employed lie in the range 14 to 2400 mu s. It is shown that gaussian pulse electric fields defined on the surface of the plates and cylinders are propagated with little diminution in amplitude. When the incident pulse undergoes reflection at the boundary surface as well as transmission through the metal wall, the total attenuation sustained by the field is great. Thin spherical shells form effective magnetic shields. The electric field is small in the interior of thin-walled cylinders carrying extremely large transient currents. (auth)
- Research Organization:
- Sandia Corp., Albuquerque, N. Mex.
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- AT(29-1)-789
- NSA Number:
- NSA-17-024054
- OSTI ID:
- 4720527
- Report Number(s):
- SCR-623
- Country of Publication:
- United States
- Language:
- English
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