Electromagnetic Pulse Environment Studies. Volume II. Late-Time High-Altitude Electromagnetic Pulse Code Development.
Abstract
Late-time, two-dimensional, high-altitude, EMP field calculations were carried out using the HAPS field code. The objective of this effort was to determine effects which result from gamma rays scattered into the direct beam and possible effects from neutron sources. Direct-beam gamma sources were curve fit for comparison purposes. Comparisons showing the field enhancement are presented. Significant fields near the ground at 100 microseconds from a 20-km burst height by including neutrons were obtained. An estimate of neutron effects from a 100-km burst height resulted in fields near the ground of several volts at 1.5 milliseconds. A causality study showed perturbations travel across the two-dimensional HAPS grid in very nearly the correct transit time. A one-dimensional plane code was developed to solve a class of high-altitude EMP problems. The code compares at early times to one-dimensional codes. Field equations and air chemistry models are discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1974
- Accession Number
- ADA000944
Entities
People
- James A. Marks
- Vernon W. Pine