Accession Number:

ADA109644

Title:

Some Analytic Models for Quasi-Static Source Region EMP: Application to Nuclear Lightning.

Descriptive Note:

Topical rept. 5 Jan-1 Nov 80,

Corporate Author:

R AND D ASSOCIATES MARINA DEL REY CA

Personal Author(s):

Report Date:

1980-11-01

Pagination or Media Count:

58.0

Abstract:

Analytic solutions and numerical results are obtained for three models for quasi-static source region EMP from a nuclear surface burst, representing electron-dominated air conductivity, ion-dominated air conductivity, and an intermediate situation with electron-dominated conductivity at short ranges and ion-dominated conductivity at long ranges. Comparisons are made with the results of previous approximate analyses and with the gross features of lightning strokes which were observed in the 1- to 10-ms time frame on the Mike shot. Uncertainties in air chemistry and ionization rate parameters give rise to roughly or - 50 percent uncertainties in electric field strength and roughly factor-of-three uncertainties in the applicable time frame for each of the above-mentioned models. Within these uncertainties, the EMP predictions appear to be consistent with the gross features of the observed lightning. Author

Subject Categories:

  • Nuclear Weapons
  • Electromagnetic Pulses

Distribution Statement:

APPROVED FOR PUBLIC RELEASE