Accession Number:

ADA091908

Title:

A Near-Surface Burst EMP Driver Package for Neutron-Induced Sources.

Descriptive Note:

Technical rept.,

Corporate Author:

HARRY DIAMOND LABS ADELPHI MD

Personal Author(s):

Report Date:

1980-09-01

Pagination or Media Count:

52.0

Abstract:

This report describes the development of a software package developed for the NEMP computer code, specifying time- and space-dependent drivers produced by neutrons emitted from a near-surface nuclear detonation in the air. Well-chosen functionals were fitted to previously obtained Monte Carlo transport results. The fit was done globally to all volume detectors and time bins together for each driver. Highly efficient minimization algorithms were employed to obtain each fit. Separate drivers for radial and theta Compton currents and for ionization rate were determined for nine source neutron energy bands, for five classes of neutron interaction including 1 neutron direct ionization by elastic recoil and charged particle production, and secondary gamma production by 2 high energy air reactions, 3 low energy air reactions, 4 high energy ground reactions, and 5 low energy ground reactions. Burst height dependence of the drivers was determined. Comparisons with experiment and previous theory are briefly discussed. Typical driver results are presented and discussed. The package allows flexible representation of any nuclear weapon neutron energy spectrum and choice of any burst height in the near-surface regime. Author

Subject Categories:

  • Electromagnetic Pulses

Distribution Statement:

APPROVED FOR PUBLIC RELEASE