Early Time Coupling Studies Using a 1D Hybrid Code.
Abstract
The results of simulations of very early time HANE(High Altitude Nuclear Explosion) processes (i.e, + or = 1/0mega sub i) using a 1D hybrid code are presented. The purpose of this work is to elucidate important physical phenomena which occur rather than to perform actual early time simulations of a HANE. The focus of this study is primarily on coupling mechanisms. We find that there is no 'single' coupling mechanism but that several mechanisms can be effective at various times throughout the debris expansion phase: turbulent coupling, laminar pick-up, and Larmor coupling, Another important result of this study is the generation of very energetic ions. This is caused by the laminar electric field at the leading edge of the magnetic pulse. A fraction of the debris ions can be accelerated up to roughly three times the initial debris expansion velocity (i.e., V sub M approximately 3V sub d). It is well-known that the initial formation of ion debris patches occurs on a time scale faster than that calculated from the initial expansion velocity. Thus, the observation of accelerated debris ions in the simulations is consistent with HANE data. Keywords: Early time coupling, 1D hybrid simulations, Ion-ion interactions, Ion energization.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 29, 1985
- Accession Number
- ADA155587
Entities
People
- C. Goodrich
- Konbtantinopsa Dennis Papadopoulos
Organizations
- United States Naval Research Laboratory