Alternate Implosion Models for the Plane Parallel Diode.
Abstract
The evolution of imploding Z-pinch plasmas in a place parallel diode is modeled in two ways through the computer code ZDIPR, described here. The first consists in a complete electromagnetic field solution via the appropriate Hertz vector potential, combined with a radiation coupled hydrodynamic solution of the Braginskii fluid equations. The second, in an approximate electrodiffusive solution for the axial electric field, combined with the radiation coupled hydrodynamic model. The hydrodynamic solution is effected by an implicit advance of ion temperature, electron temperature plus chemical potential, and (in the electrodiffusive limit) the axial electric field. This is subcycled under the control of either a predictor/corrector or fully implicit advance of the radial fluid velocity and Lagrangian position coordinate. Radiation transport is calculated by probability of escape algorithms operating on a preselected set of frequency domains. The elcetromagnetic field advance is effected through wave equation quadrature (for Z and derivative sub tZ) followed by a numerical differentiation of this potential (smoothly interpolated to the fluid mesh) which provides E sub Z and B sub theta.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 02, 1982
- Accession Number
- ADA131275
Entities
People
- Robert E. Terry