Numerical Modelization and Optimization of Flux Compression Experiments
Abstract
This paper will present the advantages of using a flux compression scheme to amplify the power in High Pulsed Power (HPP) generators in order to produce quasi isentropic magnetic pressure ramps with maximum pressure as high as possible. Our field of interest are pressures in the range of several Mbars. For quasi isentropic compression above 1 Mbar, the main advantage of the flux compression is to give considerable freedom to shape the current waveform and thus the magnetic pressure waveform. The optimizations of the shape of this magnetic pressure waveform are performed using improved 0D codes. Some physical models have been added to the initial 0D circuit code to reproduce the experimental results obtained on HPP generators using flux compression. Moreover, a simple hydrodynamic model is used to determine the isentropicity of the compression in a given material. We will present some comparisons between experimental results obtained on the `` Z " generator at Sandia National Laboratories and our models. We will also give potential improvement of those results based on further flux compression parameters optimization in order to have a better shape of the current waveform.
- Publication:
-
APS Shock Compression of Condensed Matter Meeting Abstracts
- Pub Date:
- June 2001
- Bibcode:
- 2001APS..SHK.J4006L