Information Page for Kenneth Carpenter
Electromagnetics and Computing Applications
- Ferromagnetic device modeling
- Soft ferrites, as well as other ferromagnetic materials, have applications where their nonlinearities, both static and dynamic, are significant factors in design. Mathematical models have been developed to represent these nonlinearities in circuit design simulations. Experiments have been conducted to verify the models and to obtain parameters needed by them.
Enhancements are needed for the models to cover wider bandwidths of excitation, and measurements are needed on a wider variety of materials.
- High temperature superconductor simulations
- High temperature superconductors (HTSC) can be used, as can conventional superconductors, for shielding, levitation, and lossless conduction. However, the ceramic nature of the HTSC's poses many new problems.
Computer simulations, using finite element solution of partial differential equations, have been carried out to examine effectiveness of shields fabricated in different ways from these materials.
Previous work has assumed magnetostatic conditions. Dynamic simulations are needed to include the effects of eddy currents in the non-superconducting parts of shields.
- Pulsed power circuit design
- Both nonlinear resistive elements and pulse transformers have been simulated, using special purpose codes and using specially modified Spice codes, to aid system designers.
Problems remain in development of general purpose circuit simulation software and better device modeling.
- Dynamic current distribution in conductors
- Full, three-dimensional calculations for current distribution in conductors under pulsed excitation are being carried out.
Approximations via circuit models, and various numerical methods are to be explored.
- Software package development for system simulations
- Coupled electrical and hydrodynamic behaviors of ignition systems have been modeled and simulation software developed and modified.
Additional work on equations-of-state and unified electrical and mechanical modeling of fuze conductors is needed, along with 2 and 3 dimensional simulations.
- Fusion energy
- In the past, work was done with Oak Ridge National Laboratory on the Elmo Bumpy Torus magnetic confinement fusion device, and other projects related to fusion. The work involved experimental magnetic field measurements for diamagnetic diagnostics, MHD calculations, eddy current calculations, and general data analysis.
No work has been done in this area in recent years, but it is still an interest that will be pursued when the opportunity arises.
I no longer have regular office hours. If you need to contact me please send me an email.