文档介绍：MODELING FERRITE IC RESPONSE IN THE TIME-DOMAIN *
J. Johnson, J. F. DeFord, and G. D. Craig
Lawrence Livermore National Laboratory
Livermore, CA 94550
Abstract does not change significantly over a distance on the order of
lo5 lattice spacings (e lo-’ cm), then the exchange energy
The behavior of ferrite monly found in induction
density is indeed pared to the ic energy
accelerators has import ant consequences for the performance of
density. (This is a consequence of the short-range nature of
these accelerators. Previous work by the authors on modeling
exchange: a given dipole interacts via the exchange interac-
the ic fields in induction cavities has focussed
tion only with its nearest neighbors, whereas the same dipole
upon use of a simple, phenomenological model for the process
interacts ically with every other dipole in the sample.)
of ization reversal in these ferrite loads. In this paper
Thus, the assumption that exchange may be neglected can be
we consider a model for ization reversal which is more
seen as equivalent to the assumption that throughout the re-
deeply rooted in theory, and present a simulation of the reversal
versal process, the ization remains a gradually varying
process based upon this model for an idealized set of boundary
function of posit ion.
conditions.
Consider a rigid, cubic lattic