Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

1 Publication
Can we look inside a dynamo?
Stefani, F.; Gerbeth, G.;
For mean-field dynamos, we investigate the possibility of determining the radial dependence of alpha which is assumed to be spherically symmetric. Growth rates for magnetic field spherical harmonics with different orders l are supposed to be known by measurement.
An evolutionary strategy (ES) is used for the solution of the inverse problem. Numerically, we find quite different solutions giving nearly the same eigenvalues. The ES is also applied to find functions alpha(r) yielding zero growth rates for the lowest four l-modes. Additionally, a slight modification of the ES is utilized for an ''energetic'' optimization. The consequences of our findings for inverse dynamo theory and for the design of future dynamo experiments are discussed.
  • Astronomische Nachrichten (2000) 235-248

Publ.-Id: 3436 - Permalink