K
Karl H. Spatschek
Researcher at University of Düsseldorf
Publications - 206
Citations - 4012
Karl H. Spatschek is an academic researcher from University of Düsseldorf. The author has contributed to research in topics: Nonlinear system & Magnetic field. The author has an hindex of 32, co-authored 205 publications receiving 3831 citations. Previous affiliations of Karl H. Spatschek include Forschungszentrum Jülich & Ruhr University Bochum.
Papers
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Evolution theorem for a class of perturbed envelope soliton solutions
TL;DR: In this paper, the evolution of envelope solitons in the presence of perturbations is discussed in terms of the functional behavior of N(η2), where η2 is the nonlinear frequency shift.
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Nonlinear convective motion in plasmas
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Growth rates of bending KdV solitons
E. W. Laedke,Karl H. Spatschek +1 more
TL;DR: In this article, the authors derived variational principles for the maximum growth rate γ as a function of the transverse wavenumber k of the perturbations, and obtained very close upper and lower bounds for the γ(k) curve.
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Change of the magnetic-field topology by an ergodic divertor and the effect on the plasma structure and transport.
M. W. Jakubowski,Oliver Schmitz,Sadrilla S. Abdullaev,S. Brezinsek,K.H. Finken,A. Krämer-Flecken,Michael Lehnen,U. Samm,Karl H. Spatschek,B. Unterberg,R. C. Wolf +10 more
TL;DR: It is shown that this vacuum approximation predicts in many details the experimentally observed plasma structure, defined mostly by the magnetic topology of the perturbed volume.
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Stability of discrete solitons and quasicollapse to intrinsically localized modes.
TL;DR: In this article, an analytical stability criterion for discrete solitons is presented and its evaluation proves that discreteness reduces the critical nonlinearity parameter, which separates stable and unstable regimes.