title: Dynamic behavior of a liquid metal interface under the influence of a high-frequency magnetic field.
abstract: We present experimental results on the stability of a free liquid metal surface influenced by an alternating magnetic field. The field is generated by an inductor fed by a high-frequency electrical current. The experimental setup consists of an annulus filled with the liquid metal galinstan. We observe three kinds of instabilities: exciting of capillary waves, a static high-amplitude surface deformation, and eventually an electromagnetic pinch at a critical inductor current I(cp). The data show that I(cp) correlates directly with the current frequency and the geometric parameters.
authors.affiliation: Department for Electrical Engineering, Technische Universität Ilmenau P.O. Box 100565, 98684 Ilmenau, Germany.
authors.forename: Jens-Uwe
authors.initials: JU
authors.lastname: Mohring
authors.forename: Christian
authors.initials: C
authors.lastname: Karcher
authors.forename: Dietmar
authors.initials: D
authors.lastname: Schulze