Controlling Josephson dynamics by strong microwave fields

Ratchetlike dynamics of fluxons in annular Josephson junctions driven by biharmonic microwave fields.

Experimental observation of the unidirectional motion of a topological soliton driven by a biharmonic ac force of zero mean is reported. The observation is made by measuring the current-voltage characteristics for a fluxon trapped in an annular Josephson junction that was placed into a microwave field. The dependence of the fluxon mean velocity at zero dc bias versus the phase shift between the...

Josephson flux-flow oscillators in nonuniform microwave fields

Phase locking and flux-flow resonances in Josephson oscillators driven by homogeneous microwave fields

Plasma dynamics in pulsed strong magnetic fields

Recent investigations of the interaction of fast-rising magnetic fields with multi-species plasmas at densities of 10– 10 cm are described. The configurations studied are planar or coaxial interelectrode gaps pre-filled with plasmas, known as plasma opening switches. The diagnostics are based on time-dependent, spatially resolved spectroscopic observations. Three-dimensional spatial resolution ...

Excitation mechanisms for hydrogen atoms in strong microwave fields

We analyse the excitation mechanisms which determine the dynamics of highly excited hydrogen atoms traversing a wavegulde. Experimental measurements to verify predictions denved from Floquet theory are suggested.