Examinando por Autor "Zmeev, Dmitry E."

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Design of a system for controlling a levitating sphere in superfluid 3He at extremely low temperatures
(Springer Nature, 2021-10-08) Arrayás, Manuel; Trueba, José Luis; Uriarte, Carlos; Zmeev, Dmitry E.
We present a new mechanical probe to study the properties of superfluid 3He at microkelvin temperatures down to 100 μK. The setup consists of a set of coils for levitating a superconducting sphere and controlling its motion in a wide variety of regimes. In particular, the realisation of motion of a levitating body at a uniform velocity presents both an experimental challenge and a promising direction into the study of the edge states in topological superfluid 3He-B. We include the theoretical study of the device stability and simulations to illustrate the capabilities of the control system.
Progress on Levitating a Sphere in Cryogenic Fluids
(Springer Nature, 2023-02-04) Arrayás, Manuel; Bettsworth, Francis; Haley, Richard P.; Schanen, Roch; Trueba, José Luis; Uriarte, Carlos; Zavjalov, Vladislav; Zmeev, Dmitry E.
We present the working prototype of a levitation system designed for investigation of flows in cryogenic helium fluids. The current device allows the levitation of a superconducting sphere and has several provisions made for allowing precise control over its motion. We report on progress in the detection and control systems of the prototype and demonstrate how uniform circular motion can be implemented.