Arrayás, ManuelTrueba, José LuisUriarte, CarlosZmeev, Dmitry E.2025-01-092025-01-092021-10-08Arrayás, M., Trueba, J.L., Uriarte, C. et al. Design of a system for controlling a levitating sphere in superfluid 3He at extremely low temperatures. Sci Rep 11, 20069 (2021). https://doi.org/10.1038/s41598-021-99316-72045-2322 (online)https://hdl.handle.net/10115/53137We 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.enAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/Levitating sphereSuperconductorSuperfluid 3HeStabilityControl systemArticlehttps://doi.org/10.1038/s41598-021-99316-7info:eu-repo/semantics/openAccess