Experience on a cryogenic linear mechanism based on superconducting levitation

Javier Serrano-Tellez; Fernando Romera-Juarez; David González-de-María; Mikel Lamensans; Heribert Argelaguet-Vilaseca; José-Luis Pérez-Díaz; Juan Sánchez-Casarrubios; Efrén Díez-Jiménez; Ignacio Valiente-Blanco

doi:10.1117/12.925165

13 September 2012 Experience on a cryogenic linear mechanism based on superconducting levitation

Javier Serrano-Tellez, Fernando Romera-Juarez, David González-de-María, Mikel Lamensans, Heribert Argelaguet-Vilaseca, José-Luis Pérez-Díaz, Juan Sánchez-Casarrubios, Efrén Díez-Jiménez, Ignacio Valiente-Blanco

Author Affiliations +

Proceedings Volume 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II; 84501Y (2012) https://doi.org/10.1117/12.925165
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The instrumentation of many space missions requires operation in cryogenic temperatures. In all the cases, the use of mechanisms in this environment is a matter of concern, especially when long lifetime is required. With the aim of removing lifetime concerns and to benefit from the cryogenic environment, a cryogenic contactless linear mechanism has been developed. It is based on the levitation of a permanent magnet over superconductor disks. The mechanism has been designed, built, and tested to assess the performances of such technology. The levitation system solves the mechanical contact problems due to cold-welding effects, material degradation by fatigue, wearing, backlash, lubrication...etc, at cryogenic temperatures. In fact, the lower is the temperature the better the superconductor levitation systems work. The mechanism provides a wide stroke (18mm) and high resolution motion (1μm), where position is controlled by changing the magnetic field of its environment using electric-magnets. During the motion, the moving part of the mechanism levitates supported by the magnetic interaction with the high temperature type II superconductors after reaching the superconductor state down to 90K. This paper describes the results of the complete levitation system development, including extensive cryogenic testing to measure optically the motion range, resolution, run-outs and rotations in order to characterize the levitation mechanism and to verify its performance in a cryogenic environment.

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Javier Serrano-Tellez, Fernando Romera-Juarez, David González-de-María, Mikel Lamensans, Heribert Argelaguet-Vilaseca, José-Luis Pérez-Díaz, Juan Sánchez-Casarrubios, Efrén Díez-Jiménez, and Ignacio Valiente-Blanco "Experience on a cryogenic linear mechanism based on superconducting levitation", Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 84501Y (13 September 2012); https://doi.org/10.1117/12.925165

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