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Proceedings Paper

Experience on a cryogenic linear mechanism based on superconducting levitation
Author(s): 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
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Paper 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.

Paper Details

Date Published: 13 September 2012
PDF: 9 pages
Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 84501Y (13 September 2012); doi: 10.1117/12.925165
Show Author Affiliations
Javier Serrano-Tellez, LIDAX (Spain)
Fernando Romera-Juarez, LIDAX (Spain)
David González-de-María, LIDAX (Spain)
Mikel Lamensans, LIDAX (Spain)
Heribert Argelaguet-Vilaseca, LIDAX (Spain)
José-Luis Pérez-Díaz, Univ. Carlos III de Madrid (Spain)
Juan Sánchez-Casarrubios, Univ. Carlos III de Madrid (Spain)
Efrén Díez-Jiménez, Univ. Carlos III de Madrid (Spain)
Ignacio Valiente-Blanco, Univ. Carlos III de Madrid (Spain)

Published in SPIE Proceedings Vol. 8450:
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II
Ramón Navarro; Colin R. Cunningham; Eric Prieto, Editor(s)

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