RT Journal Article T1 Superconducting noncontact device for precision positioning in cryogenic environments A1 Pérez Díaz, José Luis A1 Valiente Blanco, Ignacio A1 Díez Jiménez, Efrén A1 Sanchez Garcia-Casarrubios, Juan AB In this paper, a noncontact linear positioner based on superconducting magnetic levitation for high-precision positioning has been tested under cryogenic conditions (similar to 20 K and similar to 10(-6) Pa). The prototype is able to achieve submicrometric positioning resolution of 230 +/- 30 nm RMS along a stroke of +/- 9 mm length with a current resolution of 15 mu A, and a peak current requirement lower than +/- 500 mA. In addition, it was demonstrated that an open-loop control strategy could be used for positioning the moving part with the accuracy of the order of 1 mu m. On the other hand, deviations of the slider position were found to be +/- 650 mu rad for the pitch, lower than 100 mu rad for the yaw, +/- 2000 mu rad for the roll, and +/- 4 mu m for the lateral run, all of them related to a full stroke motion. These results reveal a good performance of the device and demonstrate the potential of a new tool for applications, where high-precision positioning is required within a long range in cryogenic environments like far-infrared interferometry. PB IEEE SN 1083-4435 YR 2014 FD 2014-04-01 LK https://hdl.handle.net/10016/39794 UL https://hdl.handle.net/10016/39794 LA eng NO Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. DS e-Archivo RD 17 jul. 2024