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Your search keyword '"Perez-Diaz, J. L."' showing total 19 results
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19 results on '"Perez-Diaz, J. L."'

1. Improving Resolution and Run Outs of a Superconducting Noncontact Device for Precision Positioning

Author

Valiente-Blanco, I., Diez-Jimenez, E., Sanchez-Garcia-Casarrubios, J., and Perez-Diaz, J. L.

Subjects
Physics - Applied Physics
Abstract

This paper describes the improvement of the performance of a long-stroke high-precision positioning slider suitable for cryogenic environments due to the application of a set of design rules given in a previous paper. The device, based on superconducting magnetic levitation, is self-stable and does notmake contact between the slider and the guideline, avoiding tribological and lubrication problems associated with cryogenics., Comment: accepted paper after embargo period

Published
2024
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2. Dynamics of a Superconducting Linear Slider

Author

Valiente-Blanco, I., Perez-Diaz, J. L., and Diez-Jimenez, E.

Subjects
Physics - Applied Physics
Abstract

In this paper, the dynamic behavior of a one degree-of-freedom (DOF) contactless linear slider based on superconducting magnetic levitation is experimentally analyzed. The device is intended for precision positioning of an optic mirror in cryogenic environments. Different prototypes of this device have been tested at cryogenic temperatures (77 K), and their mechanical behavior characterized in the sliding direction for forced and unforced oscillations. Experimental results reveal that the slider is self-stable at the initial equilibrium position and the dynamic behavior fits well an underdamped harmonic oscillator. Finally, the device showed great potential for horizontal vibration isolation, acting as a low-pass filter with a resonance at about 0.9 Hz, Comment: accepted paper after embargo period

Published
2024
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10. Magnetic Non-Contact Harmonic Drive

Author

Perez-Diaz, J. L., primary, Diez-Jimenez, E., additional, Cristache, C., additional, Valiente-Blanco, I., additional, Alvarez-Valenzuela, M. A., additional, Castro, V., additional, Ruiz-Navas, E. M., additional, Sanchez-Garcia-Casarrubios, J., additional, Ferdeghini, C., additional, Canepa, F., additional, Hornig, W., additional, Carbone, G., additional, Plechacek, J., additional, Amorin, A., additional, Serrano, J., additional, and Sanz, V., additional

Published
2013
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12. Contactless Superconducting Magnetic Instrument for Precise Positioning in Cryogenic Environments

Author

Perez-Diaz, J. L., primary, Valiente-Blanco, I., additional, Diez-Jimenez, E., additional, Sanchez-Garcia-Casarrubios, J., additional, Alvarez-Valenzuela, M. A., additional, Cristache, C., additional, Serrano, J., additional, Romera-Juarez, F., additional, Gonzalez-de-Maria, D., additional, Lamesans, M., additional, and Argelaguet-Vilaseca, H., additional

Published
2013
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14. Universal Model for Superconductor-Magnet Forces in the Static Limit.

Author

Perez-Diaz, J. L., Garcia-Prada, J. C., and Diaz-Garcia, J. A.

Subjects
MAXWELL equations, FORCE & energy, TORQUE, MAGNETIC fields, SUPERCONDUCTORS
Abstract

London and Maxwell equations are used in order to derive an exact and universal expression for the force and torque between a magnetic field (eventually a magnet) and a superconductor. This expression is useful for any shape and size of both magnet and superconductor and is suitable for finite elements calculations in the static limit. Furthermore, the equivalence of our general purpose expression with the well-known method of images is demonstrated for the case of a semi-infinite plane superconductor. [ABSTRACT FROM AUTHOR]

Published
2008

15. FEM Algorithm for Solving Superconducting Meissner Repulsion Forces.

Author

Diez-Jimenez, E., Perez-Diaz, J. L., and Castejon, C.

Subjects
FINITE element method, ALGORITHMS, SUPERCONDUCTORS, MEISSNER effect, FORCE & energy, SURFACES (Technology), MAGNETIC fields
Abstract

The Perez-Diaz and Garcia-Prada expression gives the force due to the Meissner effect for any surface element of a superconductor in a magnetic field. This paper proposes an algorithm for the integration of this expression in a superconductor of any shape. The convergence of the algorithm has been checked with respect to the finite elements' size and has been compared to analytical solutions for simple geometries. The results showed good accuracy, whilst not requiring high specification computing technology. [ABSTRACT FROM AUTHOR]

Published
2010

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