Role of superconducting shields in electrodynamic propulsion

Sanmartín Losada, Juan Ramón and Lorenzini, Enrico C. (2008). Role of superconducting shields in electrodynamic propulsion. "Journal of Propulsion and Power", v. 24 (n. 4); pp. 851-854. ISSN 0748-4658. https://doi.org/10.2514/1.30433.

Description

Title: Role of superconducting shields in electrodynamic propulsion
Author/s:
  • Sanmartín Losada, Juan Ramón
  • Lorenzini, Enrico C.
Item Type: Article
Título de Revista/Publicación: Journal of Propulsion and Power
Date: July 2008
ISSN: 0748-4658
Volume: 24
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Física Aplicada a la Ingeniería Aeronáutica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

An electrodynamic tether can propel a spacecraft through a planetary magnetized plasma without using propellant. In the classical embodiment of an electrodynamic tether, the ambient magnetic fleld exerts a Lorentz force on the current along the tether, the ambient plasma providing circuit closure for the current A suggested propulsion scheme would hypothetically eliminate tether performance dependence on the plasma density by using a full wire loop to close the current circuit, and a superconductor to shield a loop segment from the external uniform magnetic fleld and cancel the Lorentz force on that segment. Here, we use basic electromagnetic laws to explain how such a scheme cannot produce a net force. Because there is no net current in the superconducting shield, the circulation of the magnetic field along a closed line outside the full cross section, in its plane, is just due to the current flowing in the loop segment. The presence of the superconducting shield simply moves the Lorentz force from the shielded loop segment to the shield itself and, as a result, the total magnetic force, acting on full loop plus shield, remains zero.

More information

Item ID: 26674
DC Identifier: http://oa.upm.es/26674/
OAI Identifier: oai:oa.upm.es:26674
DOI: 10.2514/1.30433
Official URL: http://arc.aiaa.org/doi/abs/10.2514/1.30433
Deposited by: Biblioteca ETSI Aeronauticos
Deposited on: 27 May 2014 13:14
Last Modified: 22 Sep 2014 11:42
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