Floating Bare Tether as Upper Atmosphere Probe

Sanmartín Losada, Juan Ramón; Charro, Mario; Peláez, J.; Tinao, I.; Elaskar, Sergio y Hilgers, A. (2004). Floating Bare Tether as Upper Atmosphere Probe. En: "2nd International Energy Conversion Engineering Conference", 16-19 Aug, Providence, Rhode Island. ISBN 1563477157.

Descripción

Título: Floating Bare Tether as Upper Atmosphere Probe
Autor/es:
  • Sanmartín Losada, Juan Ramón
  • Charro, Mario
  • Peláez, J.
  • Tinao, I.
  • Elaskar, Sergio
  • Hilgers, A.
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 2nd International Energy Conversion Engineering Conference
Fechas del Evento: 16-19 Aug
Lugar del Evento: Providence, Rhode Island
Título del Libro: Second International Energy Conversion Engineering Conference : a collection of technical papers
Fecha: 2004
ISBN: 1563477157
Materias:
Escuela: E.T.S.I. Aeronáuticos (UPM) [antigua denominación]
Departamento: Física Aplicada a la Ingeniería Aeronáutica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Use of a (bare) conductive tape electrically floating in LEO as an effective e-beam source that produces artificial auroras, and is free of problems that have marred standard beams, is considered. Ambient ions impacting the tape with KeV energies over most of its length liberate secondary electrons, which race down the magnetic field and excite neutrals in the E-layer, resulting in auroral emissions. The tether would operate at night-time with both a power supply and a plasma contactor off; power and contactor would be on at daytime for reboost. The optimal tape thickness yielding a minimum mass for an autonomous system is determined; the alternative use of an electric thruster for day reboost, depending on mission duration, is discussed. Measurements of emission brightness from the spacecraft could allow determination of the (neutral) density vertical profile in the critical E-layer; the flux and energy in the beam, varying along the tether, allow imaging line-of-sight integrated emissions that mix effects with altitude-dependent neutral density and lead to a brightness peak in the beam footprint at the E-layer. Difficulties in tomographic inversion, to determine the density profile, result from beam broadening, due to elastic collisions, which flattens the peak, and to the highly nonlinear functional dependency of line-of-sight brightness. Some dynamical issues are discussed.

Más información

ID de Registro: 30371
Identificador DC: http://oa.upm.es/30371/
Identificador OAI: oai:oa.upm.es:30371
Depositado por: Biblioteca ETSI Aeronauticos
Depositado el: 08 Jul 2014 06:37
Ultima Modificación: 22 Abr 2016 00:37
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