PIC computation of electron current collection to a moving bare tether in the mesothermal condition

Onishi, Tatsuo; Martínez-Sánchez, Manuel; Cooke, David L. y Sanmartín Losada, Juan Ramón (2001). PIC computation of electron current collection to a moving bare tether in the mesothermal condition. En: "27th International Electric Propulsion Conference", 15-19 Oct., Pasadena, California.

Descripción

Título: PIC computation of electron current collection to a moving bare tether in the mesothermal condition
Autor/es:
  • Onishi, Tatsuo
  • Martínez-Sánchez, Manuel
  • Cooke, David L.
  • Sanmartín Losada, Juan Ramón
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 27th International Electric Propulsion Conference
Fechas del Evento: 15-19 Oct.
Lugar del Evento: Pasadena, California
Título del Libro: Proceedings of the 27th IEPC, Oct, 2001, Pasadena, California, USA
Fecha: 2001
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

Texto completo

[img]
Vista Previa
PDF (Document Portable Format) - Se necesita un visor de ficheros PDF, como GSview, Xpdf o Adobe Acrobat Reader
Descargar (464kB) | Vista Previa

Resumen

In tethered satellite technology, it is important to estimate how many electrons a spacecraft can collect from its ambient plasma by a bare electrodynamic tether. The analysis is however very difficult because of the small but significant Geo-magnetic field and the spacecraft’s relative motion to both ions and electrons. The object of our work is the development of a numerical method, for this purpose. Particle-In-Cell (PIC) method, for the calculation of electron current to a positive bare tether moving at orbital velocity in the ionosphere, i.e. in a flowing magnetized plasma under Maxwellian collisionless conditions. In a PIC code, a number of particles are distributed in phase space and the computational domain has a grid on which Poisson equation is solved for field quantities. The code uses the quasi-neutrality condition to solve for the local potential at points in the plasma which coincide with the computational outside boundary. The quasi-neutrality condition imposes ne - ni on the boundary. The Poisson equation is solved in such a way that the presheath region can be captured in the computation. Results show that the collected current is higher than the Orbital Motion Limit (OML) theory. The OML current is the upper limit of current collection under steady collisionless unmagnetized conditions. In this work, we focus on the flowing effects of plasma as a possible cause of the current enhancement. A deficit electron density due to the flowing effects has been worked and removed by introducing adiabatic electron trapping into our model.

Más información

ID de Registro: 30957
Identificador DC: http://oa.upm.es/30957/
Identificador OAI: oai:oa.upm.es:30957
Depositado por: Biblioteca ETSI Aeronauticos
Depositado el: 17 Sep 2014 08:20
Ultima Modificación: 22 Abr 2016 01:11
  • Open Access
  • Open Access
  • Sherpa-Romeo
    Compruebe si la revista anglosajona en la que ha publicado un artículo permite también su publicación en abierto.
  • Dulcinea
    Compruebe si la revista española en la que ha publicado un artículo permite también su publicación en abierto.
  • Recolecta
  • e-ciencia
  • Observatorio I+D+i UPM
  • OpenCourseWare UPM