Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Characterization of the Ion Beam Neutralization of Plasma Thrusters Using Collecting and Emissive Langmuir Probes
Year:2013
Research Areas
  • Phisics
Information
Abstract
In gridded electrostatic plasma thrusters, an ion current is extracted from a primary plasma and later accelerated to impart thrust. The operation modes are strongly influenced by the neutralization of the ion current which otherwise becomes space charge limited. This neutralization process is investigated in a small diameter ring cusp ion thruster by using both collecting and emissive Langmuir probes. The ion beam was neutralized by a DC current heated wire placed at the outer section of the thruster and the probes were located between 11 and 24 cm along the axial axis of symmetry. The outgoing ion current is determined by both the magnitude of the discharge current and the ion extraction and the acceleration potentials. The levels of thrust calculated from the emitted ion current are equivalent to similar devices but requiring lower electric power levels. The experimental results evidence that the electron neutralization current not only controls the space charge level of extracted ion currents, but it also affects the spatial properties of the emitted plasmas plumes. The electron temperature of the plasma decreases along the axial distance when the neutralization of the ion beam becomes more effective. On the contrary, higher neutralizer electron currents increase the outgoing plasma density. These experimental results suggest that subtle physical mechanisms are involved in the ion beam electron neutralization process.
International
Si
JCR
Si
Title
Contributions to Plasma Physics
ISBN
0863-1042
Impact factor JCR
1,108
Impact info
Datos JCR del año 2011
Volume
53
10.1002/ctpp.201310010
Journal number
From page
57
To page
62
Month
SIN MES
Ranking
Participants
  • Autor: Elena Roibas Millan (UPM)
  • Autor: Sandra Pilar Tierno Gomez (UPM)
  • Autor: Ernesto Criado Hidalgo
  • Autor: Juan Luis Domenech Garret (UPM)
  • Autor: Jose Manuel Donoso Vargas (UPM)
  • Autor: Luis Conde Lopez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Investigación en Fusión Inercial y Física de Plasmas
  • Departamento: Física Aplicada a la Ingeniería Aeronáutica
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)