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Memorias de investigación
Artículos en revistas:
Measurements of plasma properties using the floating potential of emissive Langmuir probes
Año:2013
Áreas de investigación
  • Física
Datos
Descripción
The measurement of the plasma potential of unmagnetized Maxwellian plasmas by using the floating potential of emissive Langmuir probes is discussed. The temperature of the probe was monitored in order to estimate the emitted thermoionic electron current and to determine the limits of the strong electron emission regime. Under these ideal conditions, the measurements of the plasma potential of the emissive probe are cross checked against those of collecting Langmuir probes. In agreement with previous works, the current voltage curves of emissive probes show the temperature dependent electron saturation currents. An empirical expression is suggested for the dependence of this saturation current with the probe temperature which recovers the response of collecting probes when the probe is cold. The experimental data indicate that the floating potential of the emissive probe is close to the local plasma potential only when the emitted thermoionic electron current is similar to the electron saturation current. Larger electron emission currents lead to small increments the floating potential over the local plasma potential. Our results suggest that the electron saturation current of a hot emissive probe is composed by the thermal electrons from the plasma and a returned fraction of the thermoionic emitted electrons.
Internacional
Si
JCR del ISI
Si
Título de la revista
Contributions to Plasma Physics
ISSN
0863-1042
Factor de impacto JCR
1,108
Información de impacto
Datos JCR del año 2011
Volumen
53
DOI
10.1002/ctpp.201310003
Número de revista
Desde la página
16
Hasta la página
21
Mes
SIN MES
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Sandra Pilar Tierno Gomez (UPM)
  • Autor: Elena Roibas Millan (UPM)
  • Autor: Juan Luis Domenech Garret (UPM)
  • Autor: Jose Manuel Donoso Vargas (UPM)
  • Autor: Luis Conde Lopez (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Grupo de Investigación en Fusión Inercial y Física de Plasmas
  • Departamento: Física Aplicada a la Ingeniería Aeronáutica
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