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Memorias de investigación
Communications at congresses:
Multiprobe characterization of plasma flows for space propulsion
Year:2017
Research Areas
  • Physics - Plasma and fluid
Information
Abstract
Plasma engines for space propulsion generate plasma jets (also denominated plasma plumes) having supersonic ion groups with typical speeds in the order of tens of kilometers per second, which lies between electron and ion thermal speeds. Studies of the stationary plasma expansion process using a four-grid retarding field energy analyzer (RFEA), an emissive probe (EP) and a Langmuir probe (LP), all mounted on a three dimensionally (3D) displaced multiprobe structure are discussed. Specifically, the determination of plasma beam properties from the RFEA current ?voltage (IV) characteristic curves is presented. The experimental results show the ion energy spectra to be essentially unchanged over 300 mm along the plasma-jet expansion axis of symmetry. The measured ion velocity distribution function (IVDF) results from the superposition of different ion groups and has two dominant populations: A low-energy group constituted of ions from the background plasma is produced by the interaction of the plasma jet with the walls of the vacuum chamber. The fast-ion population is composed of ions from the plasma beam moving at supersonic speeds with respect to the low-energy ions. The decreasing spatial profiles of the plasma-jet current density are compared with those of the low-energy ion group, which are not uniform along the axis of symmetry because of the small contributions from other ion populations with intermediate speeds.
International
Si
Congress
12th International Workshop on Electric Probes in Magnetized Plasmas (IWEP2017)
960
Place
Naklo, Eslovenia
Reviewers
Si
ISBN/ISSN
978-961-6207-41-6
Start Date
04/09/2017
End Date
07/09/2017
From page
1071
To page
1072
Book of abstracts / 12th International Workshop on Electric Probes in Magnetized Plasmas, IWEP2017
Participants
  • Autor: Julius Damba (UPM)
  • Autor: P. Argente
  • Autor: P.E. Maldonado
  • Autor: A. Cervone
  • Autor: Juan Luis Domenech Garret (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 Las Ingenierías Aeronáutica y Naval
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