Langmuir probe analysis of highly electronegative plasmas

Journal Article · Mon Apr 15 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4802252· OSTI ID:22162852

Bredin, Jerome; Chabert, Pascal; Aanesland, Ane ^[1]

---

1. Laboratoire de Physique des Plasmas, Ecole Polytechnique, Palaiseau (France)

A Langmuir probe analysis of highly electronegative plasmas is proposed. Analytical models are used to fit the IV-characteristics and their second derivatives above and below the plasma potential. Ion and electron densities are obtained for {alpha} (negative ion to electron density ratio) up to 3000, and the temperature of negative and positive ions is obtained for {alpha} ranging from 100 to 3000. The transport across a localized magnetic barrier is studied using this technique. It is shown that an ion-ion (electron free) plasma is formed downstream from the barrier at the highest magnetic field.

• OSTI ID: 22162852
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 15 Vol. 102; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRIC CONDUCTIVITY
ELECTRON DENSITY
ELECTRONEGATIVITY
ELECTRONS
LANGMUIR PROBE
MAGNETIC FIELDS
PLASMA DENSITY
PLASMA POTENTIAL