Langmuir Probe Measurements in Plasma Shadows

Journal Article · Sun Jan 15 00:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2168881· OSTI ID:20797955

Waldmann, O ^[1]; Koch, B; Fussmann, G ^[1]

---

1. Max-Planck-Institut fuer Plasmaphysik, TI Greifswald, Wendelsteinstr. 1, 17491 Greifswald, EURATOM Association (Germany)

When immersing a target into a plasma streaming along magnetic field lines, a distinct shadow region extending over large distances is observed by the naked eye downstream of the target.In this work we present an experimental study of the effect applying Langmuir probes. In contrast to expectations, there are only marginal changes in the profiles of temperature and density behind masks that cut away about 50% of the plasma cross-section. On the other hand, the mean density is drastically reduced by an order of magnitude. First attempts to simulate the observations by solving the classical 2D diffusion equation were not successful.

• OSTI ID: 20797955
• Journal Information: AIP Conference Proceedings, Vol. 812, Issue 1; Conference: PLASMA 2005: International conference on research and applications of plasmas; 3. German-Polish conference on plasma diagnostics for fusion and applications; 5. French-Polish seminar on thermal plasma in space and laboratory, Opole-Turawa (Poland), 6-9 Sep 2005; Other Information: DOI: 10.1063/1.2168881; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIFFUSION EQUATIONS
DISTANCE
ELECTRON TEMPERATURE
ION TEMPERATURE
LANGMUIR PROBE
MAGNETIC FIELDS
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
RADIATION TRANSPORT