Berlin 2014 – scientific programme
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P: Fachverband Plasmaphysik
P 19: Poster Session - Low Temperature Plasmas
P 19.11: Poster
Wednesday, March 19, 2014, 16:30–18:30, SPA Foyer
Propagation and Absorption of Electron Bernstein Waves in Linear Plasma Devices — •Kirill Rumiantcev, Walter Kasparek, and Alf Köhn — Institut für Grenzflächenverfahrenstechnik und Plasmatechnologie, Stuttgart, Germany
Electromagnetic waves are used to deposit power in a plasma at electron cyclotron resonance (ωce). X- or O- waves have cuttoffs depending on the plasma density and configuration of magnetic field and the waves reflect at ωpe and ωRcuttoff respectively. However, there exists a conversion mechanism of O- and X- waves into an electrostatic wave which called the Bernstein wave. This type of waves has no cuttoffs and has a resonance at ωce making it possible to heat even over dense plasmas.
In this PhD work we will study the Bernstein waves and the conversion mechanism in a simplified geometry of a linear device in Stuttgart called FLIPS. A plasma will be created by electron cyclotron resonance heating at 2.45 GHz. Making use of the simplicity of the geometry it is possible to run a full wave simulation of the conversion mechanism and propagation of the Bernstein waves. The flexibility of the device allows us to create a magnetic mirror configuration and to study how it affects on the absorption of the Bernstein waves.
The details of experimental set up will be presented as well as results of the full wave simulation of the propagation and the absorption of the Bernstein waves and the first antenna prototype to excite the waves in the plasma.