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  Ion and Electron Whistler Wave Dispersion Experiments

Franck, C. M., Klinger, T., & Grulke, O. (2003). Ion and Electron Whistler Wave Dispersion Experiments. In I. Falconer Dewar R.L., & J. Khachan (Eds.), Plasma Physics. 11th International Congress on Plasma Physics: ICPP2002 (pp. 404-407). Melville,NY: American Institute of Physics.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-3DE9-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-3DEA-C
Genre: Book Chapter

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 Creators:
Franck, C. M.1, Author              
Klinger, T.1, 2, Author              
Grulke, O.1, 2, Author              
Affiliations:
1Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856285              
2VINETA, Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856311              

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Free keywords: 11th International Congress on Plasma Physics: ICPP2002, Sydney, 2002-07-15 to 2002-07-19
 Abstract: Although whistler waves are studied for almost a century, they are still subject of intense research. Laboratory experiments are of particular value for the interpretation of satellite data, which is often ambiguous or at least difficult to understand. The linear plasma experiment VINETA, which is designed to form a large (4.5m column length, up to 40cm diameter) and dense (ne ≤ 1019 m–3) plasma with great flexibility in the magnetic field configurations (max. field B0 = 100mT). In the present contribution we discuss investigations on electron whistler waves, right-hand polarised electromagnetic waves in the frequency range ωci << ω ≤ ωce, and ion whistler waves, left-hand polarised electromagnetic waves below the ion cyclotron frequency ω < ωci. Firstly, the dispersion behaviour of electron whistler waves is studied at wavelength up to the plasma dimensions. For smaller wavelengths it turns out that the dispersion relation derived for unbounded whistler waves describes the experimental observations well. For wavelengths greater than the vacuum vessel diameter it is necessary to take the boundary into account. The transition between the two regimes is studied for constant plasma conditions. Secondly, ion whistler waves are considered. In a single-component plasma, the wave dispersion has a real solution only for frequencies below the ion cyclotron frequency ωci. In a multicomponent plasma, the dispersion relation of ion whistler waves exhibit a different behaviour. In an intermediate frequency regime located between the two neighbouring ion cyclotron frequencies, the wave has a maximum group velocity. This feature is used as a diagnostic tool in satellite measurements to determine the ion composition in atmospheric plasmas, but the results have been subject of a scientific debate. Our laboratory study shows first results on ion whistler wave measurements and aims to contribute to clarify the discussed discrepancies.

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Language(s): eng - English
 Dates: 2003
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 65206
URI: http://dx.doi.org/10.1063/1.1593951
 Degree: -

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Title: Plasma Physics. 11th International Congress on Plasma Physics: ICPP2002
Source Genre: Book
 Creator(s):
Falconer Dewar R.L., I.A., Editor
Khachan, J., Editor
Affiliations:
-
Publ. Info: Melville,NY : American Institute of Physics
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 404 - 407 Identifier: -

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Title: AIP Conference Proceedings
Source Genre: Series
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Pages: - Volume / Issue: 669 Sequence Number: - Start / End Page: - Identifier: -