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APS » Journals » Phys. Rev. E » Volume 78 » Issue 4
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Phys. Rev. E 78, 046405 (2008) [11 pages]

Rotation of a strongly magnetized hydrogen plasma column determined from an asymmetric Balmer- β spectral line with two radiating distributions

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A. E. Shumack1, V. P. Veremiyenko1, D. C. Schram1,2, H. J. de Blank1, W. J. Goedheer1, H. J. van der Meiden1, W. A. J. Vijvers1, J. Westerhout1, N. J. Lopes Cardozo1,2, and G. J. van Rooij1
1FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, Nieuwegein, The Netherlands
2Eindhoven University of Technology, Eindhoven, The Netherlands

Received 1 June 2008; published 27 October 2008

A potential buildup in front of a magnetized cascaded arc hydrogen plasma source is explored via E⃗×B⃗ rotation and plate potential measurements. Plasma rotation approaches thermal speeds with maximum velocities of 10 km∕s. The diagnostic for plasma rotation is optical emission spectroscopy on the Balmer-β line. Asymmetric spectra are observed. A detailed consideration is given on the interpretation of such spectra with a two distribution model. This consideration includes radial dependence of emission determined by Abel inversion of the lateral intensity profile. Spectrum analysis is performed considering Doppler shift, Doppler broadening, Stark broadening, and Stark splitting.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.78.046405
DOI:
10.1103/PhysRevE.78.046405
PACS:
52.70.−m, 52.50.−b, 52.75.−d
 
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