A simple experimental method to determine magnetic field topology in toroidal plasma devices

Estimation of the parallel wavenumber in plasma devices finds wide applications such as determining the nature of instabilities. This task is often challenging, especially in toroidal magnetic configurations. In the present work, a simple yet effective method of achieving accurate probe-alignment al...

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Bibliographic Details
Published in:Review of scientific instruments 2015-03, Vol.86 (3), p.033504-033504
Main Authors: Thatipamula, Shekar G, Shukla, Umesh K, Ganesh, R, Saxena, Y C, Raju, D
Format: Article
Language:English
Subjects:
Alignment
Experimental methods
Magnetic fields
Magnetism
Plasma
Scientific apparatus & instruments
Toroidal plasmas
Wavelengths
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Summary:Estimation of the parallel wavenumber in plasma devices finds wide applications such as determining the nature of instabilities. This task is often challenging, especially in toroidal magnetic configurations. In the present work, a simple yet effective method of achieving accurate probe-alignment along the magnetic field lines is demonstrated in a simple magnetized toroidal device BETA (Basic Experiments in Toroidal Assembly). The alignment was achieved by aligning each probe to a tiny localized plasma source. Such an alignment is necessary for determining the parallel wavenumber precisely. The probe-alignment was confirmed further from the measurements in the plasma and the corresponding parallel wavenumber was found to be in good agreement with the analytical predictions.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4914388