Determination of error field sources by accurate mapping of the magnetic geometry of the H-1 heliac

High precision mapping of the vacuum flux surfaces of the H-1NF heliac is carried out using electron-beam multi-wire tomography for various magnetic configurations and field strengths. The extreme accuracy of this technique has been exploited to understand the nature of error fields and to determine...

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Bibliographic Details
Published in:Nuclear fusion 2009-03, Vol.49 (3), p.035001-035001 (12)
Main Authors: Kumar, Santhosh T.A, Blackwell, Boyd D, Harris, Jeffrey H
Format: Article
Language:English
Subjects:
Exact sciences and technology
General theory and basic studies of plasma lifetime, particle and heat loss, energy balance, etc
Magnetic confinement and equilibrium
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Stellarators, torsatrons, heliacs, bumpy tori, and other toroidal confinement devices
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Summary:High precision mapping of the vacuum flux surfaces of the H-1NF heliac is carried out using electron-beam multi-wire tomography for various magnetic configurations and field strengths. The extreme accuracy of this technique has been exploited to understand the nature of error fields and to determine the best-fit empirical values for the H-1NF coil parameters, by point-by-point matching experimental surface data with computer modelling results. This has helped in developing a highly accurate computer model for H-1NF magnetic configurations.
ISSN:0029-5515
1741-4326
DOI:10.1088/0029-5515/49/3/035001