Bulletin of the American Physical Society
56th Annual Meeting of the APS Division of Plasma Physics
Volume 59, Number 15
Monday–Friday, October 27–31, 2014; New Orleans, Louisiana
Session UP8: Poster Session VIII: FRC, Spheromaks, Stellarators and Other Magnetic Confinement Systems; HEDP & ICF: Hydro, Simulations and Diagnostics
Thursday, October 30, 2014
Room: Preservation Hall
Abstract ID: BAPS.2014.DPP.UP8.55
Abstract: UP8.00055 : The design of a MSE polarimetry diagnostic for the measurement of radial electric fields on the HSX stellarator
Preview Abstract Abstract
HSX is a quasi-symmetric stellarator that is designed to reduce neoclassical transport. Neoclassical codes estimate a large positive radial electric field (40-50 kV/m) near the core of the HSX plasma. Impurity ion flow measurements could not resolve this large electric field. A single channel, dual PEM (Photo Elastic Modulators) MSE polarimetry diagnostic has therefore been designed for the HSX stellarator to directly measure the radial electric field near the core of the plasma. The design has been optimized to get a maximum change in polarization angle from a radial electric field with a good spatial resolution. A change in radial electric field as small as 1.5 kV/m can be detected with a careful selection of the sightline. The diagnostic design and initial characterization are presented.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2014.DPP.UP8.55
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